As a hole transport materials (HTMs) and noble-metal free perovskite solar cells (PSCs), carbon-based PSCs (C-PSCs) have drawn much attention due to its low cost and excellent stability. The interfacial engineering, between perovskite and counter electrodes (CEs), played a crucial role in charge collection and affected the performance of C-PSCs. Herein, the systematic investigation of interfacial bridging carbon materials has been carried out to improve the interfacial contact. Results demonstrated that the morphology of interfacial bridging carbon materials played more important role than their energy band and conductivity, where carbon nanotube (CN) showed much better interfacial bridging effect and energy level alignment than other carbon materials. We achieved both the high power conversion efficiency (PCE) (15.09%) and stability in C-PSCs without HTMs due to the optimal interfacial bridging carbon material. It could retain 67% of their initial PCE after storing for 340 h under the rigorous environmental condition without any encapsulation (air atmosphere, 85 °C, 65% RH).

作为空穴传输材料（HTM）和不含贵金属的钙钛矿太阳能电池（PSC），碳基PSC（C-PSC）由于其低成本和出色的稳定性而备受关注。钙钛矿和反电极（CE）之间的界面工程在电荷收集中起着至关重要的作用，并影响了C-PSC的性能。在此，已经进行了界面桥接碳材料的系统研究以改善界面接触。结果表明，界面桥接碳材料的形态比其能带和电导率起着更重要的作用，其中碳纳米管（CN）显示出比其他碳材料更好的界面桥接效果和能级排列。我们同时实现了高功率转换效率（PCE）（15。由于采用了最佳的界面桥接碳材料，因此在不使用HTM的C-PSC中具有09％的稳定性）。在严格的环境条件下储存340小时后，它可以保留其初始PCE的67％，没有任何封装（大气，85°C，65％RH）。