Modulation on Electrostatic Potential of Passivator for Highly Efficient and Stable Perovskite Solar Cells

• DOI: 10.1002/adfm.202213123
• Publication Date: 2023-05-12T07:37:40Z
• Authors: Hang Su; Jing Zhang; Yingjie Hu; Yuying Yao; Xinxin Zheng; Yutong She; Binxia Jia; Lili Gao; Shengzhong (Frank...
• Keywords: Passivation

Abstract The perovskite layer contains a large number of charged defects that seriously impair the efficiency and stability solar cells (PSCs), thus it is essential to develop an effective passivation strategy heal them. Based on theoretical calculations, found enhancing electrostatic potential passivators can improve effect adsorption energy between passivators. Herein, modulation (EPM) developed design for highly efficient stable PSCs. With EPM strategy, 1‐phenylethylbiguanide (PEBG) 1‐phenylbiguanide (PBG) are designed. It charge distribution phenyl‐ phenylethyl‐ substituent biguanide significantly enhanced. N atom directly bonding phenyl group shows larger positive than phenylethyl group. modulated makes PBG bind stronger with surface. EPM, champion 24.67% realized device retain 91.5% its initial PCE after ≈1300 h. promising which provides principle passivator allows be controllable, may advance further optimization application toward commercialization.