Temitope Abodunrin - Academia.edu (original) (raw)

Papers by Temitope Abodunrin

Over the years, scientific computing has contributed immensely to computational mathematics. Math... more Over the years, scientific computing has contributed immensely to computational mathematics. Mathematica computer programming codes is known to provide computation and quick results. This research article is specifically built to generate Mathematica computer programming codes of exponentially fitted concurrent Milne's device (EFCMD) for solving special problems. Exponentially fitted concurrent Miln device is formulated via collocation/interpolation with power series as the approximate solution. Analyzing the EFCMD will produce the main local truncation error (MLTE) after showing the order, results were shown to demonstrate the functioning of Mathematica programming codes of EFCMD for resolving special problems at some selected bounds of convergence. The finished results were obtained with the assistance of Mathematica 9 kernel. Numerical results display that EFCMD do better than existing methods in terms of the maximum errors in the least studied bound of convergence as a result of varying/designing a suitable pace size, ascertain bound of convergence and error control.

IOP Conference Series: Materials Science and Engineering, 2021

Dye-sensitized solar cells (DSCs)as photovoltaics have been subject of intensive research in the ... more Dye-sensitized solar cells (DSCs)as photovoltaics have been subject of intensive research in the last two decades owing to their outstanding features of relative thermal stability, low cost, optical tunability, ability to operate under conditions of poor lighting, and environment friendliness as such, they offer a promising substitute for conventional monocrystalline silicon solar cells. Their poor output efficiency has been incessantly associated with grain boundaries, good quality films are associated with lower recombination decays. and it has been claimed that grain boundaries have a negligible influence on performance. We used microscopy interrelated with scanning electron microscopy to resolve spatially the recombination dynamics from organic films of Murraya Koenigii. Stoichiometric organic films, varied in different grains even for the same film. In regions where grain boundaries were dimmer, nonradiative decay occurred faster. Ultraviolet spectroscopy showed positive correl...

2022 5th Information Technology for Education and Development (ITED)

IOP Conference Series: Earth and Environmental Science, 2021

Global warming is sketching the isobars on weather maps in a different way, owing to new patterns... more Global warming is sketching the isobars on weather maps in a different way, owing to new patterns and their climatic imprint. Climatological reports have shown that atmospheric pressure fluctuations in the past five decades has strong affiliations with human stimulus. Any infinitesimal change in air pressure could produce a dramatic climatic effect, such as wind, precipitation, diurnal perturbations and storms. Pressure in air is the pointing device for atmosphere’s circulation, and consequently, determines how humidity circulates. Progressive studies on air pressure from both experimental and theoretical sources have corroborated with each other. The potential for atmospheric pressure is a function of the individual sum of oxygen, carbondioxide, water vapor, nitrogen, and noble gases in air. Although, it is difficult to predict the life span of these atmospheric gases, we cannot assume that the abundance of either of these gases has remained constant over geologic time. This study ...

IOP Conference Series: Earth and Environmental Science, 2021

We investigate the influences of photoanode on light scattering and absorption in a dye-sensitize... more We investigate the influences of photoanode on light scattering and absorption in a dye-sensitized solar cell (DSSC). N719 dye on a monolayer anode of TiO2 film and ZnO film, are compared in terms of their photovoltaic conversion efficiency. Doctor blade application and high temperature sintering of photoanode assemblage on indium doped tin oxide glass was adopted for preparation of the two photoanodes. The optical density of the interfacial layer relative to the photogenerated carriers is determined by absorption of ionic electrolytes. The outcome obtained with different photosensitizing effect of organic T.danielliimolecules on DSSCs showed a wide disparity, the highest Voc was recorded with Br− with 500 mV and 79 mV respectively for TiO2 and ZnO photoanode respectively. Three important morphological characterization techniques were used, scanning electron microscopy (SEM) with energy dispersive spectrum (EDS), Electron shell occupancy and Entropy were discussed in detail with res...

IOP Conference Series: Earth and Environmental Science, 2021

Every living or non-living thing has its unique temperature consequent of absorption of electroma... more Every living or non-living thing has its unique temperature consequent of absorption of electromagnetic radiation, light. The source of this molecular kinetic is Solar energy incident on Earth’s surface, the sole supplier of life on the planet. This phenomenon markedly determines the climatic conditions in our habitat. Atypical of previous much-required characteristic balance in nature, myriads of surface processes, ranging from evaporation, photosynthesis and even terrestrial carbon uptake effects are becoming altered in nature. These effects on long-term timing of events defines global warming, it distinguishes the diurnal from seasonal course of surface temperatures and shortwave radiation which contains larger quantity of energy and longwave radiation which holds less amount of energy. Earth’s emitted longwave radiation, also has major practical implications on solar energy technologies, agricultural productivity, profound environmental, societal, and economic implications. Ther...

