【摘要】 在低温制备的SnO₂电子传输层（ETLs）和钙钛矿层之间插入KI插层,制备平面钙钛矿太阳电池;研究KI插层对SnO₂ ETLs/钙钛矿吸收层界面的修饰作用及其对钙钛矿薄膜性质和器件性能的影响。研究结果表明,KI插层可促进钙钛矿薄膜的晶粒生长,并提升ETLs/钙钛矿层的界面载流子输运效率;虽然添加KI插层后引入的寄生吸收会造成电池短路电流(J_sc)略微降低,但也会显著提升开路电压(V_oc)和填充因子（FF）,从而使得刚性器件和柔性器件的光电转换效率均得到明显提高,刚性和柔性钙钛矿太阳电池的平均光电转换效分别从17.71%和14.52%提升到18.64%和17.46%。更多还原

【Abstract】 The planar-structured perovskite solar cell was prepared through addition of KI intercalation layer between the SnO₂ electron transport layers（ETLs）/perovskite layer prepared at low temperature. The interfacial modification effect of KI intercalation layer for the SnO₂ ETLs/perovskite layer, and the influences on the properties of perovskite film and the device performance of perovskite solar cells were investigated. The results show that the addition of KI interlayer facilitates the grain growth of perovskite film and thus improves the interfacial carrier transport efficiency at ETLs/perovskite absorber. Herein, the overall performances, especially the power conversion efficiency, for both rigid and flexible solar cells are significantly optimized after the involvement of KI interlayer, mainly due to the improved open-circuit voltage(V_oc) and fill factor（FF）, despite the short-circuit current density(J_sc) slightly decreases. The average power conversion efficiencies of rigid devices and flexible ones increase from 17.71% and 14.52 % to 18.46% and 17.46 %, respectively.更多还原