Institute of Photoelectronic Thin Film Devices and Technology, Renewable Energy Conversion and Storage Center, Solar Energy Research Center, Nankai University, Tianjin, 300350, P. R. China.
Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Tianjin, 300350, P. R. China.
Adv Mater. 2023 Jul;35(28):e2300581. doi: 10.1002/adma.202300581. Epub 2023 May 24.
Inorganic perovskite solar cells (IPSCs) have garnered attention in tandem solar cells (TSCs) due to their suitable bandgap and impressive thermal stability. However, the efficiency of inverted IPSCs has been limited by the high trap density on the top surface of inorganic perovskite film. Herein, a method for fabricating efficient IPSCs by reconfiguring the surface properties of CsPbI Br film with 2-amino-5-bromobenzamide (ABA) is developed. This modification not only exhibits the synergistic coordination of carbonyl (C=O) and amino (NH ) groups with uncoordinated Pb , but also the Br fills halide vacancies and suppresses the formation of Pb , effectively passivating the defective top surface. As a result, a champion efficiency of 20.38%, the highest efficiency reported for inverted IPSCs to date is achieved. Furthermore, the successful fabrication of a p-i-n type monolithic inorganic perovskite/silicon TSCs with an efficiency of 25.31% for the first time is demonstrated. Crucially, the unencapsulated ABA-treated IPSCs shows enhanced photostability, retaining 80.33% of its initial efficiency after 270 h, and thermal stability (maintain 85.98% of its initial efficiency after 300 h at 65 °C). The unencapsulated ABA-treated TSCs also retains 92.59% of its initial efficiency after 200 h under continuous illumination in ambient air.
无机钙钛矿太阳能电池（IPSCs）因其合适的能带隙和令人印象深刻的热稳定性而在串联太阳能电池（TSCs）中受到关注。然而，倒置 IPSCs 的效率受到无机钙钛矿薄膜顶表面高陷阱密度的限制。在此，通过用 2-氨基-5-溴苯甲酰胺（ABA）重构 CsPbI Br 薄膜的表面性质，开发了一种制备高效 IPSCs 的方法。这种修饰不仅表现出羰基（C=O）和氨基（NH ）基团与未配位的 Pb 的协同配位，而且 Br 填充卤化物空位并抑制 Pb 的形成，有效地钝化了有缺陷的顶表面。因此，实现了 20.38%的冠军效率，这是迄今为止报道的倒置 IPSCs 的最高效率。此外，首次成功制备了 p-i-n 型单片无机钙钛矿/硅 TSCs，效率为 25.31%。至关重要的是，未封装的经 ABA 处理的 IPSCs 表现出增强的光电稳定性，在 270 小时后保留其初始效率的 80.33%，并且热稳定性（在 65°C 下 300 小时后保持其初始效率的 85.98%）。未封装的经 ABA 处理的 TSCs 在环境空气中连续光照 200 小时后也保持其初始效率的 92.59%。
