A novel yellow phosphor for white light emitting diodes

doi:10.1088/1674-1056/19/1/017801

中国物理B ›› 2010, Vol. 19 ›› Issue (1): 17801-017801.doi: 10.1088/1674-1056/19/1/017801

A novel yellow phosphor for white light emitting diodes

王志军, 李盼来, 杨志平, 郭庆林, 李旭

College of Physics Science & Technology, Hebei University, Baoding 071002, China

收稿日期:2009-01-31 修回日期:2009-05-04 出版日期:2010-01-15 发布日期:2010-01-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 50902042), the Natural Science Foundation of Hebei Province, China (Grant No. E2009000209) and the Research Foundation fo Education Bureau of Hebei Province, China (Grant No. 2009313).

A novel yellow phosphor for white light emitting diodes

Wang Zhi-Jun(王志军)^†, Li Pan-Lai(李盼来), Yang Zhi-Ping(杨志平), Guo Qing-Lin(郭庆林), and Li Xu(李旭)

College of Physics Science & Technology, Hebei University, Baoding 071002, China

Received:2009-01-31 Revised:2009-05-04 Online:2010-01-15 Published:2010-01-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 50902042), the Natural Science Foundation of Hebei Province, China (Grant No. E2009000209) and the Research Foundation fo Education Bureau of Hebei Province, China (Grant No. 2009313).

摘要/Abstract

摘要： This paper reports that a novel yellow phosphor, LiSrBO₃:Eusup>2+, was synthesized by the solid-state reaction. The excitation and emission spectra indicate that this phosphor can be effectively excited by ultraviolet (360 and 400~nm) and blue (425 and 460~nm) light, and exhibits a satisfactory yellow performance (565~nm). The role of concentration of Eusup>2+ on the emission intensity in LiSrBO₃ is studied, and it is found that the critical concentration is 3 mol\%, and the concentration self-quenching mechanism is the dipole--dipole interaction according to the Dexter theory. White light emitting diodes were generated by using an InGaN chip (460~nm or 400~nm) with LiSrBO₃:Eusup>2+ phosphor, the CIE chromaticity is (x=0.341, y=0.321) and (x=0.324, y=0.318), respectively. Therefore, LiSrBO₃:Eusup>2+ is a promising yellow phosphor for white light emitting diodes.

Abstract: This paper reports that a novel yellow phosphor, LiSrBO₃:Eu²⁺, was synthesized by the solid-state reaction. The excitation and emission spectra indicate that this phosphor can be effectively excited by ultraviolet (360 and 400 nm) and blue (425 and 460 nm) light, and exhibits a satisfactory yellow performance (565 nm). The role of concentration of Eu²⁺ on the emission intensity in LiSrBO₃ is studied, and it is found that the critical concentration is 3 mol%, and the concentration self-quenching mechanism is the dipole--dipole interaction according to the Dexter theory. White light emitting diodes were generated by using an InGaN chip (460 nm or 400 nm) with LiSrBO₃:Eu²⁺ phosphor, the CIE chromaticity is (x = 0.341, y = 0.321) and (x = 0.324, y = 0.318), respectively. Therefore, LiSrBO₃:Eu²⁺ is a promising yellow phosphor for white light emitting diodes.

Key words: luminescence, white light emitting diodes, LiSrBO₃:Eu²⁺

中图分类号: (Light-emitting devices)

85.60.Jb

61.72.S- (Impurities in crystals) 78.55.Hx (Other solid inorganic materials) 81.20.-n (Methods of materials synthesis and materials processing)

王志军, 李盼来, 杨志平, 郭庆林, 李旭. A novel yellow phosphor for white light emitting diodes[J]. 中国物理B, 2010, 19(1): 17801-017801.

Wang Zhi-Jun(王志军), Li Pan-Lai(李盼来), Yang Zhi-Ping(杨志平), Guo Qing-Lin(郭庆林), and Li Xu(李旭). A novel yellow phosphor for white light emitting diodes[J]. Chin. Phys. B, 2010, 19(1): 17801-017801.

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A novel yellow phosphor for white light emitting diodes

A novel yellow phosphor for white light emitting diodes

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