Efficient CsSnI3-based inorganic perovskite solar cells via incorporating a donor element
Tao Zhang a, Mingkui Wang a
a Huazhong University of Science and Technology, Wuhan National Laboratory for Optoelectronics (WNLO), 1037 Luoyu Road Wuhan 430074, P.R. China, Wuhan, 4300074, China
nanoGe Perovskite Conferences
Proceedings of International online conference on Hybrid materials and optoelectronic devices (HYBRIDOE)
Online, Spain, 2020 December 15th - 17th
Organizers: Xueqing Xu, Baomin Xu, Hin-Lap (Angus) Yip and Xinhua Zhong
Poster, Tao Zhang, 044
Publication date: 4th December 2020

We present a chemical doping agent of cobaltocene (denoted CoCp2) with strong electron-donating ability for the first time as stabilizer and electrical property manipulator to inorganic CsSnI3 perovskite compound for photovoltaic application. A thermal-driven electron injection from CoCp2 into CsSnI3 maintains a reducing environment and thereby effectively suppresses the Sn2+ oxidation (named after remote reduction). Consequently, the performance was significantly improved with cobaltocene additive, achieving a PCE of 3.0% with the full printable mesoscopic PSC architecture due to defect depression.

Financial support from the National Natural Science Foundation of China Major International (Regional) Joint Research Project (NO. 51661135023, 51961165106), National Natural Science Foundation of China (No. 21673091, 21975088) are acknowledged. This project was also funded by the Fundamental Research Funds for the Central Universities (2018KFYXKJC034, 2019kfyRCPY040) and the double first-class research funding of China-EU Institute for Clean and Renewable Energy (3011187029). The authors thank the Analytical and Testing Centre of Huazhong University of Science & Technology for the measurements of the samples.

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