Photoluminescence investigation of rare-earth activated GdCa3(GaO)(3)(BO3)(4) phosphors under UV excitation
- Authors
- Kyung, Hyun-Ai; Choi, Sungho; Seong, Tae-Yeon; Jung, Ha-Kyun
- Issue Date
- 2-4월-2009
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Optical materials; Electronic materials; Luminescence
- Citation
- MATERIALS RESEARCH BULLETIN, v.44, no.4, pp.789 - 792
- Indexed
- SCIE
SCOPUS
- Journal Title
- MATERIALS RESEARCH BULLETIN
- Volume
- 44
- Number
- 4
- Start Page
- 789
- End Page
- 792
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/120255
- DOI
- 10.1016/j.materresbull.2008.09.015
- ISSN
- 0025-5408
- Abstract
- A borate compound was adopted as a new host material of Eu3+ and Tb3+ activators to fabricate efficient luminescence materials. The phosphor compositions, Gd1-xEuxCa3(GaO)(3)(BO3)(4) and Gd1-xTbxCa3(-Ca-3(GaO)(3)(BO3)(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 Eu3+-doped and Tb3+-doped GdCa3(-GaO)(3)(BO3)(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 degrees C. The emission intensities of the red and green phosphors at 150 degrees 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. (C) 2008 Elsevier Ltd. All rights reserved.
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