Density functional studies of defects and defect-related luminescence in
Journal Article
·
· Physical Review Materials
- Beihang Univ. (China). Dept. of Physics
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
is a promising material for light-emitting-diode applications. However, the microscopic origin of the broad yellow photoluminescence in remains unknown. In this study, defect properties and defect-related optical transitions are investigated based on the hybrid functional calculation. Our results show that the nitrogen vacancy introduces multiple localized defect states within the band gap, which play a dominant role in luminescent properties of . Common impurities like hydrogen, oxygen, and carbon and their complexes with native defects are also studied. Compared with isolated -H and complexes have shallower transition levels. Our calculated optical excitation and emission peaks associated with isolated are in good agreement with those observed in experiments. In addition, the impurity is also a potential source for the observed yellow emission in .
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1649414
- Journal Information:
- Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 6 Vol. 4; ISSN 2475-9953
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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