袁建宇研究员在Adv. Mater.上发表论文

题目：

Homojunction Perovskite Quantum Dot Solar Cells with over 1 µm-Thick Photoactive Layer

作者：

Xuliang Zhang, Hehe Huang, Xufeng Ling, Jianguo Sun, Xingyu Jiang, Yao Wang, Di Xue, Lizhen Huang, Lifeng Chi, Jianyu Yuan,* and Wanli Ma

单位：

Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu 215123, China

摘要：

The solution-processed solar cells based on colloidal quantum dots (QDs) reported so far generally suffer from poor thickness tolerance and it is difficult for them to be compatible with large-scale solution printing technology. However, the recently emerged perovskite QDs, with unique high defect tolerance, are particularly well-suited for efficient photovoltaics. Herein, efficient CsPbI₃ perovskite QD solar cells are demonstrated first with over 1 µm-thick active layer by developing an internal P/N homojunction. Specifically, an organic dopant 2,2’-(perfluoronaphthalene-2,6-diylidene) dimalononitrile (F6TCNNQ) is introduced into CsPbI₃ QD arrays to prepare different carrier type QD arrays. The detailed characterizations reveal successful charge transfer doping of QDs and carrier-type transformation from n-type to p-type. Subsequently, the P/N homojunction perovskite QD solar cell is assembled using different carrier-type QDs, delivering an enhanced power conversion efficiency of 15.29%. Most importantly, this P/N homojunction strategy realizes remarkable thickness tolerance of QD solar cells, showing a record high efficiency of 12.28% for a 1.2 µm-thick QD active-layer and demonstrating great potential for the future printing manufacturing of QDs solar cells.

影响因子：

30.849

分区情况：

一区

链接：

https://onlinelibrary.wiley.com/doi/full/10.1002/adma.202105977