Radical Form of PbI2: A New Defect Passivator for Efficient Perovskite Solar Cells,ACS Applied Materials & Interfaces

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Radical Form of PbI2: A New Defect Passivator for Efficient Perovskite Solar Cells
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-09-24 , DOI: 10.1021/acsami.1c12764
XiuXiu Feng ₁ , Jiyao Wei ₁ , Xiaodong Li ₁ , Wenxiao Zhang ₁ , Xiaoyan Zhao ₁ , Chunyan Lu ₁ , Xuemin Guo ₁ , Junfeng Fang ₁

Affiliation

PbI₂ is a commonly used passivator for defect passivation in perovskite solar cells (PSCs). However, the poor conductivity nature of PbI₂ may limit the further improvement of device performance. Here, we report a radical form of PbI₂ with high conductivity to passivate defects for efficient PSCs through a combination of N,N,N′,N′-tetramethylbenzidine (TMB). When PbI₂ is combined with TMB, 4 orders of magnitude higher conductivity will be achieved owing to the formation of a TMB-PbI₂ radical. As a result, the device performance is impressively increased from 20.48 to 22.63%. In addition, the device stability is also greatly improved and 95% of the initial efficiency is retained after aging at 85 °C for 600 h.

中文翻译：

PbI2 的自由基形式：一种用于高效钙钛矿太阳能电池的新型缺陷钝化剂

PbI ₂是一种常用的钝化剂，用于钙钛矿太阳能电池 (PSC) 中的缺陷钝化。然而，PbI ₂较差的导电性可能会限制器件性能的进一步提高。在这里，我们报告了一种具有高电导率的自由基形式的 PbI ₂，可通过N , N , N ', N '-四甲基联苯胺 (TMB)的组合钝化高效 PSC 的缺陷。当 PbI ₂与 TMB 结合时，由于形成了 TMB-PbI _2，将实现 4 个数量级的高电导率激进的。结果，设备性能从 20.48% 大幅提升至 22.63%。此外，器件稳定性也大大提高，在85℃老化600小时后仍保持95%的初始效率。

更新日期：2021-10-06

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