2016 Fiscal Year Final Research Report
Photoexcited state dynamics in two-dimensional monolayer materials by photocurrent femtosecond excitation spectroscopy
| Project/Area Number |
15K17678
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics I
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| Research Institution | Chiba University |
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Principal Investigator |
Yamada Yasuhiro 千葉大学, 大学院理学研究科, 准教授 (50532636)
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Keywords | 単層物質 |
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| Outline of Final Research Achievements |
Photoexcited state dynamics were studies by means of laser spectroscopy. We fabricated monolayer MoS2 films on substrates with different dielectric consntant. Optical properties were successufully controlled by the dielectric screesning effects. In addition, we attempted to improve the surface quality of MoS2 by TFSI and UV/ozone treatment. Photoluminescence efficiency of TFSI treated MoS2 is significantly enhanced but is reduced at low temperatures or in vacuum. In this study, we developed the method to improve the photoluminescence efficiency of TFSI treated MoS2. Out MoS2 monolayer sample shows clear separation of excitons adn trion photoluminescence.
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| Free Research Field |
光物性
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