Cogent Engineering, 2019

as soon as possible after acceptance. Copyediting, typesetting, and review of the resulting proof... more as soon as possible after acceptance. Copyediting, typesetting, and review of the resulting proof will be undertaken on this manuscript before final publication of the Version of Record (VoR). Please note that during production and pre-press, errors may be discovered which could affect the content.

Journal of Physics: Conference Series, 2017

Dye-sensitized solar cells (DSSCs) have acquired great prominence as favourable low-cost photovol... more Dye-sensitized solar cells (DSSCs) have acquired great prominence as favourable low-cost photovoltaics due to their ease of fabrication, all-year-availability, ease of obtaining raw materials and adjustable optical properties like transparency and colour. These advantages coupled with the ability to work under poor lighting makes them a suitable candidate for next generation of research. In this research, C.acuminata-sensitized photo anodes play an important role for achieving high performance since the porous metal oxide films provide a large specific surface area for dye loading and the possibility to extend the absorption threshold of past studies of sensitizers. The doctor blade method and high-temperature sintering were some of the methods used in the fabrication of the photo anode. A study of the performance of the C.acuminata-DSSCs with four different electrolyte sensitizers based on iodide redox mediator is determined. The result is DSSCs that exhibit a maximum power output of 39.37 W, fill factor of 0.7 and a power conversion efficiency of 0.6% under unfavourable sunlight intensity conditions and photo-degradation of about 37.5 % in absorbance after 425 suns.

IOP Conference Series: Earth and Environmental Science, 2021

This study appraises anticipated vicissitudes to surface wind characteristics from 1980-2018 in I... more This study appraises anticipated vicissitudes to surface wind characteristics from 1980-2018 in Ikogosi South-Western Nigeria. Changes in wind speeds at regional and global levels are signals of global warming. A concern about climate change has been a major driving force for the speedy expansion experienced in wind energy projects. Yearly investigation of wind speed disguises seasonal variation in predictive planning. At times, these changes fluctuate across seasons in some zones. The Inter-governmental Panel on Climate Change (IPCC) gave a proponent for long-term changes in the large-scale atmospheric circulation. In effect, observed changes such as poleward shifts and reinforcement of westerly winds will likely be promoted. Projected changes to annual wind speed display altitudinal variability compared to seasonal and annual mean wind speed. An evaluation of wind changes at specific locations is therefore necessary for site-specific application. This paper presents experience at ...

IOP Conference Series: Earth and Environmental Science, 2018

Materials Sciences and Applications, 2015

A new strategy for evaluating the efficiency of Dye-sensitized Solar Cell (DSC) employed in this ... more A new strategy for evaluating the efficiency of Dye-sensitized Solar Cell (DSC) employed in this study was to introduce a device stabilizer which also functioned as an external load. This aim was accomplished through computations of efficiency of different DSCs based on n-Mosfet transistor. Transistor Z44 mosfet’s impact on the DSC systems was to significantly moderate the effect of two vital components namel; the photoanodes and electrolyte sensitizers. The outcome of the Z44 mosfet incorporation inside the DSC was a synchronization in photovoltaic spectral responses thereby, minimizing the common limitations of DSCs such as dye synergy, redox kinematics, photophysics and roughness factor which is not restrictive to N719 dyes. This study presents the results of indiumdoped tin oxide (ITO) conducting glass doped DSCs with different electrolytes enhanced with a transistor mosfet; short-circuit current density (Isc) of 0.104 A cm , open-circuit voltage (Voc) of 240.6 mV, efficiency of...

Heliyon, 2020

Dangerous environmental consequences and market unpredictability of fossil fuels have necessitate... more Dangerous environmental consequences and market unpredictability of fossil fuels have necessitated the need for sustainable large-scale production of biofuel in Nigeria. Unrefined palm oil (UPO) is a significant product of commercially available oil palm plants in the country. This study experimentally investigates the production of biodiesel from refined, bleached and deodorised (RBD) palm olein extracted from UPO obtained from batch reactors. The transesterification process of the RBD palm olein with methanol and in the presence of potassium hydroxide (KOH) catalyst produced biodiesel with a 62.5% yield, thus confirming its feasibility for mass production. The derived biodiesel has properties equivalent to ASTM D792 standard for biodiesel fuels.

