Green light emission by Ce³⁺ and Tb³⁺ co-doped Sr₃MgSi₂O₈ phosphors for potential application in ultraviolet whitelight-emitting diodes

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• 作者：Hong Yu^a ; Wenwen Zi^a ; Shi Lan^a ; Shucai Gan^a ; ^{gansc@jlu.edu.cn} ; Haifeng Zou^a ; Xuechun Xu^b ; Guangyan Hong^c
• 关键词：Sr3MgSi2O8 ; Ce3+ ; Tb3+ ; Photoluminescence
• 刊名：Optics and Laser Technology
• 出版年：2012
• 期刊代码：48_00303992
• 类别：ph
• 出版时间：October, 2012
• 卷：44
• 期：7
• 页码：2306-2311
• 文件大小：873 K

摘要

Sr₃MgSi₂O₈:Ce³⁺, Tb³⁺ phosphor samples were prepared using a solid-state reaction technique, and the photoluminescence properties and energy transfer were investigated. Effective energy transfer occurred in Ce³⁺/Tb³⁺ co-doped Sr₃MgSi₂O₈ phosphors. Co-doping of Ce³⁺ was found to enhance the emission intensity of Tb³⁺ to a certain extent by transferring energy to Tb³⁺. The Ce³⁺/Tb³⁺ energy transfer was thoroughly investigated through its emission/excitation spectra and photoluminescence decay behavior. The color emitted by Sr₃MgSi₂O₈:Ce³⁺, Tb³⁺ phosphors varied from blue to green and can be controlled by altering the concentration ratio of Ce³⁺ to Tb³⁺. These results indicate that Sr₃MgSi₂O₈:Ce³⁺, Tb³⁺ may be useful as a green-emitting phosphor for ultraviolet whitelight-emitting diodes.