Hysteresis-less inorganic CsPbI2Br metal halide perovskite optoelectronic devices with high open circuit voltage = Hysteresis-less inorganic CsPbI2Br metal halide perovskite optoelectronic devices with high open circuit voltage

다국어 초록 (Multilingual Abstract)

Although organic/inorganic hybrid metal halide perovskite solar cells exhibit high power conversion efficiency over 25 % at 1 sun, they still have weak thermal stability to find commercial applications such as building integrated photovoltaics, vehicle integrated photovoltaics, and tandem devices. Therefore, all inorganic metal halide perovskite solar cells have been of great interest as promising alternative to solve such weak thermal stabilities of hybrid metal halide perovskites. Here, we would like to report on high-performance and hysteresis-less mesoscopic CsPbI₂Br perovskite solar cells by adapting hole-transporting materials (HTMs) with controlled highest occupied molecular orbital (HOMO) values. We obtained open-circuit voltage of 1.31 V and power conversion efficiency of 14.86% with exhibiting ~10 % degradation under continuous 1 sun light soaking at 85 °C for 1000 h.