Authorea, 2020

This study is considered to formulate Mathematica pseudocodes for implementing block Adams family... more This study is considered to formulate Mathematica pseudocodes for implementing block Adams family (MPIBAF). An idea
multinomial basis function approximant will be utilized to process the interpolation and collocation methods. A special block Adams family in form of block Adams-Bashforth and Block Adams-Moulton methods will be developed via interpolation and
collocation method to foster the principal local truncation error thereby bringing into existence the convergency limits. The application of Mathematica pseudocodes will be processed on some applied math problems in a parallel manner with each processor depending on one another. The computable results will be produced via a compiled Mathematica pseudocode in a gradual manner. In addition, technical computation supersedes manual computation as demonstrated by the results of the numerous gains such as ease of computable processes and structures, better accuracy and quicker convergency.

Journal of Physics: Conference Series

Energy is a requirement for daily existence and a necessity for driving all technology. Thus, ind... more Energy is a requirement for daily existence and a necessity for driving all technology. Thus, indices for generating energy will always be a valid reason for research. It therefore stands to reason that; numerous experimental effort has been devoted to the quest of energy generation. This quest has witnessed a lot of progression, newer innovations being an improvement over older editions. Recent energy studies have shifted its focus from dominant monocrystalline silicon solar cells to organic material sources. This is in the wake of the high expenses incurred in installation of any silicon solar technology. Although the economy of scale applies to increased use of silicon panels, it does not delete the looming future threat of disposal of expired silicon solar panels. This brings to fore, a need for an energy substitute that possesses the salient attributes of monocrystalline silicon solar cells without the limitations. Amongst all the alternatives, the low cost and environmentally benign dye-sensitized solar cells (DSCs) has remained prominent. Other desirable characteristics of dye-sensitized solar cells is all-year availability of raw materials, capacity to perform under low diffuse light conditions, ability to withstand extreme conditions contrary to their silicon counterparts are sterling qualities which necessitate detailed enquiry into dye-sensitized solar technology. In spite of these excellent properties, wide adoption of DSCs is limited by its poor output efficiency relative to monocrystalline silicon solar cells. The significance of this research is thus to investigate optical spectral responses of S.Anisatum dye-sensitized solar cells with an objective to analyze its photovoltaic output and prospect for micro-energy production. Preliminary phytochemical analysis portends S.Anisatum dye as rich in phenols. UV/VIS spectroscopy reveals a porphyrin characteristic absorbance. This research corroborates previousstudies such as photovoltaic output of B.spectabilis DSCs to different electrolytes. The spectral responses revealed 0.065 mA, 140 mV, 5.32 X 10-6 W and 0.86 % respectively as I sc , V oc , P max and ƞ highest output value. Although this result is comparatively low to monocrystalline silicon panels, it conforms with existing standard porphyrin efficiency. This study provides impetus for further studies of S.Anisatum DSCs co-sensitization with other dyes and finds application in modelling of material of synthetic origin.

Procedia Manufacturing, 2018

(Magnifera indica Linn.) leaf dye as dye sensitizer for solar cells. Unlike previous approaches, ... more (Magnifera indica Linn.) leaf dye as dye sensitizer for solar cells. Unlike previous approaches, it employed batch-separated M.indica L. to sensitize two groups of dye-sensitized solar cells (DSCs). Parameters such as short circuit current (Isc), open circuit
voltage (Voc), maximum power (Pmax), fill factor (ff), incident photon to conversion efficiency (IPCE) and output efficiency (ƞ) were used to determine the outcome of the M.indica L. DSCs. The doctor blade method and high temperature sintering at 450 0C
was used in the preparation of both photoanodes. Photovoltaic results reveal DSCs with a higher efficiency of 4.75 x 10-3 % in crude M.indica L. than 0.07 x 10-3 % for batch separated hexane faction of M.indica L. under same conditions of standard air mass. Remarkably, the hexane M.indica L.DSC recorded larger values of Isc and Voc. The significance of this result is that crude M.indica L DSCs are more affordable, have a facile production process and is an ecologically safe alternatives to silicon solar
cells. Although the efficiencies are comparatively low, further research with a solar simulator and co-sensitization with other dyes is recommended for better outcome.

