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- Gaur, A.P.S.University of Puerto Rico,Iowa State University (author)
Manipulation of exciton and trion quasiparticles in monolayer WS2 via charge transfer
- Article/chapterEnglish2019
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- AIP Publishing,2019
- electronicrdacarrier
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- LIBRIS-ID:oai:research.chalmers.se:fe3b318a-5e1b-4258-b281-eaaad8220e28
- https://research.chalmers.se/publication/513640URI
- https://doi.org/10.1063/1.5113775DOI
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- Language:English
- Summary in:English
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- Charge doping in transition metal dichalcogenide is currently a subject of high importance for future electronic and optoelectronic applications. Here, we demonstrate chemical doping in the CVD-grown monolayer (1L) of WS2 by a few commonly used laboratory solvents by investigating the room temperature photoluminescence (PL). The appearance of distinct trionic emission in the PL spectra and quenched PL intensities suggests n-type doping in WS2. The temperature-dependent PL spectra of the doped 1L-WS2 reveal a significant enhancement of trions emission intensity over the excitonic emission at low temperature, indicating the stability of trion at low temperature. The temperature-dependent exciton-trion population dynamic has been modeled using the law of mass action of trion formation. These results shed light on the solution-based chemical doping in 1L-WS2 and its profound effect on the photoluminescence which is essential for the control of optical and electrical properties for optoelectronic applications.
Subject headings and genre
- NATURVETENSKAP Fysik Atom- och molekylfysik och optik hsv//swe
- NATURAL SCIENCES Physical Sciences Atom and Molecular Physics and Optics hsv//eng
- NATURVETENSKAP Kemi Materialkemi hsv//swe
- NATURAL SCIENCES Chemical Sciences Materials Chemistry hsv//eng
- NATURVETENSKAP Fysik Den kondenserade materiens fysik hsv//swe
- NATURAL SCIENCES Physical Sciences Condensed Matter Physics hsv//eng
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- Rivera, A.M.University of Puerto Rico (author)
- Dash, Saroj Prasad,1975Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)saroj (author)
- Dey, SandwipArizona State University (author)
- Katiyar, R.S.University of Puerto Rico (author)
- Sahoo, S.Homi Bhabha National Institute (HBNI) (author)
- University of Puerto RicoIowa State University (creator_code:org_t)
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- In:Applied Physics Letters: AIP Publishing115:170003-69511077-3118
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