Photoluminescence properties of Ce3+ and Mn2+-activated Ba9Sc2Si6O24 phosphor for white light emitting diodes

doi:10.1088/1674-1056/22/7/077801

Abstract A single-phased silicate compound (Ba_1-xCe_x)₉₍Sc_1-yMn_y)₂Si₆O₂₄ was prepared by solid-state reaction at high temperature. From powder X-ray diffraction (XRD) analysis, the formation of Ba₉Sc₂Si₆O₂₄ with R3 space group was confirmed. In the photoluminescence spectra under ultraviolet (UV) ray excitation, the Ba₉Sc₂Si₆O₂₄:Ce³⁺, Mn²⁺ phosphor emits two distinctive color light bands: a blue one originating from Ce³⁺ and a red one caused by Mn²⁺. The energy transfer process from Ce³⁺ to Mn²⁺ was confirmed, the critical radius as well as the transfer efficiency was calculated, and the energy transfer mechanism was discussed. In addition, the decay-time testing indicates that the energy transfer efficiencies from Ce(1) to Mn²⁺ and Ce(2) to Mn²⁺ are different. The emission chromaticity of Ba₉Sc₂Si₆O₂₄:Ce³⁺, Mn²⁺ phosphor could be tuned from blue to red by altering the Ce³⁺/Mn²⁺ concentration ratio.

Keywords: Ba₉Sc₂Si₆O₂₄ Ce³⁺ Mn²⁺ co-doped energy transfer

Received: 26 January 2013
Revised: 04 March 2013
Accepted manuscript online:

PACS:	78.55.-m	(Photoluminescence, properties and materials)
	87.15.mq	(Luminescence)
	33.50.-j	(Fluorescence and phosphorescence; radiationless transitions, quenching (intersystem crossing, internal conversion))

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51272027) and the Ph. D. Program Foundation of Education Ministry of China (Grant No. 20100006110011).

Corresponding Authors: Liu Quan-Lin
E-mail: qlliu@ustb.edu.cn

Cite this article:

Bian Liu (边柳), Wang Ting (王婷), Song Zhen (宋振), Liu Zhao-Hui (刘朝晖), Li Jia-Xu (李嘉旭), Liu Quan-Lin (刘泉林) Photoluminescence properties of Ce³⁺ and Mn²⁺-activated Ba₉Sc₂Si₆O₂₄ phosphor for white light emitting diodes 2013 Chin. Phys. B 22 077801

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Photoluminescence properties of Ce3+ and Mn2+-activated Ba9Sc2Si6O24 phosphor for white light emitting diodes

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Photoluminescence properties of Ce³⁺ and Mn²⁺-activated Ba₉Sc₂Si₆O₂₄ phosphor for white light emitting diodes