Procedia Manufacturing

The study demonstrates the impact that maximum light-scattering effect has on negligible amount o... more The study demonstrates the impact that maximum light-scattering effect has on negligible amount of P.macrophylla B. dye. It investigated the influence of particle size on intensity via the exponential factor of the intensity of Rayleigh scattering. The study adopted two approaches of experimental and theoretical investigations, while two sets of dye sensitive solar cells (DSCs) were employed. One set of DSCs (crude) had an organic light scattering layer attached while the second (hexane) set was without the light scattering layer. The outcome of the experiment revealed a significant increase in photovoltaic performance of DSCs which had an improvised scattering layer. The short circuit current (I sc) of P.macrophylla B. crude was 64.7% higher than that of the hexane DSCs, the open circuit voltage (V oc) of the crude DSC was more than 50% greater than the hexane DSCs. Although, hexane DSCs had a better fill factor (ff), the output performance of the crude DSCs was thrice that recorded by hexane DSCs. The implication of this study is that, theoretical models can be used for simulating optimal angles of incident in DSCs which can be maximized for higher output in further studies.

Cogent Physics

Titanium oxide is as ancient in age as our planet but its use for photoanode is more recent. It e... more Titanium oxide is as ancient in age as our planet but its use for photoanode is more recent. It exists naturally as rutile (the second most abundant), anatase and brookite ores. The anatase several metastable states trigger diverse spectral responses with Magnifera Indica Linn. (M.indica L) dye as it is synthesized with an N719 dye grown on its matrix. Facile doctor blade method and high temperature sintering at 723 K were used in fabrication. Doping of titanium oxide in effect lowers the band gap of TiO 2 for photo-excitation caused by a bathochromic shift and simultaneously decreases the rate of recombination in photogenerated electron-hole pairs. This study explored the visible light induced photocatalytic action of doped M.indica L DSSC towards reduction of titanium oxide bandgap. The SEM micrographs reveal the molecular interactions and the interplay as electrolytes percolate the intricate N719 dye/Titania framework. Detailed analysis stem from comparison of M.indica L crude faction and the batch separated faction using FTIR spectroscopy. The absorbance peak, rates of reaction and % transmittance identify the particular chromophores responsible for the reaction. Result shows the batch-separated hexane faction approximately 1000 times more efficient than its crude faction although the ff of the crude was only about twice that of the hexane faction. The optical study showed that doping ions lead to an increase in the absorption edge wavelength, and a decrease in the band gap energy of TiO 2 ABOUT THE AUTHORS Temitope Abodunrin is a keen researcher on materials science and specializes in dye-sensitized solar cells (DSSCs). Her objective is to solve the challenge of irregular power supply in the developing world. Thus her research interest has focused on several works on improving the optimal performance of DSSCs. She is a member of faculty at the Covenant University, Nigeria where she lectures and researches. She has several publications on her subject area and she continues to explore and share her views both scientifically and socially as a mentor. She is currently rounding up her Ph.D in Renewable Energy Physics at Covenant University. Her hobby includes reading, writing, thinking and singing.

Heliyon, 2018

A new strategy for evaluating the efficiency of Dye-sensitized Solar Cell (DSC) employed in this ... more A new strategy for evaluating the efficiency of Dye-sensitized Solar Cell (DSC) employed in this study was to introduce a device stabilizer which also functioned as an external load. This aim was accomplished through computations of efficiency of different DSCs based on n-Mosfet transistor. Transistor Z44 mosfet's impact on the DSC systems was to significantly moderate the effect of two vital components namel; the photoanodes and electrolyte sensitizers. The outcome of the Z44 mosfet incorporation inside the DSC was a synchronization in photovoltaic spectral responses thereby, minimizing the common limitations of DSCs such as dye synergy, redox kinematics, photophysics and roughness factor which is not restrictive to N719 dyes. This study presents the results of indium-doped tin oxide (ITO) conducting glass doped DSCs with different electrolytes enhanced with a transistor mosfet; short-circuit current density (Isc) of 0.104 A cm−2, open-circuit voltage (Voc) of 240.6 mV, efficiency of 0.9 % and a fill factor of 0.12 obtained under 1 atmospheric air mass conditions. The implication of this result is possible reproducibility and modelling of T. daniellii Mosfet DSC based on the comparative analysis of the output performance of T. daniellii DSC on TiO2 and ZnO photoanode. This also gives impetus for further scientific inquiry.

