The Fluorescence Properties of Au Film-Monolayer WSe<sub>2</sub> Heterostructure

doi:10.13883/j.issn1004-5929.202102008

Chinese Journal of Light Scattering ›› 2021, Vol. 33 ›› Issue (2) : 165-170. DOI: 10.13883/j.issn1004-5929.202102008

Theories of Light Scattering

The Fluorescence Properties of Au Film-Monolayer WSe₂ Heterostructure

CEN Dongzhan, ZHENG Yexiong, LI Jiazhi, SHI Qingfeng, TANG Weiming, WEN Jinxiu^*

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Transition Metal Dichalcogenides (TMDs) have excellent optical and electrical properties. As one of the typical TMDs materials, two dimensional WSe₂ film has great potential application in the field of optoelectronic devices with its excellent optical band gap. However, the monolayer WSe₂ film with low optical absorption limits its application and development in photoelectric devices. Therefore, how to improve the light absorption and emission efficiency of monolayer WSe₂ films has become a research hotspot. In our works, the Au film-WSe₂ heterostructure was chosen as the research object, and used the microscopic photoluminescence spectrum to analysis the optical properties. We compared the photoluminescence properties of the Au film-WSe₂ heterostructure region and the edge of Au film-WSe₂ heterostructure. The results show that the photoluminescence intensity of Au film-WSe₂ heterostructure was weakened as fluorescence quenching effect, whereas the photoluminescence intensity of the edge of Au film-WSe₂ heterostructure was significantly enhanced own to the surface plasmon polariton effect. Finally, in order to explain this phenomenon, a physical model was established to explain the photoluminescence properties of the Au film-WSe₂ heterostructure.

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Au film-WSe₂ heterostructure / photoluminescence properties / surface plasmon polariton / fluorescence quenching

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CEN Dongzhan, ZHENG Yexiong, LI Jiazhi, SHI Qingfeng, TANG Weiming, WEN Jinxiu. The Fluorescence Properties of Au Film-Monolayer WSe₂ Heterostructure. Chinese Journal of Light Scattering. 2021, 33(2): 165-170 https://doi.org/10.13883/j.issn1004-5929.202102008

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Received	Revised	Published
2021-02-08	2021-05-09	2021-06-10
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2022-08-18

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