Enhanced Moisture Stability by Butyldimethylsulfonium Cation in Perovskite Solar Cells.,Advanced Science

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Enhanced Moisture Stability by Butyldimethylsulfonium Cation in Perovskite Solar Cells.
Advanced Science ( IF 14.3 ) Pub Date : 2019-12-13 , DOI: 10.1002/advs.201901840
Bohyung Kim ₁ , Maengsuk Kim ₁ , Jun Hee Lee ₁ , Sang Il Seok ₁

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Many organic cations in halide perovskites have been studied for their application in perovskite solar cells (PSCs). Most organic cations in PSCs are based on the protic nitrogen cores, which are susceptible to deprotonation. Here, a new candidate of fully alkylated sulfonium cation (butyldimethylsulfonium; BDMS) is designed and successfully assembled into PSCs with the aim of increasing humidity stability. The BDMS-based perovskites retain the structural and optical features of pristine perovskite, which results in the comparable photovoltaic performance. However, the fully alkylated aprotic nature of BDMS shows a much more pronounced effect on the increase in humidity stability, which emphasizes a generic electronic difference between protic ammonium and aprotic sulfonium cation. The current results would pave a new way to explore cations for the development of promising PSCs.

中文翻译：

钙钛矿太阳能电池中丁基二甲基锍阳离子增强水分稳定性。

人们已经研究了卤化物钙钛矿中的许多有机阳离子在钙钛矿太阳能电池（PSC）中的应用。 PSC 中的大多数有机阳离子都基于质子氮核心，易于去质子化。在这里，设计了一种新的全烷基化锍阳离子候选物（丁基二甲基锍；BDMS）并成功组装到 PSC 中，目的是提高湿度稳定性。基于 BDMS 的钙钛矿保留了原始钙钛矿的结构和光学特征，从而具有可比的光伏性能。然而，BDMS 的完全烷基化非质子性质对湿度稳定性的增加表现出更显着的影响，这强调了质子铵和非质子锍阳离子之间的一般电子差异。目前的结果将为探索阳离子以开发有前景的PSC开辟新的途径。

更新日期：2019-12-13

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