Ferrocene‐Induced Perpetual Recovery on All Elemental Defects in Perovskite Solar Cells
- 21 September 2021
- journal article
- research article
- Published by Wiley in Angewandte Chemie
- Vol. 60 (48), 25567-25574
- https://doi.org/10.1002/anie.202112074
Abstract
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 >1,000-hour durabilities under various extreme environments, including continuous 85ºC heating, 50% relative humidity wetting, and 1-sun light soaking.Funding Information
- National Key Research and Development Program of China (2017YFE0131900)
- National Natural Science Foundation of China (91833306, 62075094, 52003118)
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