Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Publication date: 1st March 2014
Dye-sensitized solar cells have attracted significant attention as an appealing alternative to conventional semiconductor photovoltaic devices, promising to offer a solution to low-cost large-area photovoltaic applications. DSSCs are fabricated from cheap, easily processable materials, deriving their competitive performance from judicious molecular design and control of nanoarchitecture. In these devices a solid hole-transporting material could be employed to replace the liquid redox electrolyte which is responsible for the dye regeneration and hole transfer to the counter electrode. Significant advances in overall device performance were realized using this approach during recent years. [1] However, long-term device performance is still a serious problem on the road to technology commercialization.
One of the most popular hole transporting materials used in dye-sensitized solar cells including perovskite ones is spiro-MeO-TAD. Devices, constructed using this material, demonstrate very good efficiencies, however, over time performance degrades drastically. Herein we present new purpose-built hole transporting materials developed after investigating the causes of decrease in performance of spiro-MeO-TAD-based solar cells.
This research was supported by the BASF SE.
Lifetime of the tested devices
[1] Hodes, G. Perovskite-based solar cells. Science 2013, 342, 317-318.
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