摘要： Photovoltaic (PV) technology that directly converts the solar energy into electrical energy, is regarding as one of the most promising utilization technologies of renewable and clean energy sources. Nowadays, developing low-cost and highly efficient PV technology is a hot research topic both for academia and industry. In this context, perovskite solar cells (PSCs) with metal halide perovskites [ABX3, A = CH3NH3+ (MA+), or CH(NH2)2+ (FA+), Cs+; B = Pb2+, Sn2+; X = Cl?, Br?, I?] as light harvesting material, is in the spotlight due to its easy fabrication process and high power conversion efficiency (PCE) [1,2]. To date, the certified PCE has been already pushed up to 25.2% (https://www.nrel.gov/pv/module-efficiency.html), making PSC an auspicious candidate for a new generation of photovoltaics. In future days, how to eliminate the non-essential charge carrier recombination in the device, further push the PCE approaching the Shockley-Queisser theoretical efficiency limit (~35%) and enhance the device stability, will be formidable challenges and the focus in the next stage of research work.