Electrically tunable non-radiative lifetime in WS<sub>2</sub>/WSe<sub>2</sub> heterostructures

doi:10.1039/d4nr01982b

IMR OpenIR

	Electrically tunable non-radiative lifetime in WS₂/WSe₂ heterostructures
	Wang, Anran 1; Wu, Xingguang 2; Zhao, Siwen 2; Han, Zheng Vitto 3; Shi, Yi 1; Cerullo, Giulio 4,5; Wang, Fengqiu 1
通讯作者	Wang, Fengqiu(fwang@nju.edu.cn)
	2024-07-18
发表期刊	NANOSCALE
ISSN	2040-3364
卷号	16 期号:28 页码:13687-13693
摘要	Van der Waals heterostructures based on transition metal dichalcogenides (TMDs) have emerged as excellent candidates for next-generation optoelectronics and valleytronics, due to their fascinating physical properties. The understanding and active control of the relaxation dynamics of heterostructures play a crucial role in device design and optimization. Here, we investigate the back-gate modulation of exciton dynamics in a WS2/WSe2 heterostructure by combining time-resolved photoluminescence (TRPL) and transient absorption spectroscopy (TAS) at cryogenic temperatures. We find that the non-radiative relaxation lifetimes of photocarriers in heterostructures can be electrically controlled for samples with different twist-angles, whereas such lifetime tuning is not present in standalone monolayers. We attribute such an observation to doping-controlled competition between interlayer and intralayer recombination pathways in high-quality WS2/WSe2 samples. The simultaneous measurement of TRPL and TAS lifetimes within the same sample provides additional insight into the influence of coexisting excitons and background carriers on the photo-response, and points to the potential of tailoring light-matter interactions in TMD heterostructures.
资助者	National Key Research and Development Program of China
DOI	10.1039/d4nr01982b
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2022YFA1204303]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目	Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS记录号	WOS:001263206500001
出版者	ROYAL SOC CHEMISTRY
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/188098
专题	中国科学院金属研究所
通讯作者	Wang, Fengqiu
作者单位	1.Nanjing Univ, Sch Elect Sci & Engn, Nanjing 210093, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 3.Shanxi Univ, Inst Optoelect, State Key Lab Quantum Opt & Quantum Opt Devices, Taiyuan 030006, Peoples R China 4.Politecn Milan, Dipartimento Fis, Piazza Leonardo Vinci 32, I-20133 Milan, Italy 5.CNR, Ist Foton & Nanotecnol IFN, Piazza Leonardo Vinci 32, I-20133 Milan, Italy
推荐引用方式 GB/T 7714	Wang, Anran,Wu, Xingguang,Zhao, Siwen,et al. Electrically tunable non-radiative lifetime in WS₂/WSe₂ heterostructures[J]. NANOSCALE,2024,16(28):13687-13693.
APA	Wang, Anran.,Wu, Xingguang.,Zhao, Siwen.,Han, Zheng Vitto.,Shi, Yi.,...&Wang, Fengqiu.(2024).Electrically tunable non-radiative lifetime in WS₂/WSe₂ heterostructures.NANOSCALE,16(28),13687-13693.
MLA	Wang, Anran,et al."Electrically tunable non-radiative lifetime in WS₂/WSe₂ heterostructures".NANOSCALE 16.28(2024):13687-13693.