Pure vapor method shows particular advantages in preparing large-area uniform and conformal perovskite film, which can be applied to manufacture perovskite modules and fully textured perovskite/silicon tandem solar cells (TSCs). Here, we provide details on controlling the vapor-solid reaction to acquire high-quality perovskite films, including precisely adjusting vapor pressure and organic salts component, vapor-solid reaction, and post-annealing perovskite film. By employing the optimized conditions, we obtained high-quality perovskite films. Power conversion efficiency (PCE) of the inverted structure device can reach as high as 18.1% with an absorber bandgap of 1.62 eV, among the highest PCE using the vapor technique (Table S1). Significantly, the large-area perovskite film has uniform crystallinity and coverage on textured silicon. Thus, the pure vapor fabrication method of perovskite films shed light on the application of perovskite solar cells because of the potential in module and tandem solar cells.

纯蒸汽法在制备大面积均匀保形钙钛矿薄膜方面表现出独特的优势，可用于制造钙钛矿模块和全织构钙钛矿/硅串联太阳能电池（TSC）。在这里，我们提供了控制气固反应以获得高质量钙钛矿薄膜的详细信息，包括精确调节蒸汽压和有机盐成分、气固反应和后退火钙钛矿薄膜。通过采用优化的条件，我们获得了高质量的钙钛矿薄膜。倒置结构器件的功率转换效率 (PCE) 可高达 18.1%，吸收带隙为 1.62 eV，是使用蒸汽技术的最高功率转换效率（表 S1）。值得注意的是，大面积钙钛矿薄膜具有均匀的结晶度和对织构硅的覆盖。因此，