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15 November 2010 Synthesis of Eu3+ doped yttrium orthosilicate phosphor by sol-combustion method
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Eu3+ doped yttrium orthosilicate (Y2SiO5) phosphor was prepared by the sol-combustion method using citric acid as complexing agent in this experiment. The X-ray diffraction (XRD) pattern, excitation and emission spectra were used to investigate the crystal structure and luminescent properties of the phosphor. XRD pattern showed that pure Y2SiO5:Eu3+ phosphor was obtained. The excitation spectrum was composed of a broad band from 200-350 nm and a series of narrow bands from 350-500 nm, in which the excitation peaks at 400 nm and 470 nm were stronger. The emission spectrum showed the most intense emission peak was located at 613 nm, which corresponded to the 5D07F2 transition of Eu3+. The results showed that this phosphor could be excited by UV or blue light and emit red light. The luminescent intensity depends on the concentration of Eu3+ and it reached the maximum when the molar concentration of Eu3+ was 4 mol%. In this study, we found that the emission intensity reached maximum when the ratio of citric acid and Y3+ was 1.5:1. The results indicated that Y2SiO5:Eu3+ is a potential red-emitting candidate phosphor for white light-emitting diodes.
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Li Guan, Litao Jin, Guoqi Jia, Xu Li, Zhiping Yang, Qinglin Guo, and Guangsheng Fu "Synthesis of Eu3+ doped yttrium orthosilicate phosphor by sol-combustion method", Proc. SPIE 7852, LED and Display Technologies, 78521I (15 November 2010);

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