Data in Brief, 2018

In this work, data on the effect of porphyrin characteristic of UV/VIS absorption of Thaumatococc... more In this work, data on the effect of porphyrin characteristic of UV/VIS absorption of Thaumatococcus daniellii (T. daniellii) dye-sensitized solar cells sensitized with different electrolytes were presented. The influence of dopants from 1 g/100 ml electrolyte: distilled water and applied time difference of 3 min is observed on the photovoltaic characteristics and performance of the deposited thin film. The output efficiency and incident photon to conversion efficiency of T. daniellii dye-sensitized solar cells was acquired and could be further used as a model for designing dye-sensitized solar models as substitute for silicon solar cells

Over the years, scientific computing has contributed immensely to computational mathematics. Math... more Over the years, scientific computing has contributed immensely to computational mathematics. Mathematica computer programming codes is known to provide computation and quick results. This research article is specifically built to generate Mathematica computer programming codes of exponentially fitted concurrent Milne's device (EFCMD) for solving special problems. Exponentially fitted concurrent Miln device is formulated via collocation/interpolation with power series as the approximate solution. Analyzing the EFCMD will produce the main local truncation error (MLTE) after showing the order, results were shown to demonstrate the functioning of Mathematica programming codes of EFCMD for resolving special problems at some selected bounds of convergence. The finished results were obtained with the assistance of Mathematica 9 kernel. Numerical results display that EFCMD do better than existing methods in terms of the maximum errors in the least studied bound of convergence as a result of varying/designing a suitable pace size, ascertain bound of convergence and error control.

IOP Conference Series: Materials Science and Engineering, 2021

Dye-sensitized solar cells (DSCs)as photovoltaics have been subject of intensive research in the ... more Dye-sensitized solar cells (DSCs)as photovoltaics have been subject of intensive research in the last two decades owing to their outstanding features of relative thermal stability, low cost, optical tunability, ability to operate under conditions of poor lighting, and environment friendliness as such, they offer a promising substitute for conventional monocrystalline silicon solar cells. Their poor output efficiency has been incessantly associated with grain boundaries, good quality films are associated with lower recombination decays. and it has been claimed that grain boundaries have a negligible influence on performance. We used microscopy interrelated with scanning electron microscopy to resolve spatially the recombination dynamics from organic films of Murraya Koenigii. Stoichiometric organic films, varied in different grains even for the same film. In regions where grain boundaries were dimmer, nonradiative decay occurred faster. Ultraviolet spectroscopy showed positive correl...

2022 5th Information Technology for Education and Development (ITED)

IOP Conference Series: Earth and Environmental Science, 2021

Global warming is sketching the isobars on weather maps in a different way, owing to new patterns... more Global warming is sketching the isobars on weather maps in a different way, owing to new patterns and their climatic imprint. Climatological reports have shown that atmospheric pressure fluctuations in the past five decades has strong affiliations with human stimulus. Any infinitesimal change in air pressure could produce a dramatic climatic effect, such as wind, precipitation, diurnal perturbations and storms. Pressure in air is the pointing device for atmosphere’s circulation, and consequently, determines how humidity circulates. Progressive studies on air pressure from both experimental and theoretical sources have corroborated with each other. The potential for atmospheric pressure is a function of the individual sum of oxygen, carbondioxide, water vapor, nitrogen, and noble gases in air. Although, it is difficult to predict the life span of these atmospheric gases, we cannot assume that the abundance of either of these gases has remained constant over geologic time. This study ...

IOP Conference Series: Earth and Environmental Science, 2021

We investigate the influences of photoanode on light scattering and absorption in a dye-sensitize... more We investigate the influences of photoanode on light scattering and absorption in a dye-sensitized solar cell (DSSC). N719 dye on a monolayer anode of TiO2 film and ZnO film, are compared in terms of their photovoltaic conversion efficiency. Doctor blade application and high temperature sintering of photoanode assemblage on indium doped tin oxide glass was adopted for preparation of the two photoanodes. The optical density of the interfacial layer relative to the photogenerated carriers is determined by absorption of ionic electrolytes. The outcome obtained with different photosensitizing effect of organic T.danielliimolecules on DSSCs showed a wide disparity, the highest Voc was recorded with Br− with 500 mV and 79 mV respectively for TiO2 and ZnO photoanode respectively. Three important morphological characterization techniques were used, scanning electron microscopy (SEM) with energy dispersive spectrum (EDS), Electron shell occupancy and Entropy were discussed in detail with res...

IOP Conference Series: Earth and Environmental Science, 2021

Every living or non-living thing has its unique temperature consequent of absorption of electroma... more Every living or non-living thing has its unique temperature consequent of absorption of electromagnetic radiation, light. The source of this molecular kinetic is Solar energy incident on Earth’s surface, the sole supplier of life on the planet. This phenomenon markedly determines the climatic conditions in our habitat. Atypical of previous much-required characteristic balance in nature, myriads of surface processes, ranging from evaporation, photosynthesis and even terrestrial carbon uptake effects are becoming altered in nature. These effects on long-term timing of events defines global warming, it distinguishes the diurnal from seasonal course of surface temperatures and shortwave radiation which contains larger quantity of energy and longwave radiation which holds less amount of energy. Earth’s emitted longwave radiation, also has major practical implications on solar energy technologies, agricultural productivity, profound environmental, societal, and economic implications. Ther...

