Vacuum level dependent photoluminescence in chemical vapor deposition-grown monolayer MoS 2
The stronger photoluminescence (PL) in chemical vapor deposition (CVD) grown monolayer MoS2 has been attributed to its high crystal quality compared with that in mechanically exfoliated (ME) crystal, which is contrary to the cognition that the ME crystal usually have better crystal quality than that...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
2018
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| Online Access: | https://hdl.handle.net/10356/88319 http://hdl.handle.net/10220/45728 |
| _version_ | 1826112657144414208 |
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| author | Sun, Linfeng Zhang, Xiaoming Liu, Fucai Shen, Youde Fan, Xiaofeng Zheng, Shoujun Thong, John T. L. Liu, Zheng Yang, Shengyuan A. Yang, Hui Ying |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Sun, Linfeng Zhang, Xiaoming Liu, Fucai Shen, Youde Fan, Xiaofeng Zheng, Shoujun Thong, John T. L. Liu, Zheng Yang, Shengyuan A. Yang, Hui Ying |
| author_sort | Sun, Linfeng |
| collection | NTU |
| description | The stronger photoluminescence (PL) in chemical vapor deposition (CVD) grown monolayer MoS2 has been attributed to its high crystal quality compared with that in mechanically exfoliated (ME) crystal, which is contrary to the cognition that the ME crystal usually have better crystal quality than that of CVD grown one and it is expected with a better optical quality. In this report, the reason of abnormally strong PL spectra in CVD grown monolayer crystal is systematically investigated by studying the in-situ opto-electrical exploration at various environments for both of CVD and ME samples. High resolution transmission electron microscopy is used to investigate their crystal qualities. The stronger PL in CVD grown crystal is due to the high p-doping effect of adsorbates induced rebalance of exciton/trion emission. The first principle calculations are carried out to explore the interaction between adsorbates in ambient and defects sites in MoS2, which is consistent to the experimental phenomenon and further confirm our proposed mechanisms. |
| first_indexed | 2024-10-01T03:10:40Z |
| format | Journal Article |
| id | ntu-10356/88319 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:10:40Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/883192023-02-28T20:02:34Z Vacuum level dependent photoluminescence in chemical vapor deposition-grown monolayer MoS 2 Sun, Linfeng Zhang, Xiaoming Liu, Fucai Shen, Youde Fan, Xiaofeng Zheng, Shoujun Thong, John T. L. Liu, Zheng Yang, Shengyuan A. Yang, Hui Ying School of Electrical and Electronic Engineering School of Materials Science & Engineering School of Physical and Mathematical Sciences Centre for Programmable Materials Centre for Micro-/Nano-electronics (NOVITAS) Vacuum Photoluminescence DRNTU::Science::Physics The stronger photoluminescence (PL) in chemical vapor deposition (CVD) grown monolayer MoS2 has been attributed to its high crystal quality compared with that in mechanically exfoliated (ME) crystal, which is contrary to the cognition that the ME crystal usually have better crystal quality than that of CVD grown one and it is expected with a better optical quality. In this report, the reason of abnormally strong PL spectra in CVD grown monolayer crystal is systematically investigated by studying the in-situ opto-electrical exploration at various environments for both of CVD and ME samples. High resolution transmission electron microscopy is used to investigate their crystal qualities. The stronger PL in CVD grown crystal is due to the high p-doping effect of adsorbates induced rebalance of exciton/trion emission. The first principle calculations are carried out to explore the interaction between adsorbates in ambient and defects sites in MoS2, which is consistent to the experimental phenomenon and further confirm our proposed mechanisms. NRF (Natl Research Foundation, S’pore) Published version 2018-08-29T06:25:38Z 2019-12-06T17:00:37Z 2018-08-29T06:25:38Z 2019-12-06T17:00:37Z 2017 Journal Article Sun, L., Zhang, X., Liu, F., Shen, Y., Fan, X., Zheng, S., ...Yang, H. Y. (2017). Vacuum level dependent photoluminescence in chemical vapor deposition-grown monolayer MoS2. Scientific Reports, 7(1), 16714-. doi: 10.1038/s41598-017-15577-1 2045-2322 https://hdl.handle.net/10356/88319 http://hdl.handle.net/10220/45728 10.1038/s41598-017-15577-1 en Scientific Reports © 2017 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Te images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. 9 p. application/pdf |
| spellingShingle | Vacuum Photoluminescence DRNTU::Science::Physics Sun, Linfeng Zhang, Xiaoming Liu, Fucai Shen, Youde Fan, Xiaofeng Zheng, Shoujun Thong, John T. L. Liu, Zheng Yang, Shengyuan A. Yang, Hui Ying Vacuum level dependent photoluminescence in chemical vapor deposition-grown monolayer MoS 2 |
| title | Vacuum level dependent photoluminescence in chemical vapor deposition-grown monolayer MoS
2 |
| title_full | Vacuum level dependent photoluminescence in chemical vapor deposition-grown monolayer MoS
2 |
| title_fullStr | Vacuum level dependent photoluminescence in chemical vapor deposition-grown monolayer MoS
2 |
| title_full_unstemmed | Vacuum level dependent photoluminescence in chemical vapor deposition-grown monolayer MoS
2 |
| title_short | Vacuum level dependent photoluminescence in chemical vapor deposition-grown monolayer MoS
2 |
| title_sort | vacuum level dependent photoluminescence in chemical vapor deposition grown monolayer mos 2 |
| topic | Vacuum Photoluminescence DRNTU::Science::Physics |
| url | https://hdl.handle.net/10356/88319 http://hdl.handle.net/10220/45728 |
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