期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 60, 期 48, 页码 25567-25574出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202112074
关键词
chain-reaction cycle; defects; ferrocene; perovskites; solar cells
资金
- National Key Research and Development Program of China [2017YFE0131900]
- National Natural Science Foundation of China [91833306, 62075094, 52003118]
- Jiangsu Science Foundation for Distinguished Young Scholars
- Jiangsu Innovative and Entrepreneurial Talent Program
- Young 1000 Talents Global Recruitment Program of China
- Six talent peaks Project in Jiangsu Province
The researchers proposed a recovery agent, ferrocene, which can effectively repair various elemental defects in perovskite solar cells and achieve self-regeneration, allowing PSCs to have long-term stability in various extreme environments.
Lead halide perovskites always emerge complex interactions among different elemental ions, which lead to multiple intrinsic imperfections. Elemental defects, such as amine, Pb, and I vacancies at A-, B-, and X-sites, are main issues to deteriorate perovskite solar cells (PSCs). Unfortunately, most previous passivators can only temporarily fix partial inactive vacancies as sacrificial agents. Herein, we propose a recovery agent, ferrocene (Fc), which can form a one-dimensional perovskite with adequate steric cavities and suitable dissociation energy to recover all elemental defects back to active light-harvesting perovskites, and regenerate Fc itself meanwhile. Based on this perpetual chain-reaction cycle, corresponding PSCs maintain >10 000-hour lifetime in inert condition and >1000-hour durabilities under various extreme environments, including continuous 85 degrees C heating, 50 % relative humidity wetting, and 1-sun light soaking.
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