Eu3+‐activated Y2MoO6: a narrow band red‐emitting phosphor with strong near‐UV absorption |
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Authors: | Xianghong He Danping Bian Hao Wang Jian Xu |
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Affiliation: | School of Chemistry and Environmental Engineering, Jiangsu Teachers University of Technology, , Changzhou, Jiangsu, 213001 People's Republic of China |
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Abstract: | Near‐UV excited narrow line red‐emitting phosphors, Eu3+‐activated Y2MoO6 systems, were synthesized using a simple molten salt reaction. The structure and photoluminescence characteristics were investigated using X‐ray powder diffraction, UV–Vis absorption and fluorescent spectrophotometry. The excitation spectra show strong broad‐band absorptions in the near‐UV to blue light regions which match the radiation of near‐UV light‐emitting diode chips well. Under excitation of either near‐UV or blue light, intense red emission with a main peak of 611 nm is observed, ascribed to the 5D0–7F2 transition of Eu3+ ions; the optimal doping concentration is 20 mol%. The chromaticity coordinates (x = 0.65, y = 0.34) of the as‐obtained phosphor are very close to the National Television Standard Committee standard values (x = 0.67, y = 0.33). All these characteristics suggest that this material is a promising red‐emitting phosphor candidate for white‐LEDs based on near‐UV LED chips. Copyright © 2012 John Wiley & Sons, Ltd. |
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Keywords: | Eu3+‐activated Y2MoO6 phosphor red‐emitting narrow band near‐UV absorption white‐LEDs |
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