Introducing additives into perovskite layers is an effective method to enhance the power conversion efficiency (PCE) and operation stability of perovskite solar cells (PSCs). Herein, we reported an addition of carbon nanodots (CNDs) into the CsPbI₂Br photoactive layer to boost performance of the related PSCs. It is found that the trap density can be notably suppressed, and the crystallinity can be enhanced after introducing CNDs with an optimal quantity. The PSC with 1.0 wt% addition of CNDs delivers a notable improved average PCE of 13.77% (the highest PCE: 14.69%) from that of 12.14% for the control device without CND addition. Moreover, the CND-added CsPbI₂Br PSCs exhibit superior stability, i.e., ∼86 % retention of the initial PCE after 160 h aging in air with the humidity of 20%–30%, to the control device.

在钙钛矿层中引入添加剂是提高钙钛矿太阳能电池（PSC）的功率转换效率（PCE）和运行稳定性的有效方法。在此，我们报道了在 CsPbI ₂ Br 光敏层中添加碳纳米点 (CND) 以提高相关 PSC 的性能。结果表明，引入最佳数量的CNDs后，陷阱密度得到显着抑制，结晶度得到提高。添加 1.0 wt% CND 的 PSC 的平均 PCE 显着提高了 13.77%（最高 PCE：14.69%），而未添加 CND 的对照装置为 12.14%。此外，添加 CND 的 CsPbI ₂ Br PSCs 表现出优异的稳定性，即，在湿度为 20%–30% 的空气中老化 160 小时后，初始 PCE 的 86% 保留到控制装置中。