Mediating the Local Oxygen-Bridge Interactions of Oxysalt/Perovskite Interface for Defect Passivation of Perovskite Photovoltaics

Nano-Micro Letters

Hui Jun Lian¹  Bing Ge¹  Ze Qing Lin¹  Haiyang Yuan¹  Shuang Yang¹  Ziren Zhou¹  Yu Hou¹  Hua Gui Yang¹ 

[1] Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, 200237, Shanghai, People’s Republic of China;

关键词: Solar cell;    Lead halide perovskite;    Passivation;    Oxysalt;    Central atom;   

DOI  :  10.1007/s40820-021-00683-7

来源: Springer

【 摘 要 】

tsOxyacid anions (NO3−, SO42−, CO32−, PO43− and SiO32−) were investigated both theoretically and experimentally about their passivation effect on CsPbI2Br perovskite interface.Adjustment of oxysalt layer thickness can optimize the surface band position that could be beneficial for electronic band alignment at perovskite/transport layer interface.Using silicate as a passivator, the CsPbI2Br solar cells achieved a PCE of 17.26% with an open-circuit voltage of 1.36 V. This strategy is also effective for organic-inorganic perovskite solar cells.

【 授权许可】

CC BY