Due to their excellent photo-to-electric power conversion efficiency (PCE) (up to 25.2%) under AM 1.5G (≈100,000 Lux), the perovskite solar cells (PSCs) have received widespread attention in recent years, but the research on their weak light (0–1000 Lux) performances is still rare. So, the effect factors of their weak light performances were explored in this work. According to the results, the PSCs with higher shunt resistance (R_sh) exhibit better weak light performances. The PSCs with low R_sh exhibit a significant weak diode leakage mechanism, and thus their output characteristics would decrease seriously with the decrease of light intensity. This work provides constructive guidelines for improving the weak light performances of PSCs.

由于钙钛矿型太阳能电池（PSC）在AM 1.5G（≈100,000Lux）下具有出色的光电转换效率（PCE）（高达25.2％），因此近年来受到了广泛关注。它们的弱光（0–1000 Lux）性能仍然很少。因此，本文探讨了其弱光性能的影响因素。根据结果​​，具有较高分流电阻（R _sh）的PSC表现出更好的弱光性能。具有低R _sh的PSC表现出明显的弱二极管泄漏机制，因此，随着光强度的降低，其输出特性将严重降低。这项工作为改善PSC的弱光性能提供了建设性的指导。