| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Tuning Photoluminescence Performance of Monolayer MoS2 via H2O2 Aqueous Solution |
| CHENG Ying, WANG Jun-Zhuan**, WEI Xiao-Xu, GUO Dan, WU Bing, YU Lin-Wei, WANG Xin-Ran, SHI Yi |
Key Laboratory of Photonic and Electronic Materials and School of Electronic Science and Engineering, Nanjing University, Nanjing 210093
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| Cite this article: |
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CHENG Ying, WANG Jun-Zhuan, WEI Xiao-Xu et al 2015 Chin. Phys. Lett. 32 117801 |
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Abstract We demonstrate a simple while very effective approach to tune the photoluminescence (PL) performance of monolayer MoS2 by dipping into the H2O2 aqueous solution, which is a strong oxidizer that extracts electrons from the MoS2 sheet within several seconds without damaging the crystal structure. During this process, the trion (electron-coupled exciton, X?) is transformed into an exciton (Xo), and thus achieves a greatly enhanced PL performance. These results indicate a convenient way to tune and to control the PL luminescence from monolayer MoS2 and thus lay a basis for the MoS2-based optoelectronic application.
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Received: 12 June 2015
Published: 01 December 2015
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| PACS: |
78.67.-n
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(Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)
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78.40.Fy
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(Semiconductors)
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