Multiple Passivation of Electronic Defects for Efficient and Stable Perovskite Solar Cells,Solar RRL

当前位置： X-MOL 学术 › Solar RRL › 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.)

Multiple Passivation of Electronic Defects for Efficient and Stable Perovskite Solar Cells
Solar RRL ( IF 6.0 ) Pub Date : 2020-09-26 , DOI: 10.1002/solr.202000481
Mingguang Li ₁ , Longsheng Yu ₁ , Ying Zhang ₁ , Huan Gao ₁ , Ping Li ₁ , Runfeng Chen ₁ , Wei Huang _{1,

2}

Affiliation

Electronic defects and grain boundaries of perovskite films will significantly deteriorate both the efficiency and the stability of perovskite solar cells (PSCs), and various methods aimed to reduce these defects are proposed. Herein, an organic solid molecule of pyridinedicarboxylic acid (PDA) with one pyridine and two carboxylic acid groups is used as a passivating agent to cure the defects by regulating the perovskite microstructures in a multiple manner. The defects located at both the surfaces and grain boundaries of polycrystalline MAPbI₃ perovskites are simultaneously passivated through the multiple coordination effects between the used functional groups and uncoordinated Pb²⁺, regardless of the substitution sites of the carboxylic acid and pyridine. Impressively, the PDA‐passivated inverted PSCs achieve remarkably enhanced power conversion efficiencies (PCEs) from 16.43% to nearly 19% and maintain over 90% of its original PCE after 1300 h under an inert environment. These findings indicate that the commercially available PDA molecule emerges as an efficient passivating agent of perovskite defects capable of stimulating the combined effects of the multiple functional groups, which is highly promising for the practical applications of PSCs with both high efficiency and good stability.

中文翻译：

高效且稳定的钙钛矿太阳能电池的电子缺陷的多次钝化

钙钛矿薄膜的电子缺陷和晶界将大大降低钙钛矿太阳能电池（PSC）的效率和稳定性，并提出了各种旨在减少这些缺陷的方法。本文中，具有一个吡啶和两个羧酸基团的吡啶二羧酸（PDA）的有机固体分子用作钝化剂，以通过多种方式调节钙钛矿的微结构来修复缺陷。通过使用的官能团和未配位的Pb ²⁺之间的多重配位效应，可同时钝化位于多晶MAPbI ₃钙钛矿表面和晶界的缺陷。，而与羧酸和吡啶的取代位无关。令人印象深刻的是，通过PDA钝化的反向PSC在惰性环境下运行1300 h后，其功率转换效率（PCE）从16.43％显着提高到近19％，并保持其原始PCE的90％以上。这些发现表明，可商购的PDA分子作为钙钛矿缺陷的有效钝化剂出现，能够刺激多个官能团的组合作用，这对于具有高效率和良好稳定性的PSC的实际应用是高度有前途的。

更新日期：2020-11-06

点击分享查看原文

点击收藏

阅读更多本刊最新论文