材料科学
钙钛矿(结构)
能量转换效率
活动层
纳米技术
光电子学
工作(物理)
图层(电子)
机械工程
化学工程
薄膜晶体管
工程类
作者
Junlu Sun,Qilin Hua,Ranran Zhou,Dongmei Li,Wenxi Guo,Xiaohua Li,Guofeng Hu,Chongxin Shan,Qingbo Meng,Lin Dong,Caofeng Pan,Zhong Lin Wang
出处
期刊:ACS Nano
[American Chemical Society]
日期:2019-03-15
卷期号:13 (4): 4507-4513
被引量:84
标识
DOI:10.1021/acsnano.9b00125
摘要
Tremendous work has been made recently to improve the power conversion efficiencies (PCEs) of perovskite solar cells (PSCs); the best reported value is now over 23%. However, further improving the PCEs of PSCs is challenged by material properties, device stability, and packaging technologies. Here, we report a new approach to increase the PCEs of flexible PSCs via introducing the piezo-phototronic effect in the PSCs by growing an array of ZnO nanowires on flexible plastic substrates, which act as the electron-transport layer for PSCs. From the piezo-phototronic effect, the absolute PCE was improved from 9.3 to 12.8% for flexible perovskite solar cells under a static mechanical strain of 1.88%, with a ∼40% enhancement but no change in the components of materials and device structure. A corresponding working model was proposed to elucidate the strategy to boost the performance of the PSCs. These findings present a general approach to improve PCEs of flexible PSCs without changing their fundamental materials.
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