Ca1−xMo1−ySiyO4:Eux: A novel red phosphor for white light emitting diodes |
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Authors: | Zhipeng Ci Jiachi Zhang Yunkui Sun |
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Institution: | Department of Materials Science, School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, PR China |
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Abstract: | Single phase of Ca1−xMo1−ySiyO4:Eux3+ (0.18?x?0.26, 0?y?0.04) was synthesized by solid-state method. The photoluminescence investigation indicated that Ca1−xMoO4:Eux3+ (0.18?x?0.26) could be effectively excited by 393 and 464 nm, and it exhibited an intense red emission at 615 nm. The introduction of Si4+ ions did not change the position of the peaks but strongly enhanced the emission intensity of Eu3+ under 393 and 464 nm excitations and showed very good color purity. The emission intensity of optimal Ca0.8Mo0.98Si0.02O4:Eu0.23+ sample (excited by 393 nm) was about 5.5 times higher than that of the phosphor Y2O2S:0.05Eu3+. So this phosphor could be nicely suitable for the application of the UV LED chips. |
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Keywords: | Phosphor LED Molybdate |
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