Enhancing the Stability of Perovskite Solar Cells through an Iodine Confining Strategy,ACS Energy Letters

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Enhancing the Stability of Perovskite Solar Cells through an Iodine Confining Strategy
ACS Energy Letters ( IF 19.3 ) Pub Date : 2023-08-18 , DOI: 10.1021/acsenergylett.3c01330
Hui Yang ₁ , Xiaodong Li ₁ , Xuemin Guo ₁ , Chunyan Lu ₁ , Haobo Yuan ₁ , Acan Liu ₁ , Wenxiao Zhang ₁ , Junfeng Fang ₁

Affiliation

One big challenge limiting the stability of perovskite solar cells (PSCs) is that iodine species produced in perovskite tend to diffuse and escape from PSCs, accelerating perovskite decomposition and destroying other functional layers as well. Motivated by the idea of iodine confinement in lithium–iodine batteries, here an iodine confining strategy is proposed to fabricate stable PSCs by incorporating poly(2-vinylpyridine) (P2VP) into the perovskite film. P2VP can effectively bond with the iodine product from perovskite decomposition to inhibit its diffusion and volatilization from PSCs, thus suppressing perovskite decomposition and device degradation. The resulting devices show an efficiency of 22.97% with good stability in inverted PSCs, retaining 90.9% of the initial efficiency after 85 °C for 750 h. In addition, operational stability is also greatly improved, and 90.0% of its initial efficiency is retained after MPP tracking for 1000 h.

中文翻译：

通过碘限制策略增强钙钛矿太阳能电池的稳定性

限制钙钛矿太阳能电池（PSC）稳定性的一大挑战是钙钛矿中产生的碘物质往往会扩散并从PSC中逸出，加速钙钛矿分解并破坏其他功能层。受锂碘电池中碘限制的想法的启发，本文提出了一种碘限制策略，通过将聚（2-乙烯基吡啶）（P2VP）掺入钙钛矿薄膜中来制造稳定的PSC。P2VP可以有效地与钙钛矿分解的碘产物结合，抑制其在PSCs中的扩散和挥发，从而抑制钙钛矿分解和器件退化。所得到的器件在倒置 PSC 中表现出 22.97% 的效率和良好的稳定性，在 85 °C 750 小时后保留了 90.9% 的初始效率。此外，

更新日期：2023-08-18

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