Tuning the A-site cation and X-site anion composition of CH3NH3PbI3 perovskite material for efficient planar perovskite solar cells
作者单位：Institute for Advanced MaterialsSouth China Academy of Advanced OptoelectronicsSouth China Normal University
会议名称：《第六届新型太阳能电池材料科学与技术学术研讨会》
会议日期：2019年
学科分类：07[理学] 08[工学] 070205[理学-凝聚态物理] 080501[工学-材料物理与化学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学]
关 键 词：Cs and SCN additives photoelectric properties performance perovskite solar cell
摘 要：In order to optimize microstructure and improve the photoelectric properties of planar perovskite solar cells(PSCs), the Cs and SCN are selected to tune the A-site cation and X-site anion composition of CHNHPbI material with ABX structure, respectively. The effects of Cs and SCN addition on the microstructure and photoelectric properties of(CHNH)CsPb(ISCN) perovskite films and the performance of PSCs have been systematically investigated. The value of x corresponding to the amount of SCN-has been optimized. At the optimum amount of 0.05, the(CHNH)CsPb(ISCN)(CsSCN) PSC achieve the champion power conversion efficiency(PCE) of 18.78% and average PCE of 17.66%, being much higher than that of the reference PSCs. The results indicate that the obtained CsSCN perovskite film shows the improved microstructure, better local electric properties, the reduced trap density and suppressed charge recombination, resulting in the promoted carrier transfer and improved performance in PSCs.