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Nano Research 2021, 14(11): 4274-4280 https://doi.org/10.1007/s12274-021-3667-6
Research Article | Issue | Published: 11 August 2021

Unraveling the synergetic mechanism of physisorption and chemisorption in laser-irradiated monolayer WS2

Show Author's Information Yuanzheng Li1,§,  Jiaxu Yan1,§,  Jinping Chen2,  Tong Yu1,  Hang Ren1,  Xiuling Liu3,  Weizhen Liu1( ),  Guochun Yang1,  Chunxiang Xu2,  Qiaoliang Bao4( ),  Yichun Liu1,  Haiyang Xu1( )
Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education Northeast Normal University Changchun 130024 China
State Key Laboratory of Bioelectronics School of Biological Science and Medical Engineering Southeast University Nanjing 210096 China
School of Materials Science and Engineering Changchun University of Science and Technology Changchun 130022 China
Department of Materials Science and Engineering ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET) Monash University Wellington Road Clayton VIC 3800 Australia

§ Yuanzheng Li and Jiaxu Yan contributed equally to this work.

Keywords:
photoluminescence, WS2, laser irradiation, chemisorption, physisorption
Topics:
Optical properties
Cite this article:
Li Y, Yan J, Chen J, et al. Unraveling the synergetic mechanism of physisorption and chemisorption in laser-irradiated monolayer WS2. Nano Research, 2021, 14(11): 4274-4280. https://doi.org/10.1007/s12274-021-3667-6
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Abstract Full text Electronic supplementary material About this article

To further improve the quantum efficiency of atomically thin transition metal dichalcogenides (TMDs) is crucial for the realization of high-performance optoelectronic applications. To this regard, a few chemical or physical approaches such as superacid treatment, electrical gating, dielectric screening, and laser irradiation have been developed. In particular, the laser irradiation appears to be a more efficient way with good processability and spatial selectivity. However, the underlying mechanism especially about whether chemisorption or physisorption plays a more important role is still debatable. Here, we unravel the mystery of laser irradiation induced photoluminescence enhancement in monolayer WS2 by precisely controlling irradiation time and environment. It is found that the synergetic effect of physisorption and chemisorption is responsible for the photoluminescence enhancement, where the physisorption dominates with more than 74% contribution. The comprehensive understanding of the adsorption mechanism in laser-irradiated TMDs may trigger the potential applications for patterned light source, effective photosensor and ultrathin optical memory.


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Electronic supplementary material
About this article

Unraveling the synergetic mechanism of physisorption and chemisorption in laser-irradiated monolayer WS2

Show Author's information Yuanzheng Li1,§, Jiaxu Yan1,§, Jinping Chen2, Tong Yu1, Hang Ren1, Xiuling Liu3, Weizhen Liu1( ), Guochun Yang1, Chunxiang Xu2, Qiaoliang Bao4( ), Yichun Liu1, Haiyang Xu1( )
Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education Northeast Normal University Changchun 130024 China
State Key Laboratory of Bioelectronics School of Biological Science and Medical Engineering Southeast University Nanjing 210096 China
School of Materials Science and Engineering Changchun University of Science and Technology Changchun 130022 China
Department of Materials Science and Engineering ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET) Monash University Wellington Road Clayton VIC 3800 Australia

§ Yuanzheng Li and Jiaxu Yan contributed equally to this work.

Abstract

To further improve the quantum efficiency of atomically thin transition metal dichalcogenides (TMDs) is crucial for the realization of high-performance optoelectronic applications. To this regard, a few chemical or physical approaches such as superacid treatment, electrical gating, dielectric screening, and laser irradiation have been developed. In particular, the laser irradiation appears to be a more efficient way with good processability and spatial selectivity. However, the underlying mechanism especially about whether chemisorption or physisorption plays a more important role is still debatable. Here, we unravel the mystery of laser irradiation induced photoluminescence enhancement in monolayer WS2 by precisely controlling irradiation time and environment. It is found that the synergetic effect of physisorption and chemisorption is responsible for the photoluminescence enhancement, where the physisorption dominates with more than 74% contribution. The comprehensive understanding of the adsorption mechanism in laser-irradiated TMDs may trigger the potential applications for patterned light source, effective photosensor and ultrathin optical memory.

Keywords: photoluminescence, WS2, laser irradiation, chemisorption, physisorption

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Acknowledgements

Publication history

Received: 17 November 2020
Revised: 26 May 2021
Accepted: 09 June 2021
Published: 11 August 2021
Issue date: November 2021

Copyright

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021

Acknowledgements

Acknowledgements

This work was supported by the Program of National Natural Science Foundation of China (Nos. 51732003, 51872043, 61604037, 11874104, 12074060, and 12004069), the National Science Fund for Distinguished Young Scholars (No. 52025022), the "111" Project (No. B13013), the National Key Research and Development Program of China (Nos. 2016YFA0201902 and 2019YFB2205100), Fund from Ministry of Education (No. 6141A02033414), Shenzhen Nanshan District Pilotage Team Program (No. LHTD20170006), the China Postdoctoral Science Foundation funded project (Nos. 2020M681025, 2021T140109, and 2021M693905), the Fundamental Research Funds for the Central Universities (Nos. 2412020QD015, 2412019BJ006, 2412021ZD007, 2412021ZD012, and 2412019FZ034), Post­doctoral Science Foundation funded project from Jilin Province (No. 111865005), and the Fund from Jilin Province (Nos. YDZJ202101ZYTS049, YDZJ202101ZYTS041, YDZJ202101ZYTS133, JJKH20211273KJ, JJKH20211274KJ, and 20190103007JH).

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