With the rapid progress of perovskite solar cells (PSCs), both high efficiency and sufficient stability are required simultaneously for their real-life application, wherein interfaces play an essential role. In this work, we develop sandwiched electrode buffer (SEB) with respect to the hole-transport layer (HTL), wherein dual back surface fields are implemented at two interfaces in relevance. The SEB bridges the absorber to the back electrode with the desired band alignment and multi-defect passivation effects, which stabilize the perovskite, HTL, and metal electrodes. Accordingly, planar n-i-p PSCs with SEB achieve an efficiency of 23.9% (certified 23.4%). Notably, they exhibit a remarkable operational stability with only a 3% efficiency decline for 2,000 h maximum power point tracking under 1-Sun illumination. Furthermore, the devices also show excellent thermal stability and humidity stability. Therefore, the SEB configuration boosts both efficiency and stability of PSCs, which paves the way for the commercialization of perovskite optoelectronics.

随着钙钛矿太阳能电池（PSC）的快速发展，其实际应用同时需要高效率和足够的稳定性，其中界面起着至关重要的作用。在这项工作中，我们开发了与空穴传输层 (HTL) 相关的夹层电极缓冲液 (SEB)，其中在相关的两个界面上实现了双背面场。SEB 将吸收体桥接到背面电极，具有所需的能带排列和多缺陷钝化效果，从而稳定钙钛矿、HTL 和金属电极。因此，具有 SEB 的平面 nip PSC 实现了 23.9%（经认证为 23.4%）的效率。值得注意的是，它们表现出卓越的运行稳定性，在 1-Sun 光照下 2,000 小时最大功率点跟踪的效率仅下降 3%。此外，这些器件还表现出出色的热稳定性和湿度稳定性。因此，SEB 配置提高了 PSC 的效率和稳定性，为钙钛矿光电的商业化铺平了道路。