Monolithic perovskite/silicon tandem solar cells have achieved promising performance. However, hole transport layers that are commonly used for the perovskite top cell suffer from defects, non-conformal deposition or de-wetting of the overlying perovskite on the textured silicon bottom cells. These issues detrimentally affect device reproducibility and scalability, and thus commercialization. Here we address these challenges through the co-deposition of copper(I) thiocyanate and perovskite, where effective perovskite grain boundary passivation and efficient hole collection are simultaneously achieved by the embedded copper(I) thiocyanate, which creates local hole-collecting contacts. Fabricated monolithic perovskite/silicon tandem devices achieve a certified power conversion efficiency of 31.46% for 1 cm² area devices. Aside from good reproducibility and scalability, our tandem cells exhibit excellent stability, maintaining 93.8% of their initial power conversion efficiency after about 1,200 h of maximum power point tracking at 45 °C, and 90.2% after over 1,000 h of damp-heat testing at 85 °C and 85% relative humidity.

单片钙钛矿/硅叠层太阳能电池取得了可喜的性能。然而，通常用于钙钛矿顶部电池的空穴传输层存在缺陷、非保形沉积或纹理硅底部电池上覆盖的钙钛矿脱湿。这些问题对设备的可重复性和可扩展性产生了不利影响，从而影响了商业化。在这里，我们通过硫氰酸铜 （I） 和钙钛矿的共沉积来应对这些挑战，其中嵌入的硫氰酸铜 （I） 同时实现了有效的钙钛矿晶界钝化和高效的空穴收集，从而产生局部空穴收集接触。对于 1 cm² 面积的器件，制造的单片钙钛矿/硅串联器件实现了 31.46% 的认证功率转换效率。除了良好的可重复性和可扩展性外，我们的串联电池还表现出出色的稳定性，在 45 °C 下进行约 1,200 小时的最大功率点跟踪后，仍保持 93.8% 的初始功率转换效率，在 85 °C 和 85% 相对湿度下进行超过 1,000 小时的湿热测试后，仍保持 90.2% 的初始功率转换效率。