Study on the Preparation of Red Phosphor R2-x(MoO4)3:xEu3+ (R=Y, Gd) by Solid-State Reaction Method

doi:10.7517/j.issn.1674-0475.2012.05.338

Imaging Science and Photochemistry ›› 2012, Vol. ›› Issue (5): 338-346.DOI: 10.7517/j.issn.1674-0475.2012.05.338

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Study on the Preparation of Red Phosphor R_2-x(MoO₄)₃:xEu³⁺ (R=Y, Gd) by Solid-State Reaction Method

HU Jin-jiang¹, ZHANG Li-gang^1,2, XIE Ge-ying¹, LI Chen-pu¹, QU Jiao¹, FAN Hong¹, MA Li-hong¹

1. Department of Mathematics and Physics, Hebei Institue of Architecture and Civil Engineering, Zhangjiakou, 075024, Hebei, P. R. China;
2. Key Laboratory of Luminescence and Optical Information, Ministry of Education, School of Science, Beijing Jiaotong University, Beijing 10044, P. R. China

Received:2012-02-29 Revised:2012-05-03 Online:2012-09-15 Published:2012-05-25

Abstract

Abstract: A red emitting phosphor R_2-x(MoO₄)_3:xEu³⁺(R=Y, Gd) was synthesized by solid-state reaction. The effects of the sinter temperature, flux content and Eu³⁺ doping concentration on luminescent properties were studied by XRD and photoluminescence (PL) spectra. The results indicated that the Gd_0.6(MoO₄)₃:1.4Eu³⁺ have two structures, monoclinic in 800℃ and the orthorhombic in 950℃, but there is only the orthorhombic in Y_0.2(MoO₄)₃:1.8Eu³⁺ preparaed in 800℃ and 1000℃. The intensity will reach the strongest of Gd_0.6(MoO₄)₃:1.4Eu³⁺ and Y_0.2(MoO₄)₃:1.8Eu³⁺ when the NH₄Cl is the appropriate flux and its most suitable mass fraction is 3%, the sinter temperature is 1000℃ and sinter time is 3 h. The results show that this phosphor can be excited by UV light of 395 nm and blue light of 465 nm, also emit red light at about 612 nm, which attribute to the intrinsic transition from ⁵D₀ to ⁷F₂ of Eu³⁺. The phosphor may be a better phosphor candidate for solid-state lighting applications.

Key words: red phosphor, solid-state reaction, light-emitting diode(LED), excitation spectrum, emission spectrum

CLC Number:

HU Jin-jiang, ZHANG Li-gang, XIE Ge-ying, LI Chen-pu, QU Jiao, FAN Hong, MA Li-hong. Study on the Preparation of Red Phosphor R_2-x(MoO₄)₃:xEu³⁺ (R=Y, Gd) by Solid-State Reaction Method[J]. Imaging Science and Photochemistry, 2012, (5): 338-346.

References

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Study on the Preparation of Red Phosphor R_2-x(MoO₄)₃:xEu³⁺ (R=Y, Gd) by Solid-State Reaction Method

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