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	Ultrafast formation of interlayer hot excitons in atomically thin MoS2/WS2 heterostructures
	Chen, Hailong1,2; Wen, Xiewen1,2,3; Zhang, Jing4,5; Wu, Tianmin6; Gong, Yongji2,3; Zhang, Xiang2,3; Yuan, Jiangtan3; Yi, Chongyue2; Lou, Jun3; Ajayan, Pulickel M.3
刊名	NATURE COMMUNICATIONS
	2016-08-01
卷号	7
英文摘要	Van der Waals heterostructures composed of two-dimensional transition-metal dichalcogenides layers have recently emerged as a new family of materials, with great potential for atomically thin opto-electronic and photovoltaic applications. It is puzzling, however, that the photocurrent is yielded so efficiently in these structures, despite the apparent momentum mismatch between the intralayer/interlayer excitons during the charge transfer, as well as the tightly bound nature of the excitons in 2D geometry. Using the energy-state-resolved ultrafast visible/infrared microspectroscopy, we herein obtain unambiguous experimental evidence of the charge transfer intermediate state with excess energy, during the transition from an intralayer exciton to an interlayer exciton at the interface of a WS2/MoS2 heterostructure, and free carriers moving across the interface much faster than recombining into the intralayer excitons. The observations therefore explain how the remarkable charge transfer rate and photocurrent generation are achieved even with the aforementioned momentum mismatch and excitonic localization in 2D heterostructures and devices.
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/35343]
专题	化学研究所_其它
作者单位	1.Peking Univ, Beijing Natl Lab Mol Sci, Coll Chem & Mol Engn, Beijing 100871, Peoples R China 2.Rice Univ, Dept Chem, 6100 Main St, Houston, TX 77005 USA 3.Rice Univ, Dept Mat Sci & NanoEngn, 6100 Main St, Houston, TX 77005 USA 4.Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China 5.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China 6.Univ Sci & Technol China, Dept Chem Phys, Hefei 230026, Peoples R China 7.Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Peoples R China
推荐引用方式 GB/T 7714	Chen, Hailong,Wen, Xiewen,Zhang, Jing,et al. Ultrafast formation of interlayer hot excitons in atomically thin MoS2/WS2 heterostructures[J]. NATURE COMMUNICATIONS,2016,7.
APA	Chen, Hailong.,Wen, Xiewen.,Zhang, Jing.,Wu, Tianmin.,Gong, Yongji.,...&Zheng, Junrong.(2016).Ultrafast formation of interlayer hot excitons in atomically thin MoS2/WS2 heterostructures.NATURE COMMUNICATIONS,7.
MLA	Chen, Hailong,et al."Ultrafast formation of interlayer hot excitons in atomically thin MoS2/WS2 heterostructures".NATURE COMMUNICATIONS 7(2016).

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