The progress and efficiency of CsPbI2Br perovskite solar cells

Abstract

In recent years, inorganic halide perovskites have attracted significant attention in the field of photovoltaics (PVs) because of their excellent intrinsic thermal stability and promising theoretical power conversion efficiency (PCE). Since the pioneering study reported in 2016, the PCE of CsPbI₂Br inorganic perovskite solar cells (IPSCs) has rapidly exceeded 17%. CsPbI₂Br IPSCs show great potential as top cells of tandem PV devices and have become one of the most compelling research hotspots in the PV field. Herein, we systematically summarize the latest progress on the CsPbI₂Br inorganic perovskite for PV applications. High-quality perovskite films and efficient CsPbI₂Br PV devices can be prepared by optimizing the deposition process, regulating the crystal growth, composition engineering, and building a better interface contact. Consequently, the synergistic effect of these strategies can significantly enhance the stability and efficiency of CsPbI₂Br IPSCs. Furthermore, we highlight the influence and mechanism of crystallization/interface engineering on high-quality CsPbI₂Br films and high-performance PV devices. Based on the careful study and analysis of the results achieved, some promising technologies to achieve more stable and efficient PV devices and realize their commercialization using inorganic halide perovskites will be discussed.