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Exciton luminescence in AIN triggered by hydrogen and thermal annealing
University of Magdeburg, Germany.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering.
2015 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 106, no 24, 242101- p.Article in journal (Refereed) Published
Abstract [en]

Exciton recombination bands in homoepitaxial AIN layers are strongly dependent on the presence of hydrogen. By thermal treatment under hydrogen-free and hydrogen-rich ambient, respectively, several sharp bound exciton lines are modulated in intensity reversibly. In contrast, the exciton bound at the neutral donor silicon remains unaffected. The mechanism causing these effects is most probably hydrogen in-and out-diffusion into the AIN sample. The main factor determining hydrogenation of AIN layers is found to be molecular H-2 in contrast to NH3. We find hints that carbon incorporation into AIN may be closely related with that of hydrogen. Besides photoluminescence spectra of exciton bands, our model is supported by theoretical reports and comparison to the case of hydrogen in GaN.

Place, publisher, year, edition, pages
American Institute of Physics (AIP) , 2015. Vol. 106, no 24, 242101- p.
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-120167DOI: 10.1063/1.4922723ISI: 000356618700019OAI: oai:DiVA.org:liu-120167DiVA: diva2:841467
Note

Funding Agencies|Swedish Research Council (VR); Swedish Governmental Agency for Innovation Systems (VINNOVA); Linkoping Linnaeus Initiative for Novel Functional Materials (LiLi-NFM, VR)

Available from: 2015-07-13 Created: 2015-07-13 Last updated: 2017-12-04

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Nguyen, Son TienKakanakova-Gueorguie, Anelia

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