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Time-resolved studies of photoluminescence in GaNxP1-x alloys: Evidence for indirect-direct band gap crossover
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Functional Electronic Materials.ORCID iD: 0000-0001-7155-7103
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Materials Science .ORCID iD: 0000-0002-9840-7364
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Materials Science .
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Functional Electronic Materials.ORCID iD: 0000-0002-6405-9509
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2002 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 81, no 1, 52- p.Article in journal (Refereed) Published
Abstract [en]

 Time resolved photoluminescence spectroscopy is employed to monitor the effect of N incorporation on the band structure of GaNP alloys. Abrupt shortening in radiative lifetime of near-band gap emissions, arising from excitonic radiative recombination within N-related centers, is found to occur at very low N compositions of around 0.5%, i.e., within the same range as the appearance of the direct-band gap-like transitions in the photomodulated transmission spectra of GaNP reported previously. The effect has been attributed to an enhancement in oscillator strength of optical transitions due to band crossover from indirect to direct-band gap of the alloy.

Place, publisher, year, edition, pages
2002. Vol. 81, no 1, 52- p.
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Natural Sciences
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URN: urn:nbn:se:liu:diva-45074DOI: 10.1063/1.1491286Local ID: 79574OAI: oai:DiVA.org:liu-45074DiVA: diva2:265936
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2017-12-13

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Buyanova, IrinaPozina, GaliaBergman, PederChen, Weimin

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