个人信息Personal Information
副教授
硕士生导师
性别:男
毕业院校:哈尔滨工业大学
学位:博士
所在单位:化工海洋与生命学院
学科:化学工程. 能源化工. 功能材料化学与化工
办公地点:D01-312A
联系方式:0427-2631809
电子邮箱:liuanmin@dlut.edu.cn
Niobium Incorporation into CsPbI2Br for Stable and Efficient All-Inorganic Perovskite Solar Cells
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论文类型:期刊论文
发表时间:2019-06-05
发表刊物:ACS APPLIED MATERIALS & INTERFACES
收录刊物:SCIE、EI、PubMed
卷号:11
期号:22
页面范围:19994-20003
ISSN号:1944-8244
关键字:all-inorganic perovskite; CsPbI2Br; niobium doping; phase stability; carbon electrode
摘要:All-inorganic perovskites are attracting increasing attention due to their superior thermal stability than that of the traditional CH3NH3PbI3, while their inferior phase stability in ambient conditions is still an unsolved issue. Here, for the first time, we report the incorporation of niobium (Nb5+) ions into the CsPbI2Br perovskite. Results indicate that Nb5+ can effectively stabilize the photoactive alpha-CsPbI2Br phase by the possible substitution of Pb2+. With 0.5% Nb doping, the carbon electrode-based all-inorganic perovskite solar cells achieved a high photoconversion efficiency value of 10.42%, 15% higher than that of the control device. The Nb5+ incorporation reduces the charge recombination in the perovskite, leading to a champion V-oc value of 1.27 V and a negligible hysteresis effect. This work explicates the high compatibility of all-inorganic perovskite materials and unlocks the opportunities for the use of high-valence ions for perovskite property modification.