Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV24)
Publication date: 6th February 2024
Hybrid organic-inorganic metal halide perovskites have become one of the dominant semiconductors in photovoltaics due to their attractive properties. These materials are soft yet crystalline mixed ionic-electronic conductors that have unique optoelectronic and optoionic properties. However, they suffer from instability under device operating conditions due to ion migration that leads to device degradation. Several approaches have been established to overcome this issue, including those that incorporate functionalized organic cations that template lower dimensional perovskites with enhanced operational stability. These organic species are usually electronically insulating, limiting their charge transport, and resulting in lower efficiency of the solar cells. There is a need to enhance their functionalities by using (photo)electroactive organic cations that are responsive to external stimuli. We demonstrate the molecular design and synthesis of representative functional organic spacers followed by their implementation in the corresponding layered hybrid perovskites. They are characterized by a combination of techniques to assess their potential in photovoltaics.
G.A. and J.V.M. acknowledge funding from the Swiss National Science Foundation project no. 193174.
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