UV/VUV switch-driven color-reversal effect for Tb-activated phosphors

Light, Science & Applications
Chun Che LinRu-Shi Liu

Abstract

The remarkable narrow-band emission of trivalent lanthanide-doped phosphors excited by the vacuum ultraviolet (VUV) radiation lines of Xe atoms/Xe2 molecules at 147/172 nm are extensively investigated in the development of plasma display panels and Hg-free fluorescent lamps, which are frequently used in our daily lives. Numerous solid materials, particularly Tb3+-doped oxides, such as silicates, phosphates and borates, are efficient green/blue sources with color-tunable properties. The excitation wavelength and rare earth concentration are usually varied to optimize efficiency and the luminescent properties. However, some underlying mechanisms for the shift in the emission colors remain unclear. The present study shows that a UV/VUV switch systematically controls the change in the phosphor (Ba3Si6O12N2:Tb) photoluminescence from green to blue, resulting in a green emission when the system is excited with UV radiation. However, a blue color is observed when the radiation wavelength shifts to the VUV region. Thus, a configurational coordinate model is proposed for the color-reversal effect. In this model, the dominant radiative decay results in a green emission under low-energy UV excitation from the 5D4 state of the f-f inner-sh...Continue Reading

References

Feb 5, 2004·Journal of the American Chemical Society·Colin A Fyfe, Darren H Brouwer
May 28, 2005·Science·E Fred Schubert, Jong Kyu Kim
Jul 3, 2007·Nature Materials·Tadao HashimotoShuji Nakamura
Apr 8, 2009·Angewandte Chemie·Henning A Höppe
Feb 22, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Wanyuan LiYuejin Zhu

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Citations

Apr 22, 2020·Physical Chemistry Chemical Physics : PCCP·Jinxing ZhaoXu Li

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Methods Mentioned

BETA
chips
chip
X-ray
nuclear magnetic resonance
transmission
electron diffraction

Software Mentioned

General Structure Analysis System

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