Cogent Engineering, 2019

as soon as possible after acceptance. Copyediting, typesetting, and review of the resulting proof... more as soon as possible after acceptance. Copyediting, typesetting, and review of the resulting proof will be undertaken on this manuscript before final publication of the Version of Record (VoR). Please note that during production and pre-press, errors may be discovered which could affect the content.

Journal of Physics: Conference Series, 2017

Dye-sensitized solar cells (DSSCs) have acquired great prominence as favourable low-cost photovol... more Dye-sensitized solar cells (DSSCs) have acquired great prominence as favourable low-cost photovoltaics due to their ease of fabrication, all-year-availability, ease of obtaining raw materials and adjustable optical properties like transparency and colour. These advantages coupled with the ability to work under poor lighting makes them a suitable candidate for next generation of research. In this research, C.acuminata-sensitized photo anodes play an important role for achieving high performance since the porous metal oxide films provide a large specific surface area for dye loading and the possibility to extend the absorption threshold of past studies of sensitizers. The doctor blade method and high-temperature sintering were some of the methods used in the fabrication of the photo anode. A study of the performance of the C.acuminata-DSSCs with four different electrolyte sensitizers based on iodide redox mediator is determined. The result is DSSCs that exhibit a maximum power output of 39.37 W, fill factor of 0.7 and a power conversion efficiency of 0.6% under unfavourable sunlight intensity conditions and photo-degradation of about 37.5 % in absorbance after 425 suns.

IOP Conference Series: Earth and Environmental Science, 2021

This study appraises anticipated vicissitudes to surface wind characteristics from 1980-2018 in I... more This study appraises anticipated vicissitudes to surface wind characteristics from 1980-2018 in Ikogosi South-Western Nigeria. Changes in wind speeds at regional and global levels are signals of global warming. A concern about climate change has been a major driving force for the speedy expansion experienced in wind energy projects. Yearly investigation of wind speed disguises seasonal variation in predictive planning. At times, these changes fluctuate across seasons in some zones. The Inter-governmental Panel on Climate Change (IPCC) gave a proponent for long-term changes in the large-scale atmospheric circulation. In effect, observed changes such as poleward shifts and reinforcement of westerly winds will likely be promoted. Projected changes to annual wind speed display altitudinal variability compared to seasonal and annual mean wind speed. An evaluation of wind changes at specific locations is therefore necessary for site-specific application. This paper presents experience at ...

IOP Conference Series: Earth and Environmental Science, 2018

Materials Sciences and Applications, 2015

A new strategy for evaluating the efficiency of Dye-sensitized Solar Cell (DSC) employed in this ... more A new strategy for evaluating the efficiency of Dye-sensitized Solar Cell (DSC) employed in this study was to introduce a device stabilizer which also functioned as an external load. This aim was accomplished through computations of efficiency of different DSCs based on n-Mosfet transistor. Transistor Z44 mosfet’s impact on the DSC systems was to significantly moderate the effect of two vital components namel; the photoanodes and electrolyte sensitizers. The outcome of the Z44 mosfet incorporation inside the DSC was a synchronization in photovoltaic spectral responses thereby, minimizing the common limitations of DSCs such as dye synergy, redox kinematics, photophysics and roughness factor which is not restrictive to N719 dyes. This study presents the results of indiumdoped tin oxide (ITO) conducting glass doped DSCs with different electrolytes enhanced with a transistor mosfet; short-circuit current density (Isc) of 0.104 A cm , open-circuit voltage (Voc) of 240.6 mV, efficiency of...

Heliyon, 2020

Dangerous environmental consequences and market unpredictability of fossil fuels have necessitate... more Dangerous environmental consequences and market unpredictability of fossil fuels have necessitated the need for sustainable large-scale production of biofuel in Nigeria. Unrefined palm oil (UPO) is a significant product of commercially available oil palm plants in the country. This study experimentally investigates the production of biodiesel from refined, bleached and deodorised (RBD) palm olein extracted from UPO obtained from batch reactors. The transesterification process of the RBD palm olein with methanol and in the presence of potassium hydroxide (KOH) catalyst produced biodiesel with a 62.5% yield, thus confirming its feasibility for mass production. The derived biodiesel has properties equivalent to ASTM D792 standard for biodiesel fuels.

