Influence of composition on the emission properties of impurities in solids: Case study of Mg1-xZnxAl2O4:Cr3+ with the spinel structure(Article)
- aCenter of Excellence for Photoconversion, Vinča Institute of Nuclear Sciences – National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
- bCurrent Chemicals, Cleveland, OH 44110, United States
- cSchool of Optoelectronic Engineering & CQUPT-BUL Innovation Institute, Chongqing University of Posts and Telecommunications, Chongqing, China
- dInstitute of Physics, University of Tartu, W. Ostwald Str. 1, Tartu, Estonia
- eFaculty of Science and Technology, Jan Długosz University, Armii Krajowej 13/15, Częstochowa, Poland
- fAcademy of Romanian Scientists, Ilfov Str. No. 3, Bucharest, Romania
Abstract
The importance of structural disorder of crystal lattice for the formation of the optical properties of impurity ions is studied by evaluating the optical properties of Cr3+ impurity ions in Mg1-xZnxAl2O4:Cr3+ (x = 0; 0.25; 0.50; 0.75; 1.0) spinel solid solutions. It is demonstrated that the gradual replacement of Zn by Mg, which transforms the normal spinel ZnAl2O4 into the inverse spinel MgAl2O4, leads to an enhancement of the Cr3+ red emission. In addition, the Cr3+ decay rate (inverse to the emitting excited state lifetime) increases linearly when Zn is gradually replaced by Mg. These observations are explained by the lifting of the parity selection rule due to the random distribution of the Zn and Mg cations in the second coordination sphere around the emitting ion, which lowers the local symmetry at the impurity ion site. The strategy of deliberately creating disorder in the crystalline lattice is a successful way of increasing brightness and decreasing the excited state lifetime of the impurity ions, which can be applied for improving emission properties of the phosphor materials used in solid state lighting. © 2023 Elsevier B.V.
Indexed keywords
| Engineering controlled terms: | Chromium compoundsCrystal impuritiesCrystal structureExcited statesIonsMagnesiumOptical latticesOptical propertiesSite selectionZinc |
|---|---|
| Engineering uncontrolled terms | Case-studiesCr 3+Cr3+Crystals structuresEmission propertiesExcited state lifetimesImpurities inImpurity ionsSpinel structureStructural disorders |
| Engineering main heading: | Aluminum compounds |
Funding details
| Funding sponsor | Funding number | Acronym |
|---|---|---|
| Narodowe Centrum Nauki | PPN/BCN/2019/1/00028,2018/31/B/ST4/00924 | NCN |
| W2017011 | ||
| Chongqing University of Posts and Telecommunications | DL2021035001L | CUPT |
| Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja | 451-03-47/2023–01/20001 7 | MPNTR |
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1
Authors from Vin\u010Da Institute would like to acknowledge funding of the Ministry of Science, Technological Development, and Innovation of the Republic of Serbia under contract 451-03-47/2023\u201301/20001 7. M.G.B. also appreciates the supports from the Program for the Foreign Experts (Grant No. W2017011 ) offered by Chongqing University of Posts and Telecommunications , the National Foreign Experts Program for \u201CBelt and Road Initiative\u201D Innovative Talent Exchange (Grant No. DL2021035001L ), NCN project 2018/31/B/ST4/00924 and NAWA project PPN/BCN/2019/1/00028 .
- ISSN: 00222313
- CODEN: JLUMA
- Source Type: Journal
- Original language: English
- DOI: 10.1016/j.jlumin.2023.120190
- Document Type: Article
- Publisher: Elsevier B.V.
Brik, M.G.; Center of Excellence for Photoconversion, Vinča Institute of Nuclear Sciences – National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia;
© Copyright 2023 Elsevier B.V., All rights reserved.
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