Influence on Red Long-Lasting Phosphorescence due to Different Doping Concentrations of ZnGa₂O₄:Cr³⁺

Abstract:

High temperature solid state reaction has been used to prepare the new red long-lasting phosphorescence (LLP) material ZnGa₂O₄:Cr³⁺ with different doping concentration. The afterglow properties of the samples have been investigated. Our study has shown that ZnGa₂O₄ samples without Cr³⁺ doping have blue-green afterglow. While the blue-green afterglow has disappeared and the red long-lasting phosphorescence according to the Cr³⁺ luminescence center covering 650 nm-750 nm has been observed when Cr³⁺ has been doped. In terms of brightness and decay time of the afterglow, the red afterglow and the blue-green afterglow have been entirely different. In this article the influence on LLP due to different doping concentrations of ZnGa₂O₄:Cr³⁺ has been discussed and the possible LLP mechanism has been proposed.

• Periodical: Applied Mechanics and Materials (Volumes 423-426)
• Pages: 411-414
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.423-426.411
• Online since: September 2013
• Authors: Rui Xia Zhong, Zi Ran Liu, Qing Qiu, Jian Quan Qi, Xiao Yan Zhang
• Keywords: Cr³⁺, Red Afterglow, Red Long-Lasting Phosphorescence, ZnGa₂O₄

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