Humidity-Assisted Chlorination with Solid Protection Strategy for Efficient Air-Fabricated Inverted CsPbI3 Perovskite Solar Cells,ACS Energy Letters

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Humidity-Assisted Chlorination with Solid Protection Strategy for Efficient Air-Fabricated Inverted CsPbI3 Perovskite Solar Cells
ACS Energy Letters ( IF 19.3 ) Pub Date : 2021-09-23 , DOI: 10.1021/acsenergylett.1c01817
Sheng Fu _{1,

2,

3} , Wenxiao Zhang ₂ , Xiaodong Li ₂ , Jianming Guan ₁ , Weijie Song _{1,

3} , Junfeng Fang _{1,

2,

3}

Affiliation

Humidity-assisted chlorination with solid protection via 1,2-bis(chlorodimethylsilyl)ethane (Si–Cl) incorporation is demonstrated as an effective strategy to address water erosion for efficient air-fabricated inverted CsPbI₃ perovskite solar cells (PSCs). Si–Cl molecules can rapidly react with water to reduce moisture erosion during deposition in air. In addition, the hydrolysis production of hydrogen chloride (HCl) can chlorinate CsPbI₃ while the spontaneous polymerization of 1,2-bis(hydroxydimethylsilyl)ethane (Si–OH) builds a solid protection, which would improve the crystallization and phase stability of CsPbI₃. Therefore, a champion efficiency of 18.93% with high open-circuit voltage of 1.176 V is achieved, which is the highest efficiency among the inverted inorganic PSCs. Furthermore, the moisture tolerance of both the CsPbI₃ films and air-fabricated PSCs gets significant improvement. In addition, the nonencapsulated device shows good operational stability without efficiency drop after 1 sun illumination at 65 °C for 900 h.

中文翻译：

用于高效空气制造的倒置 CsPbI3 钙钛矿太阳能电池的具有固体保护策略的湿度辅助氯化

通过掺入 1,2-双（氯二甲基甲硅烷基）乙烷 (Si-Cl) 进行固体保护的湿度辅助氯化被证明是解决高效空气制造倒置 CsPbI ₃钙钛矿太阳能电池 (PSC)水侵蚀的有效策略。Si-Cl 分子可以与水快速反应，以减少在空气中沉积过程中的水分侵蚀。此外，氯化氢 (HCl) 的水解产生可以氯化 CsPbI _3，而 1,2-双（羟基二甲基甲硅烷基）乙烷 (Si-OH) 的自发聚合建立了固体保护，这将改善 CsPbI 的结晶和相稳定性₃. 因此，在 1.176 V 的高开路电压下实现了 18.93% 的效率，这是反转无机 PSC 中效率最高的。此外，CsPbI ₃薄膜和空气制造的 PSC的耐湿性得到显着改善。此外，未封装的器件在 65°C 下 1 次日光照射 900 小时后显示出良好的运行稳定性，且效率没有下降。

更新日期：2021-10-08

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