卤化物
钙钛矿(结构)
铯
光伏
材料科学
能量转换效率
热稳定性
钾
光电子学
纳米技术
无机化学
化学工程
化学
光伏系统
生物
工程类
冶金
生态学
作者
Jae Keun Nam,Sung Uk Chai,Wonhee Cha,Youn Jin Choi,Wanjung Kim,Myung Sun Jung,Jeong-Yi Kwon,Dongho Kim,Jae Hyung Park
出处
期刊:Nano Letters
[American Chemical Society]
日期:2017-02-10
卷期号:17 (3): 2028-2033
被引量:461
标识
DOI:10.1021/acs.nanolett.7b00050
摘要
Thermally unstable nature of hybrid organic–inorganic perovskites has been a major obstacle to fabricating the long-term operational device. A cesium lead halide perovskite has been suggested as an alternative light absorber, due to its superb thermal stability. However, the phase instability and poor performance are hindering the further progress. Here, cesium lead halide perovskite solar cells with enhanced performance and stability are demonstrated via incorporating potassium cations. Based on Cs0.925K0.075PbI2Br, the planar-architecture device achieves a power conversion efficiency of 10.0%, which is a remarkable record in the field of inorganic perovskite solar cells. In addition, the device shows an extended operational lifetime against air. Our research will stimulate the development of cesium lead halide perovskite materials for next-generation photovoltaics.
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