Synthesis of Li-Ta-Ti-O new red phosphors with Mn4+ as activator and the relationship between photoluminescence intensity and crystal structure
Open Access
- 1 June 2020
- journal article
- research article
- Published by Ceramic Society of Japan in Journal of the Ceramic Society of Japan
- Vol. 128 (6), 317-321
- https://doi.org/10.2109/jcersj2.20007
Abstract
In the Li2O-Ta2O5-TiO2 system, Li1+x-yTa1-x-3yO3 (0.14 <= x <= 0.175, 0.04 <= y <= 0.175) forms a superstructure by periodical insertion of an intergrowth layer in a matrix having a trigonal structure. In this study, to apply this unique structure as a host material of phosphor, new phosphors with a red emission color were synthesized by doping Mn4+ ion. The phosphor emitted at around 685 nm excited by 493 nm. The photoluminescence (PL) intensity closely related to the ratio of Mn4+/Mn3+ ion because the ratio changed by sintering temperature andjor Ti content in the matrix. The relationship between PL intensity and crystal structure was investigated using X-ray diffraction, a transmission electron microscope, and X-ray absorption fine structure. (C) 2020 The Ceramic Society of Japan. All rights reserved.Keywords
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