| 학회 |
한국재료학회 |
| 학술대회 |
2013년 가을 (11/06 ~ 11/08, 제주롯데호텔) |
| 권호 |
19권 2호 |
| 발표분야 |
F. 광기능/디스플레이 재료(Optical Functional and Display Materials) |
| 제목 |
Preparation of spherical YAG:Ce phosphor particles by liquid-phase synthesis |
| 초록 |
Recently, some researches about the phosphor synthesis have been focused on the preparation of spherical particles with small particle size in order to improve efficiency as reducing the amount of light scattering at surface and increasing the packing density. In this sturdy, cerium-doped yttrium aluminum garnet (YAG:Ce) phosphor was synthesized by the liquid-phase synthesis using a forced hydrolysis reaction. In the reaction, the used solvent was a mixed solution of alcohol and water. As a precipitant for precipitation of Y, Al and Ce, excess urea was used. The crystal structure of the synthesized phosphor was identified by X-ray powder diffraction (XRD) and the morphology was observed by FE-SEM. The photoluminescence properties for the phosphors under UV excitation were investigated. According to the volume ratio of alcohol to water, the morphology of particles was largely influenced. By the optimized process, the spherical precursor particles with submicron diameter were formed at the 4~5 ratio of the alcohol/water solvent. The single phase of YAG:Ce phosphor was obtained with calcination at 1100℃. From the measured PL spectrum, it was observed that the spherical YAG:Ce phosphor emits yellow light peaked at around 560 nm, which is consistent with typical emission pattern of YAG:Ce phosphor. |
| 저자 |
Seongsoo Park1, Sungho Choi2, Sahn Nahm3, Ha-Kyun Jung4
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| 소속 |
1Department of Material Science and Engineering, 2Korea Univ., 3Advanced Materials Division, 4Korea Research Institute of Chemical Technology |
| 키워드 |
phosphor; YAG:Ce; spherical
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| E-Mail |
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