Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV16)
Publication date: 28th March 2016
Dye sensitized solar cells (DSSCs) may become a potential alternative to silicon based solar cells if the current challenges associated with their stability get addressed in the coming years. DSSCs can be fabricated through relatively simple steps and the highest reported efficiency for these cells is 13 %. In DSSCs titania mesoporous film is the heart of the cell as it transfers electrons from adsorbed dye molecule to external circuit through the transparent conducting oxide (TCO). Interparticle connectivity and porosity in the titania films plays important role for achieving higher efficiency in DSSCs. Interparticle neck formation between titania particles is develops during heat treatment of the titania film. The present work reports, study on effect of heat treatment time on the interconnectivity of the titania particles in titania film. Titania nanoparticlate films were prepared by screen printing of titania paste over cleaned FTOs. These films are heat treated at 500oC for different times 30, 60, 90, 120 and 150 minutes. After heat treatment these films were soaked in dye for 24 hours then DSSCs were fabricated and efficiency of DSSCs measured. Electrochemical impendance spectroscopy of these cells and nanoindentation of the heat treated titania films has been carried out to understand the impact of varying titania particle interconnectivity on DSSC performance. Increase of the performance of DSSCs has been observed as heat treatment time increase up to 120 minutes. After further increase in the time of heat treatment performance of DSSCs degrades.
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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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