Vacancy healing for stable perovskite solar cells via bifunctional potassium tartrate  

作　　者：Jing Dou Yue Ma Xiuxiu Niu Wentao Zhou Xueyuan Wei Jie Dou Zhenhua Cui Qizhen Song Tinglu Song Huanping Zhou Cheng Zhu Yang Bai Qi Chen 

机构地区：[1]Experimental Centre for Advanced Materials,School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,China [2]Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials,Key Laboratory of Polymer Chemistry and Physics of Ministry of Education,BIC-ESAT,School of Materials Science and Engineering,Peking University,Beijing 100871,China

出　　处：《Journal of Energy Chemistry》2024年第1期64-70,I0002,共8页能源化学（英文版）

基　　金：funding support from the National Natural Science Foundation of China (52172182, 21975028, 22011540377, 22005035, U21A20172)。

摘　　要：Perovskite solar cell has gained widespread attention as a promising technology for renewable energy.However, their commercial viability has been hampered by their long-term stability and potential Pb leakage. Herein, we demonstrate a bifunctional passivator of the potassium tartrate(PT) to address both challenges. PT minimizes the Pb leakage in perovskites and also heals cationic vacancy defects, resulting in improved device performance and stability. Benefiting from PT modification, the power conversion efficiency(PCE) is improved to 23.26% and the Pb leakage in unencapsulated films is significantly reduced to 9.79 ppm. Furthermore, the corresponding device exhibits no significant decay in PCE after tracking at the maximum power point(MPP) for 2000 h under illumination(LED source, 100 mW cm^(-2)).

关 键 词：PEROVSKITE Potassium tartrate Lead leakage Long-term stability 

分 类 号：TM914.4[电气工程—电力电子与电力传动]