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Time-resolved spectroscopy of strained GaN/AIN/6H-SiC heterostructures grown by metalorganic chemical vapor deposition
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.
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2001 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 78, no 8, 1062-1064 p.Article in journal (Refereed) Published
Abstract [en]

Temperature-dependent time-resolved photoluminescence measurements were performed on GaN film/AlN buffer/6H-SiC substrate heterostructures grown by metalorganic chemical vapor deposition. The overlying GaN layers were under tension, as estimated from the free A exciton (FEA) position. The recombination lifetimes were determined for the FEA and for the neutral-donor-bound exciton (D0X). We observed that the recombination lifetime for the FEA has the same value of 40-50 ps in all the layers, whereas the recombination time for the D0X varies for different samples. We observed that the recombination lifetimes for D0X have a clear dependence on the position of FEA, i.e., the recombination lifetime increases with decreasing strain in the layers. We discuss the results in term of the hole states involved in the donor-bound exciton recombination. © 2001 American Institute of Physics.

Place, publisher, year, edition, pages
2001. Vol. 78, no 8, 1062-1064 p.
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Engineering and Technology
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URN: urn:nbn:se:liu:diva-47471DOI: 10.1063/1.1350421OAI: oai:DiVA.org:liu-47471DiVA: diva2:268367
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-13

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Pozina, GaliaBergman, PederPaskova, TanjaMonemar, Bo

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