Cold and warm white light generation using Zn(PO₃)₂ glasses activated by Ce³⁺, Dy³⁺ and Mn²⁺

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• 作者：U. Caldiñ ; o^a ; ^{cald@xanum.uam.mx} ; E. &Aacute ; lvarez^b ; A. Speghini^c ; M. Bettinelli^c
• 关键词：Zinc metaphosphate glass ; Photoluminescence ; Non-radiative energy transfer ; White light ; Ce3+/Dy3+/Mn2+ ; Zn(PO3)2
• 刊名：Journal of Luminescence
• 出版年：2012
• 期刊代码：54_00222313
• 类别：ch
• 出版时间：August, 2012
• 卷：132
• 期：8
• 页码：2077-2081
• 文件大小：1074 K

摘要

The photoluminescence of zinc metaphosphate glasses activated by Dy³⁺, Ce³⁺/Dy³⁺ and Ce³⁺/Dy³⁺/Mn²⁺ ions was investigated. Non-radiative energy transfers from Ce³⁺ to Dy³⁺ and Ce³⁺ to Mn²⁺ are observed upon 280 nm excitation. The non-radiative nature of these transfers is inferred from the increase in the decay rate of the Ce³⁺ emission when the glass is co-doped with Dy³⁺ or Dy³⁺/Mn²⁺. It is demonstrated that zinc metaphosphate glasses can generate cold or warm white light emission when they are doped with Ce³⁺/Dy³⁺ or Ce³⁺/Dy³⁺/Mn²⁺ and pumped at 280 nm (peak emission wavelength of AlGaN-based LEDs). The CIE1931 chromaticity coordinates and color temperature were (0.34, 0.35) and 5250 K for the cold light, and (0.47, 0.43) and 2700 K for the warm light.