Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV16)
Publication date: 28th March 2016
In dye sensitized solar cells (DSSCs) the processes such as electron injection, charge transport and back electron transfer, on which the efficiency depends, are highly influenced by the electrolyte due to its ability to tune the energetic of the TiO2/dye/electrolyte interface. Thus, use of an appropriate additive in the electrolyte, is certified as powerful strategy to adjust the energy alignment at the TiO2/dye/electrolyte thereby improving the performance of DSSCs. In this work thioacetamide was added in the electrolyte comprising of 0.5 M PMII, 0.05 M I2 and 0.5 M TBP in acetonitrile. It was observed that the thioacetamide addition resulted in significant enhancement of current density from 10.0 to 13.92 mA cm-2, while voltage decreased from 0.70 to 0.66 V. As a result, photovoltaic conversion efficiency increased from 4.77% to 5.51%. Electrochemical impedance analysis confirms that the unusual enhancement in current density with the addition of thioacetamide is due to the positive band edge shift and a reduction in charge recombination. The chemical reaction between thioacetamide and iodine in the electrolyte results in the generation of protons, underlying the positive band edge shift.
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International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
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