Solution-based colloidal synthesis of hybrid P3HT:ternary CuInSe2 nanocomposites using A novel combination of capping agents for low-cost photovoltaics (original) (raw)
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Organic-inorganic hybrid material: synthesis, characterization for solar cell application
Journal of Ovonic Research, 2022
We report a hybrid system based on conducting polymer-semiconductor from poly(otoluidine) (POT) doped with camphor sulfonic acid(CSA) and cadmium selenide capped with Tri sodium citrate(CdSe-TSC) by the physical mixing method. The influence of CdSe nanoparticles weight percent on the hybrid thin films have been investigated by means of XRD, FESEM, UV-VIS absorption and photoluminescence spectroscopy (PL) measurements. The main diffraction peaks of POT/CdSe hybrids are analogous to the neat CdSe nanoparticles. The absorption measurement reveals that the interaction between CdSe and POT in the hybrid materials led to the blue shift and broadening of the polaron absorption band. The energy gap has been decreased with an increase in the concentration of CdSe NPs. the PL intensity has been totaly quenched when the tow materials are bring to other. The hybrid nanocomposite material and provides useful evidence apropos the optimum use of CdSe nanoparticles in conductive polymer based optoelectronics.
Prospects of hybrid organic-inorganic photovoltaic solar cells
Conference Paper: 2nd Fotonika-LV Conference “Achievements and Future Prospects”, 23-25 Apr 2017, Riga, Latvia, Book of Abstracts, Ed. A. Ubelis, D. Berzina, Riga: Univ. Latvia, 2017
Today organic-inorganic hybrid (OIH) semiconductor materials are a creative alternative for applications in electronics and photonics, particularly, for photovoltaic (PV) solar cells [1]. The approach is based on the next innovative solutions: (1) use of low-cost bio- or synthetic organic compounds for creating OIH suitable for broad-band sunlight harvesting and PV energy conversion; (2) use of process of molecular self-organization and assembly for OIH growing at room temperature; (3) use of technology of thin film chemical deposition from a colloidal solution; and (4) use of smart technique of differential analysis of functional characteristics for optimization of OIH performance [2, 3]. According to our study of various samples of low-molecular-weight OIH cells fabricated on patterned Si substrates, including its structural, optical and electrical characterisation, such PV cells have the following features: (i) PV efficiency of energy conversation is up to 9% depending on the chemical composition and surface/ interface morphology; (ii) performance of the Si-based OIH of thiamine diphosphate hydrochloride (C12H20Cl2N4O7P2S cocarboxylase or Vitamin B1) for a thin layer of 30 nm and a self-organized net-like surface was found to be the best; (iii) intense optical absorption followed by photoluminescence in the range 400–900 nm, whose spectral distribution and peak have vibrionic origins; and (iv) there is a number of characteristic bands associated to functional groups containing amines NHx(x = 0, 1, 2), carboxamides CON, cyanides CN, hydrocarbons CHx(x = 1, 2, 3), hydroxyl OH, carbonyl CO, etc. Despite the limited understanding of the complex mechanism of charge-carrier transfer in such OIH, the classic model of electron-hole pair generation, charge separation, and recombination proved to be suitable to describe current-voltage characteristics, when the short circuit current Isc is a linear function of energy of irradiation, and the open circuit voltage Voc has a logarithmic dependence of energy followed by saturation. We found that even small changes in the OIH design can lead to essential differences in optical and electrical properties, however a proper technological manipulation can help to optimize the OIH performance to the desired results. Research is in progress. The authors acknowledge support of the EU FP7-PEOPLE-IRSES-2011-204949 NOCTURNAL ATMOSPHERE, FP7-PEOPLE-IRSES-2012-318820 BIOSENSORS-AGRICULT, and National RTD Program NASU “SENSOR TECHNOLOGIES” 2008-2015, Project 1.4.10. References [1] G. Li, R. Zhu, Y. Yang, Polymer solar cells, Nature Photonics 6, 15-161 (2012) [2] T.Ya. Gorbach, P.S. Smertenko, E.F. Venger, Investigation of photovoltaic and optical properties of self-organized organic-inorganic hybrids using aromatic drugs and patterned silicon, Ukr J Phys, 59(6): 601-611 (2014) [3] V. Naumov, P. Smertenko, G. Olkhovik, S. Stepanov, Differential approach and radiation amplification factor, in 73rd Annual Sci. Conf. Univ.Latvia, 6-7 Feb 2015, Riga, Latvia, Book of Abstracts, Ed. A.Atvars, V.Beldavs, A.Ubelis, Riga Photonics Centre Univ.Latvia, p.62 (2015)
PERSONAL ACCOUNT Organic Photovoltaic Materials – Design, Synthesis and Scale- up
2019
This account describes the work of our group in the area of organic photovoltaics in the past six years. The emphasis is on our experiences in the development of the organic materials, their characterization, scale-up and application in devices. We share our insight into the relationship between synthetic methods, molecular properties, bulk material properties and device
Organic Photovoltaic Materials-Design, Synthesis and Scale-Up
Chemical record (New York, N.Y.), 2015
This account describes the work of our group in the area of organic photovoltaics in the past six years. The emphasis is on our experiences in the development of the organic materials, their characterization, scale-up and application in devices. We share our insight into the relationship between synthetic methods, molecular properties, bulk material properties and device performance.
