材料科学
钙钛矿(结构)
钝化
纳米棒
能量转换效率
光电子学
光子上转换
光电流
发光
纳米颗粒
纳米技术
钙钛矿太阳能电池
光致发光
光伏系统
化学工程
图层(电子)
工程类
生物
生态学
作者
Jionghua Wu,Shuping Wei,Xuehua Weng,Renjie Wang,Haifang Zhou,Shuying Cheng
标识
DOI:10.1016/j.solmat.2022.112029
摘要
Perovskite solar cells have drawn significant attention due to their excellent photovoltaic characteristics. Upconversion luminescence material modification is a good strategy to extend the device response to the near-infrared region, which can further increase device efficiency. By adding NaGdF4:Er3+/Yb3+ nanorods into chlorobenzene as an additive in the antisolvent to modify the perovskite layer, we found that upconversion luminescence nanoparticles can effectively improve the perovskite solar cell performance. However, unexpectedly, the photocurrent contributed by the infrared part is lower. The efficiency increase of perovskite solar cells is contributed by defect passivation. Further research shows that nanoparticles can effectively fill the holes and gaps at the grain boundaries, eliminate surface defects of the perovskite, and modify the perovskite film, which reduces carrier recombination and effectively improves the device's performance. Finally, the power conversion efficiency of the champion device can reach 21.1%. This research demonstrates the function of upconversion luminescence nanoparticles in PSCs and provides a simple way to improve the device's efficiency.
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