| 학회 | 한국재료학회 |
| 학술대회 | 2016년 가을 (11/16 ~ 11/18, 경주 현대호텔) |
| 권호 | 22권 2호 |
| 발표분야 | F. 광기능/디스플레이 재료 분과 |
| 제목 | NIR to visible up-conersion luminescence characteristics of LaVO4:Er3+,Yb3+ Phosphors |
| 초록 | The Er3+ and Yb3+ co-doped LaVO4 phosphors were synthesized by the facile solid state reaction method. Er3+ ions concentrations were changed from 0.01 to 0.2 mol for the fixed Yb3+ ions concentration at 0.15 mol. The crystalline structures of the phosphors were investigated by X-ray diffraction (XRD). The composition of the phosphors was investigated by X-ray photoelectron spectroscopy (XPS) analysis. The grain size of phosphors was around 582 nm ~ 877 nm and shape was angular oval observed by scanning electron microscopy (SEM). The photoluminescence emissions based on the blue emission near 466 nm and green emission near 553 nm were observed and the highest emission intensity occurred for the sample LaVO4:Yb0.15, Er0.20. The green and red up-conversion emissions were observed in Er3+, Yb3+ co-doped LaVO4 phosphors under the excitation of 980 nm laser diode. The phosphors appeared the up-conversion emission based on the green emission near 525 nm, 553 nm and 545 nm radiated by 2H11/2 → 4I15/2 and 4S3/2 → 4I15/2 transitions and red emission about 660 nm and 668 nm radiated by 4F9/2 → 4I15/2 transition, which assigned to the intra 4f transitions of Er3+ ions. *E-mail: [email protected] *Tel: +82-10-2834-5982 |
| 저자 | 이성수, 신상수, 김대일, 최인국, 성민혁, 김원재 |
| 소속 | 신라대 |
| 키워드 | crystallinity; photoluminescence; up-conversion; LaVO<SUB>4</SUB>; phosphor |
