Plechinger, Gerd and Nagler, Philipp and Kraus, Julia and Paradiso, Nicola and Strunk, Christoph and Schueller, Christian and Korn, Tobias (2015) Identification of excitons, trions and biexcitons in single-layer WS2. PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS, 9 (8). pp. 457-461. ISSN 1862-6254, 1862-6270
Full text not available from this repository. (Request a copy)Abstract
Single-layer WS2 is a direct-gap semiconductor showing strong excitonic photoluminescence features in the visible spectral range. Here, we present temperature-dependent photoluminescence measurements on mechanically exfoliated single-layer WS2, revealing the existence of neutral and charged excitons at low temperatures as well as at room temperature. By applying a gate voltage, we can electrically control the ratio of excitons and trions and assert a residual n-type doping of our samples. At high excitation densities and low temperatures, an additional peak at energies below the trion dominates the photoluminescence, which we identify as biexciton emission. (C) 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | TIGHTLY BOUND TRIONS; BINDING-ENERGY; MONOLAYER; MOS2; dichalcogenides; WS2; photoluminescence; excitons; trions; biexcitons; direct-gap semiconductors |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group Christian Schüller Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Christoph Strunk |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 19 Jun 2019 09:22 |
| Last Modified: | 19 Jun 2019 09:22 |
| URI: | https://pred.uni-regensburg.de/id/eprint/5090 |
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