A simple yet effective method based on hot-pressing a free-standing carbon film onto adjacent hole transport layer (HTL) is used to fabricate carbon electrode for planar perovskite solar cells (C–PSCs). Due to the thermoplasticity of as-prepared carbon film, the conductivity of the carbon electrode is enhanced by over ten-fold and the adhesion to adjacent layer is dramatically strengthened via this hot-pressing process. By optimizing the pressing temperature, 15.3% of power conversion efficiency (PCE) is obtained for CuSCN based C–PSCs, which is 70% high than the device without heating at the same pressing pressure. The device demonstrates 93% performance retention after being stored in a humid environment (55–70%) without encapsulation over 80 days. This facile fabrication process of PSCs paves a way to facilitate commercialization of the new PV technology.

中文翻译：

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通过热压方法制备高性能碳基平面钙钛矿太阳能电池

一种基于将独立碳膜热压到相邻空穴传输层 (HTL) 上的简单而有效的方法用于制造平面钙钛矿太阳能电池 (C-PSC) 的碳电极。由于所制备的碳膜的热塑性，碳电极的导电性提高了十倍以上，并且通过这种热压工艺显着增强了与相邻层的附着力。通过优化压制温度，CuSCN 基 C-PSC 获得了 15.3% 的功率转换效率 (PCE)，比相同压制压力下不加热的器件高 70%。在潮湿环境 (55–70%) 中储存 80 多天后，该器件表现出 93% 的性能保持率，无需封装。