Improving the stability and performance of Sn-based perovskite solar cells by ultrasonic substrate vibration post treatment
作者单位：University of Michigan-Shanghai Jiao Tong University Joint Institute
会议名称：《第五届新型太阳能电池学术研讨会》
会议日期：2018年
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
关 键 词：Sn-based perovskite solar cells lead-free perovskite solar cells ultrasonic vibration
摘 要：Lead halide perovskite solar cells(PSCs) show highly competitive power conversion efficiency among new generation solar cells. However, there is a concern about their environmental toxicity, which may hamper their practical utilization. As an alternative,less-toxic tin(Sn)-based PSCs have been proposed as a substitute for the Pb-based ***, pure Sn-based PSCs suffer from extreme instability and poor reproducibility, due to heterogeneous Sn perovskite layer, and the easy oxidation of Sn to ***, we propose to utilize ultrasonic substrate vibration post treatment(SVPT) imposed on the wet film of the perovskite layer, to improve the performance and stability of the Sn-based perovskite active layer. The SVPT has worked well on Pb-based *** ongoing results show that the SVPT method contributes to obtaining highly oriented and homogenous growing FASnI grains(Fig. 1), resulting from reduced number of grain boundaries and suppressed tin *** addition, we observed that the SVPT results in improved absorbance of the perovskite layer.