Authorea, 2020

This study is considered to formulate Mathematica pseudocodes for implementing block Adams family... more This study is considered to formulate Mathematica pseudocodes for implementing block Adams family (MPIBAF). An idea
multinomial basis function approximant will be utilized to process the interpolation and collocation methods. A special block Adams family in form of block Adams-Bashforth and Block Adams-Moulton methods will be developed via interpolation and
collocation method to foster the principal local truncation error thereby bringing into existence the convergency limits. The application of Mathematica pseudocodes will be processed on some applied math problems in a parallel manner with each processor depending on one another. The computable results will be produced via a compiled Mathematica pseudocode in a gradual manner. In addition, technical computation supersedes manual computation as demonstrated by the results of the numerous gains such as ease of computable processes and structures, better accuracy and quicker convergency.

Journal of Physics: Conference Series

Energy is a requirement for daily existence and a necessity for driving all technology. Thus, ind... more Energy is a requirement for daily existence and a necessity for driving all technology. Thus, indices for generating energy will always be a valid reason for research. It therefore stands to reason that; numerous experimental effort has been devoted to the quest of energy generation. This quest has witnessed a lot of progression, newer innovations being an improvement over older editions. Recent energy studies have shifted its focus from dominant monocrystalline silicon solar cells to organic material sources. This is in the wake of the high expenses incurred in installation of any silicon solar technology. Although the economy of scale applies to increased use of silicon panels, it does not delete the looming future threat of disposal of expired silicon solar panels. This brings to fore, a need for an energy substitute that possesses the salient attributes of monocrystalline silicon solar cells without the limitations. Amongst all the alternatives, the low cost and environmentally benign dye-sensitized solar cells (DSCs) has remained prominent. Other desirable characteristics of dye-sensitized solar cells is all-year availability of raw materials, capacity to perform under low diffuse light conditions, ability to withstand extreme conditions contrary to their silicon counterparts are sterling qualities which necessitate detailed enquiry into dye-sensitized solar technology. In spite of these excellent properties, wide adoption of DSCs is limited by its poor output efficiency relative to monocrystalline silicon solar cells. The significance of this research is thus to investigate optical spectral responses of S.Anisatum dye-sensitized solar cells with an objective to analyze its photovoltaic output and prospect for micro-energy production. Preliminary phytochemical analysis portends S.Anisatum dye as rich in phenols. UV/VIS spectroscopy reveals a porphyrin characteristic absorbance. This research corroborates previousstudies such as photovoltaic output of B.spectabilis DSCs to different electrolytes. The spectral responses revealed 0.065 mA, 140 mV, 5.32 X 10-6 W and 0.86 % respectively as I sc , V oc , P max and ƞ highest output value. Although this result is comparatively low to monocrystalline silicon panels, it conforms with existing standard porphyrin efficiency. This study provides impetus for further studies of S.Anisatum DSCs co-sensitization with other dyes and finds application in modelling of material of synthetic origin.

Procedia Manufacturing, 2018

(Magnifera indica Linn.) leaf dye as dye sensitizer for solar cells. Unlike previous approaches, ... more (Magnifera indica Linn.) leaf dye as dye sensitizer for solar cells. Unlike previous approaches, it employed batch-separated M.indica L. to sensitize two groups of dye-sensitized solar cells (DSCs). Parameters such as short circuit current (Isc), open circuit
voltage (Voc), maximum power (Pmax), fill factor (ff), incident photon to conversion efficiency (IPCE) and output efficiency (ƞ) were used to determine the outcome of the M.indica L. DSCs. The doctor blade method and high temperature sintering at 450 0C
was used in the preparation of both photoanodes. Photovoltaic results reveal DSCs with a higher efficiency of 4.75 x 10-3 % in crude M.indica L. than 0.07 x 10-3 % for batch separated hexane faction of M.indica L. under same conditions of standard air mass. Remarkably, the hexane M.indica L.DSC recorded larger values of Isc and Voc. The significance of this result is that crude M.indica L DSCs are more affordable, have a facile production process and is an ecologically safe alternatives to silicon solar
cells. Although the efficiencies are comparatively low, further research with a solar simulator and co-sensitization with other dyes is recommended for better outcome.

