Design and build MoS2/Au/MoS2 sandwich structure to significantly enhance the photoluminescence

Shucheng Zhang; Liao Guan; Xinyue Niu; Jiadong Yao; Xiaoyuan Yan; Boran Xing; Ying Yu; Jian Sha; Yewu Wang

doi:10.1063/1.5115235

AIP Advances (Sep 2019)

Design and build MoS2/Au/MoS2 sandwich structure to significantly enhance the photoluminescence

Shucheng Zhang,
Liao Guan,
Xinyue Niu,
Jiadong Yao,
Xiaoyuan Yan,
Boran Xing,
Ying Yu,
Jian Sha,
Yewu Wang

Affiliations

Shucheng Zhang: Department of Physics & State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, People’s Republic of China
Liao Guan: Department of Physics & State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, People’s Republic of China
Xinyue Niu: Department of Physics & State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, People’s Republic of China
Jiadong Yao: Department of Physics & State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, People’s Republic of China
Xiaoyuan Yan: Department of Physics & State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, People’s Republic of China
Boran Xing: Department of Physics & State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, People’s Republic of China
Ying Yu: Department of Physics & State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, People’s Republic of China
Jian Sha: Department of Physics & State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, People’s Republic of China
Yewu Wang: Department of Physics & State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, People’s Republic of China

DOI: https://doi.org/10.1063/1.5115235
Journal volume & issue: Vol. 9, no. 9
pp. 095305 – 095305-7

Abstract

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Usually the bi-layer MoS2 grown directly by chemical vapor deposition or exfoliated by mechanical method has an indirect band gap, which leads to poor optical property. In this work, we design and build the sandwich structure by stacking a bi-layer MoS2 with Au nanoparticles embedded in the adjacent layers. This structure shows a 45-fold enhancement in photoluminescence (PL) compared with the direct grown bi-layer MoS2. More importantly, the as-built bi-layer MoS2 area shows much stronger in the PL intensity than that of the monolayer MoS2 area. This work presents the optimized PL enhancement of this homogeneous MoS2 structure by the surface plasmon resonance (SPR) effect of the Au nanoparticles and the effect of direct bandgap bi-layer MoS2 structures via tuning the interlayer distance between the adjacent MoS2 layers.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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