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Indexed by:期刊论文

Date of Publication:2019-04-01

Journal:AIP ADVANCES

Included Journals:SCIE、EI

Volume:9

Issue:4

Page Number:045004

ISSN No.:2158-3226

Key Words:Atomic physics; Binding energy; Excited states; II-VI semiconductors; Luminescence; Point defects; Semiconductor quantum wells; Temperature; Transition metals; Zinc oxide, Donor and acceptor; Exciton resonances; Internal transitions; Low temperatures; Native point defects; Red luminescence; Structure defects; Transition metal elements, Excitons

Abstract:The RL can be extremely enhanced at the incident frequency in resonance with the donor exciton and the intensities of some adjacent lines separated by similar to 4 meV are thermally populated with the increase in temperature. The new structured RL was studied in the terms of photoluminescence (PL) and PL excitation spectra and the origin was discussed taking into account the internal transitions of transition metal elements, structure defects, and native point defects. There is a great possibility that the new structured RL arises from the excited states converted from bound excitons, for example, the excitons or the electron and hole pairs bounded by the donor and acceptor pairs (DAPs) of O and Zn vacancies, because the binding energy determined by the equation of DAP fluorescence is highly in accordance with the theoretic values reported in the literature. (C) 2019 Author(s).