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231225s2017 xx |||||o 00| ||eng c |
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|a 10.1002/adma.201703680
|2 doi
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|a pubmed24n0918.xml
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|a (DE-627)NLM275621898
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|a eng
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| 100 |
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|a Tsai, Yutsung
|e verfasserin
|4 aut
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|a Tailoring Semiconductor Lateral Multijunctions for Giant Photoconductivity Enhancement
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|c 2017
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|a Text
|b txt
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Completed 18.07.2018
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|a Date Revised 01.10.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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|a Semiconductor heterostructures have played a critical role as the enabler for new science and technology. The emergence of transition-metal dichalcogenides (TMDs) as atomically thin semiconductors has opened new frontiers in semiconductor heterostructures either by stacking different TMDs to form vertical heterojunctions or by stitching them laterally to form lateral heterojunctions via direct growth. In conventional semiconductor heterostructures, the design of multijunctions is critical to achieve carrier confinement. Analogously, successful synthesis of a monolayer WS2 /WS2(1-x) Se2x /WS2 multijunction lateral heterostructure via direct growth by chemical vapor deposition is reported. The grown structures are characterized by Raman, photoluminescence, and annular dark-field scanning transmission electron microscopy to determine their lateral compositional profile. More importantly, using microwave impedance microscopy, it is demonstrated that the local photoconductivity in the alloy region can be tailored and enhanced by two orders of magnitude over pure WS2 . Finite element analysis confirms that this effect is due to the carrier diffusion and confinement into the alloy region. This work exemplifies the technological potential of atomically thin lateral heterostructures in optoelectronic applications
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|a Journal Article
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|a 2D transition-metal dichalcogenides (TMDs)
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|a carrier confinement
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|a lateral multijunctions
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|a Chu, Zhaodong
|e verfasserin
|4 aut
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|a Han, Yimo
|e verfasserin
|4 aut
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|a Chuu, Chih-Piao
|e verfasserin
|4 aut
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|a Wu, Di
|e verfasserin
|4 aut
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|a Johnson, Alex
|e verfasserin
|4 aut
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|a Cheng, Fei
|e verfasserin
|4 aut
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|a Chou, Mei-Yin
|e verfasserin
|4 aut
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|a Muller, David A
|e verfasserin
|4 aut
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|a Li, Xiaoqin
|e verfasserin
|4 aut
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|a Lai, Keji
|e verfasserin
|4 aut
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|a Shih, Chih-Kang
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
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|g 29(2017), 41 vom: 23. Nov.
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|u http://dx.doi.org/10.1002/adma.201703680
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