Impact of Anion Impurities in Commercial PbI2 on Lead Halide Perovskite Films and Solar Cells

被引：13

作者：

Senevirathna, Dimuthu C. ^{[1
]}

Yu, Jae Choul ^{[1
]}

Peiris, T. A. Nirmal ^{[1
]}

Li, Bin ^{[1
]}

Michalska, Monika ^{[1
]}

Li, Hanchen ^{[1
]}

Jasieniak, Jacek J. ^{[1
]}

机构：

[1] Monash Univ, ARC Ctr Excellence Exciton Sci, Dept Mat Sci & Engn, Melbourne, Vic 3800, Australia

来源：

ACS MATERIALS LETTERS | 2021年 / 3卷 / 04期

基金：

澳大利亚研究理事会;

关键词：

KINETICS; COST;

D O I：

10.1021/acsmaterialslett.1c00098

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Batch-to-batch variability of commercial PbI2 precursors, even with metal purity levels of >99.99%, is a major limitation toward achieving intra- and interlab reproducibility of lead halide-based perovskite solar cells. This work identifies that Pb(OH)I is the primary impurity that causes these adverse issues. Through a systematic investigation into the role of synthesized Pb(OH)I within Cs-0.05(FA(0.85)MA(0.15))(0.95)Pb(I0.85Br0.15)(3) perovskite films and solar cells, it is shown that this impurity induces segregated PbI2 and delta-FAPbI(3) phases and reduces the ensuing solar cell performance characteristics. To avoid these issues, a facile, high-yield, remediation process amendable to any PbI2 precursor batch is introduced. Through its use, reliably high performing metal halide perovskite solar cells are achieved.

引用

页码：351 / 355

页数：5