دورية أكاديمية
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Impact of alloy fluctuations and Coulomb effects on the electronic and optical properties of c-plane GaN/AlGaN quantum wells.

التفاصيل البيبلوغرافية
العنوان: Impact of alloy fluctuations and Coulomb effects on the electronic and optical properties of c-plane GaN/AlGaN quantum wells.
المؤلفون: Roble AA; Department of Physics and Astronomy, and Photon Science Institute, The University of Manchester, Manchester, M13 9PL, United Kingdom. abas.roble@manchester.ac.uk., Patra SK; Tyndall National Institute, University College Cork, Cork, T12 R5CP, Ireland. sarojkanta.patra@tyndall.ie.; Department of Electrical Engineering, University College Cork, Cork, T12 YN60, Ireland. sarojkanta.patra@tyndall.ie., Massabuau F; Department of Materials Science and Metallurgy, 27 Charles Babbage Road, University of Cambridge, Cambridge, CB3 0FS, United Kingdom., Frentrup M; Department of Materials Science and Metallurgy, 27 Charles Babbage Road, University of Cambridge, Cambridge, CB3 0FS, United Kingdom., Leontiadou MA; Department of Physics and Astronomy, and Photon Science Institute, The University of Manchester, Manchester, M13 9PL, United Kingdom.; School of Science, Engineering and Environment, University of Salford, Salford, Greater Manchester, M5 4WT, United Kingdom., Dawson P; Department of Physics and Astronomy, and Photon Science Institute, The University of Manchester, Manchester, M13 9PL, United Kingdom., Kappers MJ; Department of Materials Science and Metallurgy, 27 Charles Babbage Road, University of Cambridge, Cambridge, CB3 0FS, United Kingdom., Oliver RA; Department of Materials Science and Metallurgy, 27 Charles Babbage Road, University of Cambridge, Cambridge, CB3 0FS, United Kingdom., Graham DM; Department of Physics and Astronomy, and Photon Science Institute, The University of Manchester, Manchester, M13 9PL, United Kingdom., Schulz S; Tyndall National Institute, University College Cork, Cork, T12 R5CP, Ireland.
المصدر: Scientific reports [Sci Rep] 2019 Dec 11; Vol. 9 (1), pp. 18862. Date of Electronic Publication: 2019 Dec 11.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Nature Publishing Group Country of Publication: England NLM ID: 101563288 Publication Model: Electronic Cited Medium: Internet ISSN: 2045-2322 (Electronic) Linking ISSN: 20452322 NLM ISO Abbreviation: Sci Rep Subsets: PubMed not MEDLINE; MEDLINE
أسماء مطبوعة: Original Publication: London : Nature Publishing Group, copyright 2011-
مستخلص: We report on a combined theoretical and experimental study of the impact of alloy fluctuations and Coulomb effects on the electronic and optical properties of [Formula: see text]-plane GaN/AlGaN multi-quantum well systems. The presence of carrier localization effects in this system was demonstrated by experimental observations, such as the "S-shape" temperature dependence of the photoluminescence (PL) peak energy, and non-exponential PL decay curves that varied across the PL spectra at 10 K. A three-dimensional modified continuum model, coupled with a self-consistent Hartree scheme, was employed to gain insight into the electronic and optical properties of the experimentally studied [Formula: see text]-plane GaN/AlGaN quantum wells. This model confirmed the existence of strong hole localization arising from the combined effects of the built-in polarization field along the growth direction and the alloy fluctuations at the quantum well/barrier interface. However, for electrons these localization effects are less pronounced in comparison to the holes. Furthermore, our calculations show that the attractive Coulomb interaction between electron and hole results in exciton localization. This behavior is in contrast to the picture of independently localized electrons and holes, often used to explain the radiative recombination process in [Formula: see text]-plane InGaN/GaN quantum well systems.
التعليقات: Erratum in: Sci Rep. 2020 Mar 24;10(1):5667. (PMID: 32205854)
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معلومات مُعتمدة: 13/SIRG/2210 Ireland SFI_ Science Foundation Ireland; 13/SIRG/2210 Ireland SFI_ Science Foundation Ireland; EP/M010589/1 Engineering and Physical Sciences Research Council; EP/M010589/1 Engineering and Physical Sciences Research Council; EP/M010589/1 Engineering and Physical Sciences Research Council; EP/M010589/1 Engineering and Physical Sciences Research Council; EP/M010589/1 Engineering and Physical Sciences Research Council; IE151046 Royal Society; IE151046 Royal Society; IE151046 Royal Society
تواريخ الأحداث: Date Created: 20191213 Latest Revision: 20210110
رمز التحديث: 20221213
مُعرف محوري في PubMed: PMC6906529
DOI: 10.1038/s41598-019-53693-2
PMID: 31827118
قاعدة البيانات: MEDLINE
الوصف
تدمد:2045-2322
DOI:10.1038/s41598-019-53693-2