廖良生教授课题组在Advanced Materials上发表论文

题目：

Pb–Sn–Cu Ternary Organometallic Halide Perovskite Solar Cells

作者：

Meng Li^a, Zhao-Kui Wang^*a, Ming-Peng Zhuo^a, Yun Hu^a, Ke-Hao Hu, Qing-Qing Ye, Sagar M. Jain^b, Ying-Guo Yang^c, Xing-Yu Gao^c, and Liang-Sheng Liao* ^a

单位：

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

^bSPECIFIC, College of Engineering, Swansea University Bay Campus Fabian Way, SA1 8EN Swansea, UK

摘要：

Exploiting organic/inorganic hybrid perovskite solar cells (PSCs) with reduced Pb content is very important for developing environment-friendly photovoltaics. Utilizing of Pb–Sn alloying perovskite is considered as an efficient route to reduce the risk of ecosystem pollution. However, the trade-off between device performance and Sn substitution ratio due to the instability of Sn²⁺ is a current dilemma. Here, for the first time, the highly efficient Pb–Sn–Cu ternary PSCs are reported by partial replacing of PbI₂ with SnI₂ and CuBr₂. Sn²⁺ substitution results in a redshift of the absorption onset, whereas worsens the film quality. Interestingly, Cu²⁺ introduction can passivate the trap   sites at the crystal boundaries of Pb–Sn perovskites effectively. Consequently, a power conversion efficiency as high as 21.08% in inverted planar Pb–Sn–Cu ternary PSCs is approached. The finding opens a new route toward the fabrication of high efficiency Pb–Sn alloying perovskite solar cells by Cu²⁺ passivation.

影响因子：

19.791

分区情况：

1区

链接：

https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.201800258