Near-infrared downconversion in Eu2+ and Pr3+ co-doped KSrPO4 phosphor

doi:10.1088/1674-1056/22/5/057803

Abstract A novel near-infrared (NIR) downconversion (DC) phosphor KSrPO₄:Eu²⁺, Pr³⁺ is synthesized by the conventional high temperature solid-state reaction. The Eu²⁺ acts as an efficient sensitizer for Pr³⁺ in the KSrPO₄ host. With broadband near-ultraviolet light excitation induced by the 4f→5d transition of Eu²⁺, the characteristic NIR emission of Pr³⁺, peaking at 974 nm and 1019 nm due to ³P₀ →¹G₄ and ¹G₄ →³H₄ transitions, is generated as a result of the energy transfer from Eu²⁺ to Pr³⁺. The luminescence spectra in both the visible and the NIR regions and the decay lifetime curves of Eu²⁺ prove the energy transfer from Eu²⁺ to Pr³⁺. This Eu²⁺ and Pr³⁺ co-doped KSrPO₄ phosphor may be a promising candidate to modify the spectral mismatch behavior of crystalline solar cells and sunlight.

Keywords: optical properties cooperative energy transfer downconversion

Received: 01 June 2012
Revised: 09 October 2012
Accepted manuscript online:

PACS:	78.55.-m	(Photoluminescence, properties and materials)
	61.05.cp	(X-ray diffraction)
	33.50.Dq	(Fluorescence and phosphorescence spectra)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 20976002), the Beijing Natural Science Foundation, China (Grant No. 2122012), and the Special Funding of the Ministry of Education of Guangdong Province, China (Grant No. 2011B090400100).

Corresponding Authors: Sun Jia-Yue
E-mail: jiayue_sun@126.com

Cite this article:

Sun Jia-Yue (孙家跃), Sun Yi-Ning (孙翊宁), Zhu Ji-Cheng (朱吉成), Zeng Jun-Hui (曾军辉), Du Hai-Yan (杜海燕) Near-infrared downconversion in Eu²⁺ and Pr³⁺ co-doped KSrPO₄ phosphor 2013 Chin. Phys. B 22 057803

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Near-infrared downconversion in Eu2+ and Pr3+ co-doped KSrPO4 phosphor

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Near-infrared downconversion in Eu²⁺ and Pr³⁺ co-doped KSrPO₄ phosphor