Wide-band-gap (WBG) perovskite solar cells have gained significant attention in silicon/perovskite tandem solar cells due to their suitable band gap and high open circuit voltage (V_oc). However, the phase separation and film defects of WBG perovskite films have severely hindered the larger V_oc and high efficiency. Herein, we demonstrate a simple passivation approach with potassium thiocyanate and methylammonium chloride dual-passivation, which could effectively increase the film grain size and suppress ion migration and phase separation. Consequently, the wide-band-gap perovskite (1.69 eV) solar cells with dual-passivation exhibit a relatively high power conversion efficiency (PCE) of 20.35% with a larger V_oc of 1.20 V. Meanwhile, a perovskite mini-module with an area of 12 cm² obtains an impressive PCE of 17.4%. The optimized state-of-the-art cells with dual-passivation exhibit a favorable storage and phase stability.

中文翻译：

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采用逃逸硫氰酸盐和坚固氯化物的双钝化策略实现大规模宽带隙钙钛矿模块

宽带隙（WBG）钙钛矿太阳能电池由于其合适的带隙和高开路电压（V _oc）而在硅/钙钛矿串联太阳能电池中获得了极大的关注。然而WBG钙钛矿薄膜的相分离和薄膜缺陷严重阻碍了较大的V _oc和高效率。在此，我们展示了一种硫氰酸钾和氯化甲基铵双钝化的简单钝化方法，可以有效增加薄膜晶粒尺寸并抑制离子迁移和相分离。因此，具有双钝化的宽带隙钙钛矿（1.69 eV）太阳能电池表现出相对较高的功率转换效率（PCE）为20.35％，V _oc为1.20 V。同时，钙钛矿迷你模块具有12 cm ²的面积获得了令人印象深刻的17.4%的PCE。经过优化的最先进的双钝化电池表现出良好的存储和相稳定性。