【摘要】 反式钙钛矿太阳电池埋底界面的缺陷是制约太阳电池器件效率和稳定性的重要原因，使用有机小分子钝化界面可以有效减少界面的缺陷，降低载流子的非辐射复合。本文通过将一种钝化材料与自组装空穴传输材料结合，一步实现具有二维钙钛矿材料钝化的埋底界面，实现了效率的提升。最终，经埋底界面钝化，刮涂制备的钙钛矿太阳电池实现了21.42%的能量转换效率。同时，我们还制作了孔径面积为21.5 cm~2的太阳能光伏组件，得到了21.02%的效率，并在封装后在85℃和85%湿度条件下稳定运行了近1 000 h，证明了该方法在大面积器件上的可拓展性和可靠性。更多还原

【Abstract】 The buried interface defects of inverted perovskite solar cells are a significant factor that can suppress the performance and lifetime of these solar cell devices. These defects can constrain the efficiency and stability, making it crucial to solve them for improved solar cell performance. Using organic small molecules as passivation materials has been shown to be an effective strategy to mitigate these interface defects, thereby reducing the non-radiative recombination of charge carriers. In this study, we have successfully integrated a kind of passivation material with a self-assembled hole transporting layer, enabling a one-step passivation of the buried interface with a two-dimensional perovskite material. After the deposition of the perovskite film, the number of excess lead iodide particles at the buried bottom interface was significantly reduced, and the presence of two-dimensional perovskite was detected, from which it can be hypothesized that the passivation material at the bottom reacted with the lead iodide to synthesize it. This innovative approach significantly improves the efficiency of solar cells, especially the Voc and device reproducibility due to the reduction of buried interface defects. Our results demonstrate that through the passivation of the buried interface, we were able to achieve an impressive efficiency of 21. 42% by using blade coating. Furthermore, to validate the scalability and practicality of our method, we fabricated perovskite solar modules with an aperture area of 21. 5 cm~2. These modules achieved an efficiency of 21. 02% and remained stable for almost 1 000 h at 85 ℃ and 85% humidity after proper encapsulation. The simplicity and efficiency of this process confirm the potential for large-scale applications in perovskite solar cell technology.更多还原