Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Publication date: 1st March 2014
Rapidly improving hybrid organic-inorganic perovskite solar cells represent a promising technology for building integrated photovoltaic applications. Strong absorption characteristics allow for efficient semi-transparent devices through reduced photon absorbing material coverage. In this work micro-patterning techniques were developed that lead to a desired pillar-like formation of perovskite crystals. Several lithography techniques were used to fabricate oxide-templates of electron transporting TiO2 and insulating SiO2 into two-dimensional micro-patterns to fulfil the purpose of coverage controlling scaffolds. We show that solution-processed perovskite domains form within the oxide-pores with controllable thickness. Light transmission paths are created between the perovskite pillars through the oxide walls leading to average visible transmissions of up to 50%. Furthermore we demonstrate that shunting paths can be reduced with the use of an insulating oxide-template leading to improved open circuit voltages and fill factors compared to previous work. Therefore enhanced device performances could be achieved at common application transparencies by utilizing micro-patterned oxide-templates.
Photograph of a micro-patterned, semi-transparent perovskite solar cell.
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