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원자제어 저차원 전자계 연구단
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Sub-Band-Gap Photoresponse Caused by Hot Electron Injections in Au Nanorod Decorated van der Waals Semiconductor Monolayers

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Title
Sub-Band-Gap Photoresponse Caused by Hot Electron Injections in Au Nanorod Decorated van der Waals Semiconductor Monolayers
Author(s)
Juho Kim; Gangtae Jin; Min Yeong Park; Soonyoung Cha; Yoon-Jong Moon; Moon-Ho Jo
Subject
Plasmon, ; Nanostructure, ; van der Waals materials, ; 2D materials, ; Photovoltaics
Publication Date
2020-07
Journal
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.77, no.2, pp.127 - 132
Publisher
KOREAN PHYSICAL SOC
Abstract
ⓒ2020 The Korean Physical Society Hot electrons in metal nanostructures can be exploited in a wide range of optical functions, including photocatalysis, surface-enhanced Raman scattering, photodetectors and photovoltaics. Here, we report the sub-band-gap (E-g) photoresponse in Au-nanorod decorated van der Waals (vdW) semiconductor, MoS(2)and WSe2, monolayers (MLs). We found that hot electrons, optically excited in Au nanorod (NR) arrays at sub-E(g)radiations, can be injected intovdWML semiconductors over Schottky barriers, producing substantial photocurrents inn-type MoS(2)andp-type WSe2ML photodetectors, as well as photovoltages inn-MoS2/p-WSe2ML stack junctions. Moreover, by using spectrally and light-polarization resolved measurements, we showed that these sub-E(g)excitations of hot electrons can be modulated by tuning the plasmon resonance to the shape-controlled AuNRs
URI
https://pr.ibs.re.kr/handle/8788114/7736
DOI
10.3938/jkps.77.127
ISSN
0374-4884
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > 1. Journal Papers (저널논문)
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