A single Eu2+ -activated high-color-rendering oxychloride white-light phosphor for white-light-emitting diodes

Light, Science & Applications
Peng-Peng DaiYi-Chun Liu

Abstract

Single-phased, high-color-rendering index (CRI) white-light phosphors are emerging as potential phosphor-converted white-light-emitting diodes (WLEDs) and as an alternative to blends of tricolor phosphors. However, it is a challenge to create a high CRI white light from a single-doped activator. Here, we present a high CRI (Ra = 91) white-light phosphor, Sr5(PO4)3-x(BO3)xCl:Eu2+, composed of Sr5(PO4)3Cl as the beginning member and Sr5(BO3)3Cl as the end member. This work utilized the solid-solution method, and tunable Eu2+ emission was achieved. Color-tunable Eu2+ emissions in response to structural variation were observed in Sr5(PO4)3-x(BO3)xCl solid solutions. This was further confirmed using X-ray Rietveld refinement, electron paramagnetic resonance spectroscopy, and in the photoluminescence spectra. The color-tunable emissions included the white light that originated from the combination of the blue emission of Sr5(PO4)3Cl:Eu2+ and an induced Eu2+ yellow emission at approximately 550 nm in the solid solution. Importantly, the white-light phosphors showed a greater R9 = 90.2 under excitation at 365 nm. This result has rarely been reported in the literature and is greater than that of (R9 = 14.3) commercial Y3Al5O12:Ce3+-base...Continue Reading

References

Oct 23, 2008·Topics in Magnetic Resonance Imaging : TMRI·Ellen Warner
Oct 18, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Dongling GengJun Lin
Dec 19, 2013·Chemical Society Reviews·Mengmeng ShangJun Lin
Dec 20, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Mengmeng JiaoHongpeng You

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Citations

Sep 30, 2020·Physical Chemistry Chemical Physics : PCCP·Fengkai MaHongbin Liang
Jun 20, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Huiling ZhangJun Lin
Jul 14, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Rajat BajajG Vijaya Prakash
Apr 18, 2019·Light, Science & Applications·Ming ZhaoZhiguo Xia
May 27, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Wei LüHongpeng You
Jan 12, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Liang ZhangHongpeng You
Jul 15, 2021·Advanced Science·Hailong YuanRomain Gautier
Jan 25, 2017·ACS Applied Materials & Interfaces·Ziwei ZhouChongfeng Guo
Dec 1, 2017·ACS Applied Materials & Interfaces·Tae Ho LeeTae Geun Kim

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Methods Mentioned

BETA
X-ray
electron paramagnetic resonance
fluorescence microscopy

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