钙钛矿(结构)
锡
甲脒
材料科学
铯
能量转换效率
光伏系统
化学工程
金属
无机化学
化学
光电子学
冶金
电气工程
工程类
作者
Daniel Ramírez,Kelly Schutt,Zhiping Wang,Andrew J. Pearson,Edoardo Ruggeri,Henry J. Snaith,Samuel D. Stranks,Franklin Jaramillo
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2018-08-25
卷期号:3 (9): 2246-2251
被引量:64
标识
DOI:10.1021/acsenergylett.8b01411
摘要
For neat Pb perovskites, two-dimensional (2D) hybrid perovskites, where n layers of inorganic material are separated by a long-chain organic cation, generally exhibit greater stability but have lower photovoltaic performance characteristics, motivating the study of 2D/3D mixed-dimension systems to realize both high efficiency and stability. In this Letter, we demonstrate such optimal compromise between performance and stability using formamidinium, cesium, and t-butylammonium as A-site cations with Pb:Sn mixed-metal low-band-gap perovskites. Perovskite solar cells based on n = 4 and 5 lead–tin perovskites achieved power conversion efficiencies of up to 9.3 and 10.6%, respectively, and correspondingly retained 47 and 29% of their initial efficiency during storage in nitrogen for 2000 h. A similar stability trend for n = 4 over n = 5 was also observed for unencapsulated devices during continuous operation under a combined air atmosphere and temperature for 10 h, resulting in improved stability over the 3D lead–tin counterpart.
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