Dye Sensitized Solar Cells Consisting of Metallophthalocyanine Axially Anchored on Metal Oxide Nanoparticles through Metal-O-Metal Linkages-Difference in Photovoltaic Performances between TiO2 and SnO2 Electrode (original) (raw)
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Applied Physics Express, 2010
We report a hybrid dye system, in which two dyes are linked linearly by a metal-O-metal linkage, for dye sensitized solar cells (cell-NcSn-N719). Tin(IV) 2,11,20,29-tetra-tert-butyl-2,3-naphthalocyanine (NcSn) was adsorbed on a SnO 2 surface by a Sn(p)-O-Sn(n) linkage, where Sn(p) and Sn(n) stand for a Sn atom on a Sn nanoparticle surface and that at the center of NcSn, respectively. cis-Diisothiocyanato-bis(2,2 0-bipyridyl-4,4 0dicarboxylato)ruthenium(II) bis(tetrabutylammonium), known as N719, was bonded to NcSn by a-Sn(n)-O-CO-linkage. The incident photon to photocurrent efficiency (IPCE) curve of cell-NcSn-N719 suggested that electrons are injected from both N719 and NcSn to SnO 2 nanoparticles.
Journal of Molecular Structure, 2019
In this study, carboxylic acid terminated Zn(II), Cu(II), Co(II) and Ni(II) phthalocyanine dyes were synthesized using 3-(4-(3,4-dicyanophenoxy)-3methoxyphenyl)acrylic acid. Phthalocyanine dyes were characterized by elemental analysis, FT-IR, UV-Vis, 1 H-NMR and MALDI-TOF MS techniques. The sensitizing abilities of these dye molecules in standard dye-sensitized solar cells (DSSCs) were also investigated as function of sensitizing time (the sensitizing time was varied from 12 to 72 h). Preliminary studies showed that the sensitization time of TiO 2 photoelectrodes has a strong effect on the device performance parameters. Interesting results were obtained for ZnPc sensitized device under optimized conditions. 36 h sensitized ZnPc based device gave a short circuit current density of 18.8 mA.cm-2 , an open circuit voltage of 751 mV, a fill factor of 0.46, corresponding to an overall conversion efficiency of 6.37%. Relatively low photovoltaic conversion efficiency for 36 h CoPc sensitized device was obtained which can be attributed to redox active nature of Co(II) metal ion.
Synthetic Metals, 2009
An iron phthalocyanine with tetra-sulphonated substituents (FeTsPc) was used as photosentizer for the development of dye sensitized nanostructured TiO 2 solar cells. The influence of surface modification (TiO 2 film treated with HCl and HNO 3) and thermal annealing of TiO 2 photo-electrode on the performance of dye sensitized solar cell (DSSC) having structure FTO/TiO 2-FeTsPc/electrolyte/PEDOT:PSS (carbon added)/FTO was investigated through the analysis of current-voltage characteristics under illumination and electrochemical impedance spectra (EIS). The improvement in crystallinity of TiO 2 , decrease in the internal surface area and adsorbed amount of dye and increase in the lifetime of injected electrons upon thermal annealing of TiO 2 photo-electrode affects the photovoltaic properties of DSSC. The increase in power conversion efficiency of DSSC based on nitric acid treatment for the photo-electrode is mainly attributed to the increase in photocurrent. A comparative photovoltaic investigation of DSSCs using HCl-treated TiO 2 photo-electrode, indicates that the HNO 3-treated photo-electrode retards back electron transfer at the interface with electrolyte and increases the amount of dye.
Metal-free organic dyes for TiO2 and ZnO dye-sensitized solar cells
Scientific reports, 2016
We report the synthesis and characterization of new metal-free organic dyes (namely B18, BTD-R, and CPTD-R) which designed with D-π-A concept to extending the light absorption region by strong conjugation group of π-linker part and applied as light harvester in dye sensitized solar cells (DSSCs). We compared the photovoltaic performance of these dyes in two different photoanodes: a standard TiO2 mesoporous photoanode and a ZnO photoanode composed of hierarchically assembled nanostructures. The results demonstrated that B18 dye has better photovoltaic properties compared to other two dyes (BTD-R and CPTD-R) and each dye has higher current density (Jsc) when applied to hierarchical ZnO nanocrystallites than the standard TiO2 mesoporous film. Transient photocurrent and photovoltage decay measurements (TCD/TVD) were applied to systematically study the charge transport and recombination kinetics in these devices, showing the electron life time (τR) of B18 dye in ZnO and TiO2 based DSSCs ...
Introduction to Photovoltaics Chapter 2. Asymmetrical Carbazolium-Based Streptocyanines Chapter 3. Malachite Green Derivatives Chapter 4. General conclusion °C Celsius degree [AS] Surface density of all occupied sites [S] Surface density of all unoccupied sites A Absorbance Å Angström a-Si Amorphous silicon AM Air mass density APCE Absorbed photon-to-current conversion efficiency c Speed of light C concentration CCS Carbon capture and storage CDCA Chenodeoxycholic acid CIGS Copper indium gallium diselenide COP Conférence des parties Cz Carbazole DMPII 1,2-dimethyl-3-propylimidazolium iodide DSSC Dye-sensitized solar cell DFT Density functional theory e !" !
2015
We developed an organic dye sensitized solar cell with TiO2 nanostructures integrated into the photoanode. The sensitizer in this research paper was extracted from flame tree flowers (delonix regia) and pawpaw (carica papaya) leaves respectively. The flame flower was separated from its stalk. Each of the samples was crushed separately via the use of a porcelain mortar and pestle. The samples, each, was filtered and stored in test tubes. The dye is chemically connected to a porous layer of a wide band-gap semiconductor. The DSSC employing the nanocrystalline TiO2 as photoanode shows a short circuit current density of 0.01849 mA/cm 2 , open circuit voltage of 0.525 V, fill factor of 0.520 and a power conversion efficiency of about 0.0051 %.
European Journal of Organic Chemistry, 2010
As new-type donor-acceptor π-conjugated dyes capable of forming a strong interaction between the electron-acceptor moiety of the sensitizers and a TiO 2 surface, fluorescent dye OH11 and pyridinum dye OH12 with a pyridine and pyridinium ring as the electron-accepting group, respectively, have been designed and synthesized as photosensitizers for use in dye-sensitized solar cells (DSSCs). The fluorescent dye OH11 exhibits an absorption band at around 410 nm and a fluorescence band at around 530 nm. On the other hand, the pyridinum dye OH12 shows an absorption maximum at around 560 nm, assigned to a strong intramolecular charge-transfer excitation from the dibutylamino group to the pyridinium [a]