Proceedings of International online conference on Hybrid materials and optoelectronic devices (HYBRIDOE)
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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