Ultrafast formation of interlayer hot excitons in atomically thin   MoS2/WS2 heterostructures

doi:10.1038/ncomms12512

CORC > 北京大学 > 化学与分子工程学院

	Ultrafast formation of interlayer hot excitons in atomically thin MoS2/WS2 heterostructures
	Chen, Hailong ; Wen, Xiewen ; Zhang, Jing ; Wu, Tianmin ; Gong, Yongji ; Zhang, Xiang ; Yuan, Jiangtan ; Yi, Chongyue ; Lou, Jun ; Ajayan, Pulickel M. ; Zhuang, Wei ; Zhang, Guangyu ; Zheng, Junrong
刊名	NATURE COMMUNICATIONS
	2016
关键词	DER-WAALS HETEROSTRUCTURES SINGLE-LAYER MOS2 MONOLAYER MOS2 GRAPHENE TRANSITION ELECTRONICS ABSORPTION GAS
DOI	10.1038/ncomms12512
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.; AFOSR award [FA9550-11-1-0070]; AFOSR MURI [FA9550-15-1-0022]; Welch foundation [C-1752]; David and Lucile Packard Foundation; Alfred P. Sloan Foundation; PKU; National Basic Research Program of China (973 Program) [2013CB934500]; National Science Foundation of China (NSFC) [61325021]; Strategic Priority Research Program (B) of the Chinese Academy of sciences [XDB0710100]; NSFC [21373201]; NSFC Key grant [21433014]; Chinese Academy of Sciences [XDB10040304, XDB 100202002]; SCI(E); PubMed; ARTICLE; wzhuang@fjirsm.ac.cn; gyzhang@iphy.ac.cn; zhengjunrong@gmail.com; 12512; 7
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/491763]
专题	化学与分子工程学院
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.
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.
MLA	Chen, Hailong,et al."Ultrafast formation of interlayer hot excitons in atomically thin MoS2/WS2 heterostructures".NATURE COMMUNICATIONS (2016).