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Article: Well-width-dependent carrier lifetime in AIGaN/AIGaN quantum wells
Title | Well-width-dependent carrier lifetime in AIGaN/AIGaN quantum wells |
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Authors | |
Issue Date | 2007 |
Publisher | American Institute of Physics. The Journal's web site is located at http://apl.aip.org/ |
Citation | Applied Physics Letters, 2007, v. 90 n. 13, article no. 131907 How to Cite? |
Abstract | A set of Al0.35Ga0.65N/Al0.49Ga 0.51N multiple quantum wells (MQWs) with fixed barrier width and well widths varying from 1.65 to 5.0 nm has been grown by metal-organic chemical vapor deposition. Carrier dynamics in the MQWs were studied using time-resolved photoluminescence (PL) spectroscopy and light-induced transient grating (four wave mixing) technique. The authors observed that the lifetime of nonequilibrium carriers (excitons) increases with decreasing well width and interpreted the effect by stronger localization preventing their migration to nonradiative recombination centers. Meanwhile the radiative decay time is also influenced by screening of the built-in electric field, which spatially separates the electrons and holes. It is shown that this effect affects the initial part of PL intensity decay after pulsed excitation. It becomes more pronounced with increase in the initial carrier density but saturates when the carrier density is high enough to completely screen the built-in electric field. The screening effect on PL decay is stronger in wider quantum wells. © 2007 American Institute of Physics. |
Persistent Identifier | http://hdl.handle.net/10722/265790 |
ISSN | 2023 Impact Factor: 3.5 2023 SCImago Journal Rankings: 0.976 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Mickevičius, J. | - |
dc.contributor.author | Tamulaitis, G. | - |
dc.contributor.author | Kuokštis, E. | - |
dc.contributor.author | Liu, K. | - |
dc.contributor.author | Shur, M. S. | - |
dc.contributor.author | Zhang, J. P. | - |
dc.contributor.author | Gaska, R. | - |
dc.date.accessioned | 2018-12-03T01:21:42Z | - |
dc.date.available | 2018-12-03T01:21:42Z | - |
dc.date.issued | 2007 | - |
dc.identifier.citation | Applied Physics Letters, 2007, v. 90 n. 13, article no. 131907 | - |
dc.identifier.issn | 0003-6951 | - |
dc.identifier.uri | http://hdl.handle.net/10722/265790 | - |
dc.description.abstract | A set of Al0.35Ga0.65N/Al0.49Ga 0.51N multiple quantum wells (MQWs) with fixed barrier width and well widths varying from 1.65 to 5.0 nm has been grown by metal-organic chemical vapor deposition. Carrier dynamics in the MQWs were studied using time-resolved photoluminescence (PL) spectroscopy and light-induced transient grating (four wave mixing) technique. The authors observed that the lifetime of nonequilibrium carriers (excitons) increases with decreasing well width and interpreted the effect by stronger localization preventing their migration to nonradiative recombination centers. Meanwhile the radiative decay time is also influenced by screening of the built-in electric field, which spatially separates the electrons and holes. It is shown that this effect affects the initial part of PL intensity decay after pulsed excitation. It becomes more pronounced with increase in the initial carrier density but saturates when the carrier density is high enough to completely screen the built-in electric field. The screening effect on PL decay is stronger in wider quantum wells. © 2007 American Institute of Physics. | - |
dc.language | eng | - |
dc.publisher | American Institute of Physics. The Journal's web site is located at http://apl.aip.org/ | - |
dc.relation.ispartof | Applied Physics Letters | - |
dc.title | Well-width-dependent carrier lifetime in AIGaN/AIGaN quantum wells | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1063/1.2717145 | - |
dc.identifier.scopus | eid_2-s2.0-34047163490 | - |
dc.identifier.volume | 90 | - |
dc.identifier.issue | 13 | - |
dc.identifier.spage | article no. 131907 | - |
dc.identifier.epage | article no. 131907 | - |
dc.identifier.isi | WOS:000245317100028 | - |
dc.identifier.issnl | 0003-6951 | - |