Impact of Anion Impurities in Commercial PbI2 on Lead Halide Perovskite Films and Solar Cells,ACS Materials Letters

当前位置： X-MOL 学术 › ACS Mater. Lett. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Impact of Anion Impurities in Commercial PbI2 on Lead Halide Perovskite Films and Solar Cells
ACS Materials Letters ( IF 9.6 ) Pub Date : 2021-03-09 , DOI: 10.1021/acsmaterialslett.1c00098
Dimuthu C. Senevirathna ₁ , Jae Choul Yu ₁ , T. A. Nirmal Peiris ₁ , Bin Li ₁ , Monika Michalska ₁ , Hanchen Li ₁ , Jacek J. Jasieniak ₁

Affiliation

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_0.85MA_0.15)_0.95Pb(I_0.85Br_0.15)₃ perovskite films and solar cells, it is shown that this impurity induces segregated PbI₂ and δ-FAPbI₃ 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.

中文翻译：

商业PbI ₂中阴离子杂质对卤化钙钛矿铅薄膜和太阳能电池的影响

商用PbI ₂前体的批次间变异性，即使金属纯度> 99.99％，也是实现卤化铅基钙钛矿太阳能电池实验室内和实验室间可重复性的主要限制。这项工作确定Pb（OH）I是导致这些不利问题的主要杂质。通过系统地研究合成的Pb（OH）I在Cs _0.05（FA _0.85 MA _0.15）_0.95 Pb（I _0.85 Br _0.15）₃钙钛矿薄膜和太阳能电池中的作用，表明该杂质诱导了偏析的PbI ₂和δ -FAPbI ₃相变并降低随后的太阳能电池性能特征。为避免这些问题，引入了一种适用于任何PbI ₂前体批次的简便，高产，修复工艺。通过其使用，可获得性能可靠的高性能金属卤化物钙钛矿太阳能电池。

更新日期：2021-04-05

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南