Here, we report a scalable ultrasonic spray deposition under ambient conditions to fabricate a CsPbI₂Br-based all-inorganic perovskite thin film for photovoltaic applications. With the cooperated aid of vacuum extraction of the as-fabricated perovskite film and the incorporation of lead(II) acetate (Pb(Ac)₂) additive to the precursor solution, the quality of the perovskite film dramatically improved from the filled pinholes between the crystal grain with enhanced perovskite crystallinity. We found that the champion device for the 5% Pb(Ac)₂-doped CsPbI₂Br perovskite film combined with vacuum extraction achieved the best power conversion efficiency (PCE) of 10.06%, arising from the efficient defect dissipation within the film and the reduction in the charge recombination loss. Simultaneously, the thermal stability was boosted with the incorporation of Pb(Ac)₂ after aging at 85 °C for 10 days. We believe that the spray-coating process combined with the optimization of the all-inorganic perovskite film will help in the fabrication of a photoabsorbing layer for the future industrial upscaling of perovskite solar cells.

中文翻译：

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一步喷涂全无机 CsPbI ₂ Br 钙钛矿太阳能电池

在这里，我们报告了在环境条件下可扩展的超声波喷涂沉积，以制造用于光伏应用的 CsPbI ₂ Br 基全无机钙钛矿薄膜。借助真空抽吸所制备的钙钛矿薄膜和将醋酸铅 (II) (Pb(Ac) ₂ ) 添加剂掺入到前体溶液中，钙钛矿薄膜的质量从填充的针孔之间显着提高。具有增强钙钛矿结晶度的晶粒。我们发现 5% Pb(Ac) ₂掺杂的 CsPbI _{2 的}最佳器件Br钙钛矿薄膜结合真空抽取实现了10.06%的最佳功率转换效率（PCE），这是由于薄膜内的有效缺陷耗散和电荷复合损失的减少。同时，在 85 °C 下老化 10 天后，Pb(Ac) ₂的加入提高了热稳定性。我们相信，喷涂工艺与全无机钙钛矿薄膜的优化相结合，将有助于制造光吸收层，用于未来钙钛矿太阳能电池的工业升级。