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Carrier lifetimes in AlGaN quantum wells: electric field and excitonic effects
KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.
KTH, School of Information and Communication Technology (ICT), Optics and Photonics.ORCID iD: 0000-0002-4606-4865
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2008 (English)In: Journal of Physics D: Applied Physics, ISSN 0022-3727, E-ISSN 1361-6463, Vol. 41, no 15Article in journal (Refereed) Published
Abstract [en]

Photoexcited carrier dynamics in a 280 nm AlGaN quantum well (QW) light emitting diode has been studied by time-resolved photoluminescence at forward and reverse bias. Long ( for AlGaN QWs with high Al content) room temperature carrier lifetimes of about 600 ps were measured with only a slight dependence on bias. These lifetimes are much longer than calculated free carrier tunnelling and thermionic emission times, pointing out the importance of excitonic effects for carrier dynamics in AlGaN QWs.

Place, publisher, year, edition, pages
2008. Vol. 41, no 15
Keyword [en]
binding-energy, photoluminescence, polarization, enhancement
Identifiers
URN: urn:nbn:se:kth:diva-17713DOI: 10.1088/0022-3727/41/15/155116ISI: 000257839700037Scopus ID: 2-s2.0-49749147151OAI: oai:DiVA.org:kth-17713DiVA: diva2:335758
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved
In thesis
1. Optical properties and degradation of deep ultraviolet AIGaN-based light-emitting diodes
Open this publication in new window or tab >>Optical properties and degradation of deep ultraviolet AIGaN-based light-emitting diodes
2011 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2011. 98 p.
Series
Trita-ICT/MAP AVH, ISSN 1653-7610 ; 2011:12
Keyword
AIGaN, deep-UV LEDs, polarization fields, screening, exciton binding energy, alloy fluctuations, near-field microscopy, carrier dynamics, LED aging
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:kth:diva-37917 (URN)978-91-7501-065-6 (ISBN)
Public defence
2011-09-20, Sal / Hall C1, Electrum,, Isafjordsgatan 26, Kista, 13:00 (English)
Opponent
Supervisors
Note
QC 20110831Available from: 2011-08-31 Created: 2011-08-19 Last updated: 2012-02-23Bibliographically approved

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Marcinkevicius, Saulius

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