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Low- and high-energy photoluminescence from GaSb1−xBixwith 0 <x≤ 0.042
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Kopaczek, Jan, Kudrawiec, Robert, Linhart, Wojciech, Rajpalke, Mohana K., Jones, T. S. (Tim S.), Ashwin, M. J. and Veal, Tim (2014) Low- and high-energy photoluminescence from GaSb1−xBixwith 0 <x≤ 0.042. Applied Physics Express, Volume 7 (Number 11). Article number 111202. doi:10.7567/APEX.7.111202 ISSN 1882-0778.
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Official URL: http://dx.doi.org/10.7567/APEX.7.111202
Abstract
Two photoluminescence (PL) peaks were observed in temperature-dependent PL spectra of GaSb1−xBix layers with 0 < x ≤ 0.042. The high-energy (HE) peak was found to be associated with the bandgap-related emission in GaSb1−xBix, since its energy corresponds to the bandgap determined from photoreflectance measurements. The low-energy (LE) peak was attributed to the optical transition between the conduction band and native acceptor states, and was observed at low temperatures where acceptor states are not occupied by electrons. With increasing temperature, the intensity of the LE peak is quenched with the activation energy corresponding to the energy difference between HE and LE peaks.
| Item Type: | Journal Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||||||
| Journal or Publication Title: | Applied Physics Express | ||||||||
| Publisher: | Institute of Pure and Applied Physics | ||||||||
| ISSN: | 1882-0778 | ||||||||
| Official Date: | 4 November 2014 | ||||||||
| Dates: |
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| Volume: | Volume 7 | ||||||||
| Number: | Number 11 | ||||||||
| Article Number: | Article number 111202 | ||||||||
| DOI: | 10.7567/APEX.7.111202 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access |
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