Materials
The continuous increase in the global energy demand deeply impacts the environment. Consequently, the research is moving towards more sustainable forms of energy production, storage and saving. Suitable technologies and materials are fundamental to win the challenge towards a greener and more eco-friendly society. Organic π-conjugated materials, including small molecules, oligomers and polymers are a wide and versatile class of functional materials with great potentiality, as they can be used as active matrixes in the fabrication of lightweight, flexible, cheap and large area devices. Their chemical and physical properties, both at a molecular level and mainly in the solid state, are a result of many factors, strictly related to the conjugated structure and functional groups on the backbone, which control the intermolecular forces driving solid state aggregations. The synthesis, through the molecular design, the choice of conjugated backbone and functionalization, represents the fir...
Concept of Organic Photovoltaics: Operational Principles and Materials
Acta Electrotechnica et Informatica, 2013
Organic molecules possessing a π-conjugated (hetero)aromatic backbone are capable of transporting charge and interact efficiently with light. Therefore, these systems can act as semiconductors in opto-electronic devices similar to inorganic materials. However, organic chemistry offers tools for tailoring materials' functional properties via modifications of the molecular units, opening new possibilities for inexpensive device manufacturing. In this presentation, we discuss exploitation of such organic molecular systems in photovoltaics; the operation, advantages, and limitations of molecular donor-acceptor heterojunction structures.
Connecting the (quantum) dots: towards hybrid photovoltaic devices based on chalcogenide gels
Physical Chemistry Chemical Physics, 2012
CdSe(ZnS) core(shell) aerogels were prepared from the assembly of quantum dots into mesoporous colloidal networks. The sol-gel method produces inorganic particle interfaces with low resistance to electrical transport while maintaining quantum-confinement. The photoelectrochemical properties of aerogels and their composites with poly(3-hexylthiophene) are reported for the first time. Organic solar cells based on conjugated polymers are among the most promising devices for solar energy conversion. The "classical" device consists of a bulk-heterojunction of a polymer-fullerene network, using poly(3-hexylthiophene) (P3HT) and the soluble fullerene derivative [6,6]-phenyl C 61-butyric acid methyl ester (PC 61 BM). The introduction of small alkyl thiol molecules, optimization of solvent conditions, and use of conjugated copolymers with smaller band gaps along with PC 71 BM enabled significant improvements in the efficiency of these devices, reaching ~ 7 %. 1,2 However, bottlenecks such as morphology control, the mismatch with the solar spectrum and stability still persist. The easily tunable optical properties, high extinction coefficients, electron affinity and intrinsic dipole moments of inorganic semiconductor quantum dots (QDs), as well as their potential for multiple exciton generation makes QDs such as CdSe, 3,4 CuInSe 2 , 5 PbS, 6 and PbSe 7 promising alternatives to organic fullerene derivatives in hybrid solar cell devices. The addition of QDs in polymer solar cells should enhance the light-harvesting, thus offering the possibility of higher photocurrents. However, the highest efficiencies achieved for this kind of QD-based solar cells are still around 3 %, 8,9,10,11 mainly due to the poor charge transport properties of the inorganic phase, where transport occurs by hopping
Advanced Materials
Recent research efforts on solution-processed semitransparent organic solar cells (OSCs) are presented. Essential properties of organic donor:acceptor bulk heterojunction blends and electrode materials, required for the combination of simultaneous high power conversion efficiency (PCE) and average visible transmittance of photovoltaic devices, are presented from the materials science and device engineering points of view. Aspects of optical perception, charge generation-recombination, and extraction processes relevant for semitransparent OSCs are also discussed in detail. Furthermore, the theoretical limits of PCE for fully transparent OSCs, compared to the performance of the best reported semitransparent OSCs, and options for further optimization are discussed.