Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV16)
Publication date: 28th March 2016
Remarkable progress in the development of photovoltaic devices based on hybrid organic–inorganic perovskites shows nowadays more than 20% power conversion efficiencies. However, the AMX3 perovskites (A= Methylammonium, Formamidinium or their mix, M=Lead, and X=I, Br, Cl) suffer from high instability and toxicity. Despite their contribution the materials' superior qualities, stable and benign substitutes are required to replace the volatile organic as well as the toxic lead cations. The ideal replacements should yield stable, environmentally-friendly, inexpensive materials, with comparable properties to the organic and lead-containing perovskites. The main focus of this research is to investigate the all-inorganic, lead-free Cs2SnI6 as an absorber layer for photovoltaic devices. This air-stable perovskite has great potential due to its ideal low bandgap and semiconducting properties, and is implemented and studied as a replacement to the hybrid organic–inorganic perovskites in photovoltaic devices. Moreover, since the Cs2SnI6 is air-stable, it can be synthesized in ambient conditions and the synthesis can be done using several simple low cost methods.