| Effect of gadolinium incorporation on optical characteristics of YNbO_4：Eu~（3＋） phosphors for lamp applications |
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| 引用本文： | 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 YNbO_4：Eu~（3＋） phosphors for lamp applications[J]. 中国稀土学报(英文版), 2012, 30(3): 205-209. DOI: 10.1016/S1002-0721(12)60024-6 |
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| 作者姓名： | Sung Hwan Choi G. Anoop Dong Wook Suh Kyung Pil Kim Hyun Ju Lee Jae Soo Yoo |
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| 作者单位： | Display Materials Laboratory, School of Chemical Engineering and Materials Science, Chung-Ang University |
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| 基金项目： | supported by the Chung-Ang University Research Scholarship Grants in 2008 (Sung Hwan Choi) |
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| 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.
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| 关 键 词： | YNbO4:Eu oxide phosphors rare earths |
| 收稿时间： | 2011-08-01 |
Effect of gadolinium incorporation on optical characteristics of YNbO4:Eu3+ phosphors for lamp applications |
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| Sung Hwan Choi, G. Anoop, Dong Wook Suh, Kyung Pil Kim, Hyun Ju Lee, Jae Soo Yoo Display Materials Laboratory. Effect of gadolinium incorporation on optical characteristics of YNbO4:Eu3+ phosphors for lamp applications[J]. Journal of Rare Earths, 2012, 30(3): 205-209. DOI: 10.1016/S1002-0721(12)60024-6 |
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| Authors: | Sung Hwan Choi G. Anoop Dong Wook Suh Kyung Pil Kim Hyun Ju Lee Jae Soo Yoo Display Materials Laboratory |
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| 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) |
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| 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. |
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| Keywords: | YNbO4:Eu oxide phosphors rare earths |
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