Stabilizing the embedded perovskite-substrate interface without UV-vis damage remains a longstanding challenge in perovskite solar cells and modules since it leads to energy loss and phase instability under UV-vis illumination. In this work, we developed a buried interface reinforcement strategy utilizing cyano-based organic emitters with near-unity photoluminescence. Due to the dipole homogenization effect, the electron distribution around the cyano group in triphenylamine-based emitter becomes more dispersed, making it better suited to compensate for iodide vacancies and reinforce the PbI₆ octahedral configuration at the buried interface. This emitter with near-unity photoluminescence further suppresses the photochemical degradation during long-term illumination, thereby contributing to better cell performance and stability. Devices with an active area of 0.10 cm² obtain a champion efficiency of up to 25.67% (certified 25.09%), while the recorded efficiencies of solar modules reach 23.41% (certified 22.83%) and 21.91% for the aperture areas of 11.44 and 72.00 cm². An unencapsulated device retains 90% of its original performance after 1000 h of continuous 1-sun illumination at maximum power point operating conditions.

中文翻译：

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具有近乎均匀光致发光的有机发射体可增强钙钛矿太阳能电池和模块的埋入界面


在钙钛矿太阳能电池和模块中，稳定嵌入式钙钛矿-基板界面而不造成紫外-可见光损伤仍然是一个长期的挑战，因为它会导致紫外-可见光照射下的能量损失和相位不稳定。在这项工作中，我们开发了一种利用具有近乎一致光致发光的氰基有机发射体的掩埋界面增强策略。由于偶极均匀化效应，三苯胺基发射体中氰基周围的电子分布变得更加分散，使其更适合补偿碘化物空位并增强埋入界面处的PbI ₆ 八面体构型。这种具有近乎均匀光致发光的发射器进一步抑制了长期照明期间的光化学降解，从而有助于提高电池性能和稳定性。有效面积为 0.10 cm ² 的器件获得高达 25.67%（认证为 25.09%）的冠军效率，而太阳能组件的记录效率达到 23.41%（认证为 22.83%）和 21.91%。孔径面积为 11.44 和 72.00 cm ² 。在最大功率点工作条件下连续 1 太阳照明 1000 小时后，未封装的器件仍保留其原始性能的 90%。