Photoluminescence investigation of rare-earth activated GdCa{sub 3}(GaO){sub 3}(BO{sub 3}){sub 4} phosphors under UV excitation
- Advanced Materials Division, Korea Research Institute of Chemical Technology, P.O. Box 107, Yuseong, Daejeon 305-600 (Korea, Republic of)
- Department of Materials Science and Engineering, Korea University, Anam-dong, Seongbuk, Seoul 136-701 (Korea, Republic of)
A borate compound was adopted as a new host material of Eu{sup 3+} and Tb{sup 3+} activators to fabricate efficient luminescence materials. The phosphor compositions, Gd{sub 1-x}Eu{sub x}Ca{sub 3}(GaO){sub 3}(BO{sub 3}){sub 4} and Gd{sub 1-x}Tb{sub x}Ca{sub 3}(GaO){sub 3}(BO{sub 3}){sub 4}, were synthesized by conventional solid-state reactions. The crystalline phases of the resulting powders were identified using an X-ray diffraction system. Their photoluminescence properties were investigated under long-wavelength UV excitation. The Eu{sup 3+}-doped and Tb{sup 3+}-doped GdCa{sub 3}(GaO){sub 3}(BO{sub 3}){sub 4} phosphors efficiently emitted red and green light, respectively. The temperature dependency of emission intensity was measured in a range from room temperature to 150 deg. C. The emission intensities of the red and green phosphors at 150 deg. C are 87% and 91% of those at room temperature, respectively. In addition, the decay times of both the red and green phosphors are shorter than 3 ms.
- OSTI ID:
- 21199727
- Journal Information:
- Materials Research Bulletin, Vol. 44, Issue 4; Other Information: DOI: 10.1016/j.materresbull.2008.09.015; PII: S0025-5408(08)00321-8; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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