9.13%-Efficiency and stable inorganic CsPbBr3 solar cells. Lead-free CsSnBr3-xIx quantum dots promote charge extraction

被引：112
|
作者：
Xu, Hongzhe [1 ,2 ]
Duan, Jialong [2 ]
Zhao, Yuanyuan [2 ]
Jiao, Zhengbo [3 ]
He, Benlin [2 ]
Tang, Qunwei [1 ]
机构：
[1] Ocean Univ China, Sch Mat Sci & Engn, Qingdao 266100, Peoples R China
[2] Jinan Univ, Coll Informat Sci & Technol, Inst New Energy Technol, Guangzhou 510632, Guangdong, Peoples R China
[3] Qingdao Univ, Inst Mat Energy & Environm, Qingdao 266071, Peoples R China
来源：
JOURNAL OF POWER SOURCES | 2018年 / 399卷
基金：
中国国家自然科学基金;
关键词：
Inorganic perovskite solar cell; Interfacial modification; Lead-free perovskite quantum dots; Charge extraction; Charge recombination; PEROVSKITE; PERFORMANCE; NANOCRYSTALS; STABILITY; EFFICIENCY; EMISSION;
D O I：
10.1016/j.jpowsour.2018.07.091
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Interfacial charge recombination seriously drags efficiency enhancement of all-inorganic perovskite solar cells (PSCs) because of large energy-level differences. Although CsPbBr3-xIx light-harvesters markedly reduce interfacial charge recombination, the long-term stability of solar cell devices is still unsatisfactory to meet practical requirements. Here we present the improved charge extraction by setting an intermediated energy-level at CsPbBr3/carbon interface with colorful CsSnBr3-xIx quantum dots (QDs). The charge extraction is maximized by tuning Br:I ratio, yielding a power conversion efficiency as high as 9.13% for CsSnBr2I QDs-tailored CsPbBr3 solar cell. Moreover, all the devices show high stability in 80%RH or 80 degrees C over 720 h. The interfacial decoration of all-inorganic perovskite solar cells by lead-free perovskite QDs provides new opportunities of enhancing solar cell efficiency and reducing environmental impacts.
引用
收藏
页码：76 / 82
页数：7
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