重组
晶界
兴奋剂
反演(地质)
光伏系统
热的
材料科学
能量转换效率
光电子学
化学
物理
微观结构
复合材料
电气工程
基因
构造盆地
工程类
古生物学
气象学
生物
生物化学
作者
Chao Chen,Kanghua Li,Shiyou Chen,Liang Wang,Shuaicheng Lu,Kun Wang,Deng‐Bing Li,Haisheng Song,Jiang Tang
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2018-09-07
卷期号:3 (10): 2335-2341
被引量:113
标识
DOI:10.1021/acsenergylett.8b01456
摘要
Sb2Se3 is a promising low-cost and low-toxicity photovoltaic material. Recent research revealed that recombination losses in the absorber limited the efficiency of Sb2Se3 solar cells. Herein we demonstrated a strategy of grain boundary (GB) inversion to alleviate such recombination loss. Owning to its one-dimensional crystal structure, we successfully inverted the GBs of Sb2Se3 films by introducing n-type Cu interstitial doping at GBs via low-temperature CuCl2 treatment. A built-in electric field is established between p-type grain interiors and n-type GBs, which spatially separates phototogerated carriers, suppresses recombination, and enhances carrier collection. Finally, we obtained an efficiency of 7.04%, which is the highest efficiency of Sb2Se3 solar cells based on rapid thermal evaporation technology. We envision that this GB inversion strategy is generally applicable to Sb2Se3 solar cells with different device configuration or produced from other methods and is extendable to other emerging low-dimensional solar cells.
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