期刊
SOLAR RRL
卷 4, 期 3, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/solr.201900457
关键词
antioxidants; perovskites; solar cells; stabilities
资金
- National Key Research and Development Program of China [2018YFB1502900]
- National Natural Science Foundation of China Major International (Regional) Joint Research Project [51661135023, 51961165106]
- National Natural Science Foundation of China [21673091, 21975088]
- Fundamental Research Funds for the Central Universities [2018KFYXKJC034, 2019kfyRCPY040]
- China-EU Institute for Clean and Renewable Energy [3011187029]
Implementation of inorganic perovskite compounds and reduction toxicity of lead are important for developing sustainable and renewable photovoltaic power generation. The inorganic Pb/Sn binary metal halide perovskites offer a perfect opportunity for tuning optical bandgap and thus hold significant potential in emerging technologies such as solar cells. However, an easy oxidation of Sn2+ to Sn4+ has become one of the main issues for achieving efficient and stable Sn-based perovskite solar cells (PSCs). Herein, an effective method for stabilizing CsPb0.5Sn0.5I2Br is proposed to realize high-efficiency PSCs via antioxidant tea polyphenol (TP). It is found that TP can not only slow down the oxidation of Sn2+ but also regulate perovskite film crystallization during the formation of perovskite films via coordination interaction, leading to a reduced density of defects and an enlarged open-circuit voltage. The resultant perovskite solar cell using CsPb0.5Sn0.5I2Br (TP) with an all-inorganic mesoscopic framework of FTO/c-TiO2/m-TiO2/Al2O3/NiO/carbon achieves an impressive power conversion efficiency of 8.10% with high stability.
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