Boosting the efficiency and stability of CsPbBr3 perovskite solar cells through modified multi-step spin-coating method

被引：5
|
作者：
Che, Guoliang [1 ]
Wang, Xiying [1 ]
Cui, Can [1 ]
Pang, Beili [1 ,3 ]
Wang, Xinjie [1 ]
Dong, Hongzhou [1 ]
Feng, Jianguang [1 ]
Yu, Liyan [1 ,3 ]
Dong, Lifeng [1 ,2 ,3 ]
机构：
[1] Qingdao Univ Sci & Technol, Coll Mat Sci & Engn, Qingdao 266042, Peoples R China
[2] Hamline Univ, Dept Phys, St Paul, MN 55104 USA
[3] 53 Zhengzhou Rd, Qingdao 266042, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2023年 / 969卷
基金：
中国国家自然科学基金;
关键词：
Low concentration CsBr; Low concentration PbBr 2; Long-term stability; CsPbBr; 3; Perovskite solar cells; FILMS; CRYSTAL;
D O I：
10.1016/j.jallcom.2023.172423
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this research, we enhance the stability of all-inorganic CsPbBr3 perovskite solar cells using a modified multi-step spin-coating technique. By introducing low-concentration CsBr and PbBr2 in two additional steps, we achieve a PbBr2 layer with fewer pinholes, improved crystallinity, and a smoother surface. This promotes the formation of a high-quality CsPbBr3 film with larger grains by incorporating a derivative-phase CsPb2Br5. This film reduces interface defects, enhances grain growth, and boosts power conversion efficiency from 5.43% to 9.36%. Notably, unencapsulated devices maintain stable performance for over 2400 h in ambient air conditions.
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收藏
页数：9
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