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RECa4O(BO3)3 thin films as new Luminescent materials screened by the combinatorial method |
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| Authors: | Hiroyuki Sano Takahiro Matsumoto Hideomi Koinuma |
| Institution: | a Research and Development Center, Stanley Electric Corporation, 1-3-1 Eda-nishi, Aoba-ku, Yokohama 225-0014, Japan b Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan c Frontier Collaborative Research Center, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan |
| Abstract: | A new phosphor material, Y1−xTbxCa4O(BO3)3 (0≤x≤1) film was grown on SiO2 substrates by the combinatorial pulsed laser deposition (PLD) method, which enabled us to fabricate continuous composition spread film libraries. Photoluminescence (PL) and PL decay were measured for these film libraries to identify the optimum composition as well as to determine the luminescence mechanism. The film libraries showed strong dependence of luminescence intensities on the chemical composition of Tb ion. The optimum concentration of Tb ions in Y1−xTbxCa4O(BO3)3 was experimentally and theoretically determined to be x=0.2-0.3. |
| Keywords: | Y1&minus xTbxCa4O(BO3)3 Combinatorial pulsed laser deposition method Composition spread Luminescence |
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