| Effect of gadolinium incorporation on optical characteristics of YNbO_4：Eu~（3＋） phosphors for lamp applications |
| |
| 作者姓名： | Sung Hwan Choi G. Anoop Dong Wook Suh Kyung Pil Kim Hyun Ju Lee Jae Soo Yoo |
| |
| 作者单位： | Display Materials Laboratory, School of Chemical Engineering and Materials Science, Chung-Ang University |
| |
| 基金项目： | supported by the Chung-Ang University Research Scholarship Grants in 2008 (Sung Hwan Choi) |
| |
| 摘 要： | Eu3+-doped (Y,Gd)NbO4 phosphor was synthesized by solid-state reaction for possible application in cold cathode fluorescent lamps. A broad absorption band with peak maximum at 272 nm was observed which was due to the charge transfer between Eu3+ ions and neighboring oxygen anions. A deep red emission at the peak wavelength of 612 nm was observed which could be attributed to the 5D0→7F2 transition in Eu3+ ions. The highest luminance for Y1-x-yGdyNbO4:Eux3+ under 254 nm excitation was achieved at Eu3+ concentration of 18 mol.% (x=0.18) and Gd3+ concentration of 8.2 mol.% (y=0.082). The luminance of Y0.738Gd0.082NbO4:Eu3+0.18 was higher than that of a typical commercial phosphor Y2O3:Eu3+ and the CIE chromaticity coordinate was (0.6490, 0.3506), which was deeper than that of Y2O3:Eu3+. The particle size of the synthesized phosphors was controlled by the NaCl flux and particle size as high as 8 μm with uniform size distribution of particles was obtained.
|
| 关 键 词： | YNbO4:Eu oxide phosphors rare earths |
| 收稿时间： | 1 August 2011 |
Effect of gadolinium incorporation on optical characteristics of YNbO4:Eu3+ phosphors for lamp applications |
| |
| Sung Hwan Choi,G. Anoop,Dong Wook Suh,Kyung Pil Kim,Hyun Ju Lee,Jae Soo Yoo.Effect of gadolinium incorporation on optical characteristics of YNbO4:Eu3+ phosphors for lamp applications[J].Journal of Rare Earths,2012,30(3):205-209. |
| |
| Authors: | Sung Hwan Choi G Anoop Dong Wook Suh Kyung Pil Kim Hyun Ju Lee Jae Soo Yoo Display Materials Laboratory |
| |
| Affiliation: | Sung Hwan Choi, G. Anoop, Dong Wook Suh, Kyung Pil Kim, Hyun Ju Lee, Jae Soo Yoo (Display Materials Laboratory, School of Chemical Engineering and Materials Science, Chung-Ang University, Heukseok-Dong 221, Dongjak-gu, Seoul 156-756, Korea) |
| |
| Abstract: | Eu3+-doped (Y,Gd)NbO4 phosphor was synthesized by solid-state reaction for possible application in cold cathode fluorescent lamps. A broad absorption band with peak maximum at 272 nm was observed which was due to the charge transfer between Eu3+ ions and neighboring oxygen anions. A deep red emission at the peak wavelength of 612 nm was observed which could be attributed to the 5D0→7F2 transition in Eu3+ ions. The highest luminance for Y1–x–yGdyNbO4:Eux3+ under 254 nm excitation was achieved at Eu3+ concentration of 18 mol.% (x=0.18) and Gd3+ concentration of 8.2 mol.% (y=0.082). The luminance of Y0.738Gd0.082NbO4:Eu3+0.18 was higher than that of a typical commercial phosphor Y2O3:Eu3+ and the CIE chromaticity coordinate was (0.6490, 0.3506), which was deeper than that of Y2O3:Eu3+. The particle size of the synthesized phosphors was controlled by the NaCl flux and particle size as high as 8 μm with uniform size distribution of particles was obtained. |
| |
| Keywords: | YNbO4:Eu oxide phosphors rare earths |
| 本文献已被 CNKI 维普 ScienceDirect 等数据库收录！ |
