材料科学
钙钛矿(结构)
兴奋剂
价(化学)
离子
铌
化学工程
热稳定性
无机化学
光电子学
冶金
量子力学
物理
工程类
化学
作者
Zhanglin Guo,Shuai Zhao,Anmin Liu,Yusuke Kamata,Siow Hwa Teo,Shaopeng Yang,Zhenhua Xu,Shuzi Hayase,Tingli Ma
标识
DOI:10.1021/acsami.9b03622
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 α-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 Voc 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.
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