In this study, a room-temperature and aqueous solution-processed two-dimensional (2D) transition-metal dichalcogenide TiS₂ was applied as an electron transport layer (ETL) in planar n–i–p perovskite solar cells (Pero-SCs). Upon insertion of the 2D TiS₂ ETL with UV-ozone (UVO) treatment, the power conversion efficiency (PCE) of the planar Pero-SCs was optimized to 18.79%. To the best of our knowledge, this value should be the highest efficiency to date among those PCEs of the n–i–p Pero-SCs with room-temperature-processed metal compound ETLs. More importantly, the n–i–p Pero-SCs with the UVO-treated 2D TiS₂ as an ETL also show extremely high stability, where the average PCE remained over 95% of its initial value after 816 h storage without encapsulation.

中文翻译：

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室温和水溶液处理的二维TiS ₂作为高效稳定的平面n–i–p钙钛矿太阳能电池的电子传输层

在这项研究中，在平面n–i–p钙钛矿太阳能电池（Pero-SCs）中，应用了室温和水溶液处理的二维（2D）过渡金属二硫代二硫化钛TiS ₂作为电子传输层（ETL）。 。在插入2D TiS ₂ ETL并进行UV-臭氧（UVO）处理后，平面Pero-SC的功率转换效率（PCE）被优化为18.79％。据我们所知，该值应该是具有室温处理金属化合物ETL的n–i–p Pero-SC的PCE中迄今为止最高的效率。更重要的是，以UVO处理的2D TiS ₂作为ETL的n–i–p Pero-SCs也显示出极高的稳定性，在不封装的情况下，平均PCE在816 h储存后仍保持其初始值的95％以上。