| 학회 | 한국재료학회 |
| 학술대회 | 2014년 가을 (11/27 ~ 11/28, 대전컨벤션센터) |
| 권호 | 20권 2호 |
| 발표분야 | F. 광기능/디스플레이 재료(Optical Functional and Display Materials) |
| 제목 | Microwave-assisted hydrothermal synthesis of Indium-doped YAG:Ce phosphors |
| 초록 | In white light generation, combining GaN-based blue LED chip and yellow-emitting phosphor is highly recommendable. The cerium-doped yttirium aluminum garnet (Y3Al5O12:Ce3+, YAG :Ce) phosphor is most widely used yellow-emitting component due to the strong absorption in the blue region. Therefore, YAG :Ce phosphor is essential and the quality of it has a great effect on the luminescence properties of wLEDs. There are diverse methods in synthesizing highly efficient YAG :Ce phosphor. Among them, the microwave-assisted hydrothermal synthesis is one of the useful methods in preparing phosphor materials. The synthetic route is simple and fast, which is economically advantageous, and the uniformity due to the reaction process occurred on molecular level can be achieved. In this study, the Indium-doped YAG:Ce phosphors were successively synthesized by microwave-assisted hydrothermal method and their photoluminescence properties were investigated. The luminance of YAG:Ce phosphors were increased by doping In3+ ions on Al3+ sites. The synthetic conditions such as reaction and annealing temperature were controlled to enhance luminance of Indium-doped YAG:Ce phosphors. The obtained Indium-doped YAG:Ce phosphors exhibited broad emission spectrum in the wavelength range of 480 to 750 nm, peaked at 536 nm under 467 nm excitation, based on the 5d-4f transition of Ce3+. The concentration of In3+ dopant was optimized. |
| 저자 | 우미혜, 최성호, 정하균 |
| 소속 | 한국화학(연) |
| 키워드 | YAG:Ce; phosphor; Microwave |
