A novel strong green phosphor：K3Gd(PO4)2：Ce3+, Tb3+ for a UV-excited white light-emitting-diode

doi:10.1088/1674-1056/23/2/028505

Abstract A series of K₃Gd_1-x-y(PO₄)₂:xCe³⁺, yTb³⁺ phosphors are synthesized by the solid-sate reaction method. X-ray diffraction and photoluminescence spectra are utilized to characterize the structures and luminescence properties of the as-synthesized phosphors. Co-doping of Ce³⁺ enhances the emission intensity of Tb³⁺ greatly through an efficient energy transfer process from Ce³⁺ to Tb³⁺. The energy transfer is confirmed by photoluminescence spectra and decay time curves analysis. The efficiency and mechanism of energy transfer are investigated carefully. Moreover, due to the non-concentration quenching property of K₃Tb(PO₄)₂, the photoluminescence spectra of K₃Tb_1-x(PO4)₂:xCe³⁺ are studied and the results show that when x=0.11 the strongest Tb³⁺ green emission can be realized.

Keywords: K₃Gd(PO₄)₂：Ce³⁺ Tb³⁺ energy transfer photoluminescence

Received: 20 May 2013
Revised: 14 June 2013
Accepted manuscript online:

PACS:	85.60.Jb	(Light-emitting devices)
	78.55.Bq	(Liquids)
	75.55.Hx

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11204113, 61265004, and 51272097), the Foundation of Application Research of Yunnan Province, China (Grant No. 2011FB022), the Chinese Specialized Research Fund for the Doctoral Program of Higher Education (Grant No. 20115314120001), the Postdoctoral Science Foundation of China (Grant No. 2011M501424), and the National Basic Research Program of China (Grant No. 2011CB211708).

Corresponding Authors: Qiu Jian-Bei
E-mail: qiu@kmust.edu.cn

About author: 85.60.Jb; 78.55.Bq; 75.55.Hx

Cite this article:

Jiang Ting-Ming (姜庭明), Yu Xue (余雪), Xu Xu-Hui (徐旭辉), Zhou Da-Cheng (周大成), Yu Hong-Ling (余红玲), Yang Peng-Hui (杨鹏辉), Qiu Jian-Bei (邱建备) A novel strong green phosphor：K₃Gd(PO₄)₂：Ce³⁺, Tb³⁺ for a UV-excited white light-emitting-diode 2014 Chin. Phys. B 23 028505

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A novel strong green phosphor：K3Gd(PO4)2：Ce3+, Tb3+ for a UV-excited white light-emitting-diode

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A novel strong green phosphor：K₃Gd(PO₄)₂：Ce³⁺, Tb³⁺ for a UV-excited white light-emitting-diode