Near-infrared downconversion in Eu2+and Pr3+co-doped KSrPO4phosphor
Authors:
- Jia-Yue SunJSJia-Yue Sun
- Yi-Ning SunYSYi-Ning Sun
- Ji-Cheng ZhuJZJi-Cheng Zhu
- Jun-Hui ZengJZJun-Hui Zeng
- Hai-Yan DuHDHai-Yan Du
- 1 May 2013
- journal article
- Published by IOP Publishing in Chinese Physics B
- Vol. 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
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