Procedia Manufacturing

The study demonstrates the impact that maximum light-scattering effect has on negligible amount o... more The study demonstrates the impact that maximum light-scattering effect has on negligible amount of P.macrophylla B. dye. It investigated the influence of particle size on intensity via the exponential factor of the intensity of Rayleigh scattering. The study adopted two approaches of experimental and theoretical investigations, while two sets of dye sensitive solar cells (DSCs) were employed. One set of DSCs (crude) had an organic light scattering layer attached while the second (hexane) set was without the light scattering layer. The outcome of the experiment revealed a significant increase in photovoltaic performance of DSCs which had an improvised scattering layer. The short circuit current (I sc) of P.macrophylla B. crude was 64.7% higher than that of the hexane DSCs, the open circuit voltage (V oc) of the crude DSC was more than 50% greater than the hexane DSCs. Although, hexane DSCs had a better fill factor (ff), the output performance of the crude DSCs was thrice that recorded by hexane DSCs. The implication of this study is that, theoretical models can be used for simulating optimal angles of incident in DSCs which can be maximized for higher output in further studies.

Cogent Physics

Titanium oxide is as ancient in age as our planet but its use for photoanode is more recent. It e... more Titanium oxide is as ancient in age as our planet but its use for photoanode is more recent. It exists naturally as rutile (the second most abundant), anatase and brookite ores. The anatase several metastable states trigger diverse spectral responses with Magnifera Indica Linn. (M.indica L) dye as it is synthesized with an N719 dye grown on its matrix. Facile doctor blade method and high temperature sintering at 723 K were used in fabrication. Doping of titanium oxide in effect lowers the band gap of TiO 2 for photo-excitation caused by a bathochromic shift and simultaneously decreases the rate of recombination in photogenerated electron-hole pairs. This study explored the visible light induced photocatalytic action of doped M.indica L DSSC towards reduction of titanium oxide bandgap. The SEM micrographs reveal the molecular interactions and the interplay as electrolytes percolate the intricate N719 dye/Titania framework. Detailed analysis stem from comparison of M.indica L crude faction and the batch separated faction using FTIR spectroscopy. The absorbance peak, rates of reaction and % transmittance identify the particular chromophores responsible for the reaction. Result shows the batch-separated hexane faction approximately 1000 times more efficient than its crude faction although the ff of the crude was only about twice that of the hexane faction. The optical study showed that doping ions lead to an increase in the absorption edge wavelength, and a decrease in the band gap energy of TiO 2 ABOUT THE AUTHORS Temitope Abodunrin is a keen researcher on materials science and specializes in dye-sensitized solar cells (DSSCs). Her objective is to solve the challenge of irregular power supply in the developing world. Thus her research interest has focused on several works on improving the optimal performance of DSSCs. She is a member of faculty at the Covenant University, Nigeria where she lectures and researches. She has several publications on her subject area and she continues to explore and share her views both scientifically and socially as a mentor. She is currently rounding up her Ph.D in Renewable Energy Physics at Covenant University. Her hobby includes reading, writing, thinking and singing.

Heliyon, 2018

A new strategy for evaluating the efficiency of Dye-sensitized Solar Cell (DSC) employed in this ... more A new strategy for evaluating the efficiency of Dye-sensitized Solar Cell (DSC) employed in this study was to introduce a device stabilizer which also functioned as an external load. This aim was accomplished through computations of efficiency of different DSCs based on n-Mosfet transistor. Transistor Z44 mosfet's impact on the DSC systems was to significantly moderate the effect of two vital components namel; the photoanodes and electrolyte sensitizers. The outcome of the Z44 mosfet incorporation inside the DSC was a synchronization in photovoltaic spectral responses thereby, minimizing the common limitations of DSCs such as dye synergy, redox kinematics, photophysics and roughness factor which is not restrictive to N719 dyes. This study presents the results of indium-doped tin oxide (ITO) conducting glass doped DSCs with different electrolytes enhanced with a transistor mosfet; short-circuit current density (Isc) of 0.104 A cm−2, open-circuit voltage (Voc) of 240.6 mV, efficiency of 0.9 % and a fill factor of 0.12 obtained under 1 atmospheric air mass conditions. The implication of this result is possible reproducibility and modelling of T. daniellii Mosfet DSC based on the comparative analysis of the output performance of T. daniellii DSC on TiO2 and ZnO photoanode. This also gives impetus for further scientific inquiry.

Data in Brief, 2018

In this work, data on the effect of porphyrin characteristic of UV/VIS absorption of Thaumatococc... more In this work, data on the effect of porphyrin characteristic of UV/VIS absorption of Thaumatococcus daniellii (T. daniellii) dye-sensitized solar cells sensitized with different electrolytes were presented. The influence of dopants from 1 g/100 ml electrolyte: distilled water and applied time difference of 3 min is observed on the photovoltaic characteristics and performance of the deposited thin film. The output efficiency and incident photon to conversion efficiency of T. daniellii dye-sensitized solar cells was acquired and could be further used as a model for designing dye-sensitized solar models as substitute for silicon solar cells