Abstract Perovskite solar cells can be a cost-effective alternative to commonly used silicon photovoltaics. However, low stability of the hybrid lead halide perovskites hinders their practical application. This study presents a new composite electron transport layer ZnO/WO3 for improving stability of perovskite solar cells. The tungsten oxide coating prevented decomposition of perovskite deposited atop the ZnO layer and significantly increased the photostability of the absorber films. Consequently, the solar cells retained more than 80% of their maximal efficiency during accelerated aging tests at 80 mW cm−2 and 65 °C for 2000 h, significantly outperforming the reference devices made using individually ZnO or WO3 as electron transport layers.

中文翻译：

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用于稳定钙钛矿太阳能电池的热蒸发 WO3 表面改性 ZnO 电子传输层

摘要 钙钛矿太阳能电池是常用硅光伏电池的一种经济高效的替代品。然而，混合卤化铅钙钛矿的低稳定性阻碍了它们的实际应用。这项研究提出了一种新的复合电子传输层 ZnO/WO3，用于提高钙钛矿太阳能电池的稳定性。氧化钨涂层阻止了沉积在 ZnO 层顶部的钙钛矿分解，并显着提高了吸收膜的光稳定性。因此，太阳能电池在 80 mW cm-2 和 65 °C 2000 小时的加速老化测试中保持了其最大效率的 80% 以上，显着优于单独使用 ZnO 或 WO3 作为电子传输层制成的参考器件。