Journal
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
Volume 7, Issue 1, Pages R3158-R3162Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.0191801jss
Keywords
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Funding
- Recruitment Program of High-end Foreign Experts [GDW20145200225]
- Programme for the Foreign Experts offered by Chongqing University of Posts and Telecommunications, Ministry of Education and Research of Estonia [PUT430]
- European Regional Development Fund [TK141]
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The optical properties of Mn4+ (3d(3)) in the double perovskites, La2LiSbO6 and La2MgTiO6, are investigated. The Mn4+ energy levels are calculated using the exchange charge model of crystal-field theory and compared with the experimental spectroscopic data. A comparative study of the optical properties of Mn4+ in the perovskite structure shows that energy of the E-2(g) -> (4)A(2g) emission transition is determined by octahedral site distortion. The greater is the site distortion, the lower is the Mn-O covalent interaction and the higher is the energy of the E-2(g) -> (4)A(2g) emission transition. The work provides guidelines for the development of deep red emitting phosphors for agricultural (horticultural) applications. (c) The Author(s) 2017. Published by ECS. All rights reserved.
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