Organolead halide perovskite solar cells (PSC) are arising as promising candidates for next‐generation renewable energy conversion devices. Currently, inverted PSCs typically employ expensive organic semiconductor as electron transport material and thermally deposited metal as cathode (such as Ag, Au, or Al), which are incompatible with their large‐scale production. Moreover, the use of metal cathode also limits the long‐term device stability under normal operation conditions. Herein, a novel inverted PSC employs a SnO₂‐coated carbon nanotube (SnO₂@CSCNT) film as cathode in both rigid and flexible substrates (substrate/NiO‐perovskite/Al₂O₃‐perovskite/SnO₂@CSCNT‐perovskite). Inverted PSCs with SnO₂@CSCNT cathode exhibit considerable enhancement in photovoltaic performance in comparison with the devices without SnO₂ coating owing to the significantly reduced charge recombination. As a result, a power conversion efficiency of 14.3% can be obtained on rigid substrates while the flexible ones achieve 10.5% efficiency. More importantly, SnO₂@CSCNT‐based inverted PSCs exhibit significantly improved stability compared to the standard inverted devices made with silver cathode, retaining over 88% of their original efficiencies after 550 h of full light soaking or thermal stress. The results indicate that SnO₂@CSCNT is a promising cathode material for long‐term device operation and pave the way toward realistic commercialization of flexible PSCs.

中文翻译：

---

具有全无机电荷触点的碳纳米管倒置柔性钙钛矿太阳能电池

有机油卤化物钙钛矿太阳能电池（PSC）成为下一代可再生能源转换设备的有前途的候选者。当前，倒装PSC通常使用昂贵的有机半导体作为电子传输材料，并使用热沉积金属作为阴极（例如Ag，Au或Al），这与它们的大规模生产不兼容。此外，金属阴极的使用还限制了正常工作条件下的长期器件稳定性。在此，倒PSC一种新颖的采用的SnO ₂涂覆的碳纳米管（SNO ₂ @CSCNT）膜作为在刚性和柔性基板阴极（基材/氧化镍-钙钛矿/ Al的₂ ö ₃ -perovskite /的SnO ₂ @ CSCNT钙钛矿） 。具有SnO的反相PSC与没有SnO ₂涂层的器件相比，由于电荷复合的显着降低，₂ CSCS阴极在光伏性能上有显着提高。结果，在刚性基板上可获得14.3％的功率转换效率，而在柔性基板上可获得10.5％的效率。更重要的是，与使用银阴极制成的标准反向器件相比，基于SnO ₂ @CSCNT的反向PSC表现出显着改善的稳定性，在经过550h的全光浸泡或热应力后，其原始效率保持了88％以上。结果表明，SnO ₂ @CSCNT是一种有希望的阴极材料，可用于长期的器件操作，并为柔性PSC的实际商业化铺平了道路。