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Origin of the enhanced edge optical transition in transition metal dichalcogenide flakes

文献类型：期刊论文

作者Huang, Pu2; Ma, Zhuang2; Wang, Gui2; Xiong, Wen1; Zhang, Peng2; Sun, Yiling2; Qian, Zhengfang2; Zhang, Xiuwen2
刊名JOURNAL OF MATERIALS CHEMISTRY C
出版日期2022-03-31
卷号10期号:13页码:5303-5310
ISSN号2050-7526
DOI10.1039/d2tc00078d
通讯作者Zhang, Xiuwen(xiuwenzhang@szu.edu.cn)
英文摘要Various edge configurations for transition metal dichalcogenide (TMD) flakes are inevitable during the material preparation. Such edge configurations with different local motifs play an important role in the optical transition. It is found in experiments that enhanced photoluminescence appears at the edge with a cation-terminated zigzag pattern but not at other edge configurations [Nat. Nanotechnol., 2020, 15, 29-34; Nano Lett., 2013, 13, 3447-3454]. We systematically studied the edge states of the feasible MoS2 flakes, and identified the edge modes at the S-passivated cation-terminated zigzag edge that endow strong optical transition. The identified edge states consist of the non-uniform edge mode of s-p-hybridized states within edge atoms, which can be preserved by the interior oxygens but destroyed by edge oxygens. The enhanced optical transition can be effectively tuned by in-plane and out-of-plane strains. Our study suggests the long-sought origin of the enhanced optical transition at the edge of TMD flakes, and provides a route to precisely manipulate the transition eigenstates for abundant functional edge structures with potential applications in transition-controlled electronic and optoelectronic devices.
资助项目National Natural Science Foundation of China[11804230] ; National Natural Science Foundation of China[11774239] ; National Natural Science Foundation of China[61827815] ; Shenzhen Science and Technology Innovation Commission[KQTD20180412181422399] ; Shenzhen Science and Technology Innovation Commission[KQTD20170810105439418] ; Shenzhen Science and Technology Innovation Commission[JCYJ20180507181858539] ; Shenzhen Science and Technology Innovation Commission[ZDSYS201707271554071] ; High-Level University Construction Funds of SZU[860-000002081209] ; High-Level University Construction Funds of SZU[860-000002110711]
WOS研究方向Materials Science ; Physics
语种英语
出版者ROYAL SOC CHEMISTRY
WOS记录号WOS:000765897500001
源URL[http://119.78.100.138/handle/2HOD01W0/15363]  
专题中国科学院重庆绿色智能技术研究院
通讯作者Zhang, Xiuwen
作者单位1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
2.Shenzhen Univ, Coll Phys & Optoelect Engn, Minist Educ & Guangdong Prov, Key Lab Optoelect Devices & Syst, Shenzhen 518060, Peoples R China
推荐引用方式
GB/T 7714		 Huang, Pu,Ma, Zhuang,Wang, Gui,et al. Origin of the enhanced edge optical transition in transition metal dichalcogenide flakes[J]. JOURNAL OF MATERIALS CHEMISTRY C,2022,10(13):5303-5310.
APA Huang, Pu.,Ma, Zhuang.,Wang, Gui.,Xiong, Wen.,Zhang, Peng.,...&Zhang, Xiuwen.(2022).Origin of the enhanced edge optical transition in transition metal dichalcogenide flakes.JOURNAL OF MATERIALS CHEMISTRY C,10(13),5303-5310.
MLA Huang, Pu,et al."Origin of the enhanced edge optical transition in transition metal dichalcogenide flakes".JOURNAL OF MATERIALS CHEMISTRY C 10.13(2022):5303-5310.

入库方式： OAI收割

来源：重庆绿色智能技术研究院

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