Ultrafast self-trapping of photoexcited carriers sets the upper limit on antimony trisulfide photovoltaic devices

doi:10.1038/s41467-019-12445-6

	Ultrafast self-trapping of photoexcited carriers sets the upper limit on antimony trisulfide photovoltaic devices
	Yang, Zhaoliang 1; Wang, Xiaomin 2; Chen, Yuzhong 1; Zheng, Zhenfa 3; Chen, Zeng 1; Xu, Wenqi4 ; Liu, Weimin4 ; Yang, Yang (Michael)5; Zhao, Jin 3; Chen, Tao 2; Zhu, Haiming 1,5
	2019-10-04
发表期刊	NATURE COMMUNICATIONS
ISSN	2041-1723
卷号	10
发表状态	已发表
DOI	10.1038/s41467-019-12445-6
摘要	Antimony trisulfide (Sb2S3) is considered to be a promising photovoltaic material; however, the performance is yet to be satisfactory. Poor power conversion efficiency and large open circuit voltage loss have been usually ascribed to interface and bulk extrinsic defects By performing a spectroscopy study on Sb2S3 polycrystalline films and single crystal, we show commonly existed characteristics including redshifted photoluminescence with 0.6 eV Stokes shift, and a few picosecond carrier trapping without saturation at carrier density as high as approximately 10(20) cm(-3). These features, together with polarized trap emission from Sb2S3 single crystal, strongly suggest that photoexcited carriers in Sb2S3 are intrinsically self-trapped by lattice deformation, instead of by extrinsic defects. The proposed self-trapping explains spectroscopic results and rationalizes the large open circuit voltage loss and near-unity carrier collection efficiency in Sb2S3 thin film solar cells. Self-trapping sets the upper limit on maximum open circuit voltage (approximately 0.8 V) and thus power conversion efficiency (approximately 16 %) for Sb2S3 solar cells.
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收录类别	SCI ; SCIE
语种	英语
资助项目	National Key Research and Development Program of China[2017YFA0207700] ; National Key Research and Development Program of China[2016YFA0200604] ; National Key Research and Development Program of China[2017YFA0204904]
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000489014000005
出版者	NATURE PUBLISHING GROUP
WOS关键词	SOLAR-CELLS ; OPTICAL-PROPERTIES ; SMALL POLARONS ; SB2S3 ; RECOMBINATION ; PERFORMANCE ; FILM ; MECHANISM ; CRYSTALS
原始文献类型	Article
引用统计
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/80415
专题	物质科学与技术学院_PI研究组_刘伟民组
通讯作者	Chen, Tao; Zhu, Haiming
作者单位	1.Zhejiang Univ, Ctr Chem High Performance & Novel Mat, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China 2.Univ Sci & Technol China, Dept Mat Sci & Engn, CAS Key Lab Mat Energy Convers, Hefei 230026, Anhui, Peoples R China 3.Univ Sci & Technol China, Dept Phys, Hefei 230026, Anhui, Peoples R China 4.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China 5.Zhejiang Univ, Coll Opt Sci & Engn, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Zhejiang, Peoples R China
推荐引用方式 GB/T 7714	Yang, Zhaoliang,Wang, Xiaomin,Chen, Yuzhong,et al. Ultrafast self-trapping of photoexcited carriers sets the upper limit on antimony trisulfide photovoltaic devices[J]. NATURE COMMUNICATIONS,2019,10.
APA	Yang, Zhaoliang.,Wang, Xiaomin.,Chen, Yuzhong.,Zheng, Zhenfa.,Chen, Zeng.,...&Zhu, Haiming.(2019).Ultrafast self-trapping of photoexcited carriers sets the upper limit on antimony trisulfide photovoltaic devices.NATURE COMMUNICATIONS,10.
MLA	Yang, Zhaoliang,et al."Ultrafast self-trapping of photoexcited carriers sets the upper limit on antimony trisulfide photovoltaic devices".NATURE COMMUNICATIONS 10(2019).