Photoluminescence characterization and energy transfer of color-tunable Li₆Y(BO₃)₃:Ce³⁺,Tb³⁺ phosphors

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• 作者：Anxiang Guan ; Liya Zhou ; ^{zhouliyatf@163.com" class="auth_mail" title="E-mail the corresponding author} ; Guofang Wang ; Fangfang Gao ; Qiuping Wang ; Xueting Chen ; Yinghao Li
• 关键词：Luminescence ; Optical materials ; Tunable emission
• 刊名：Physica B: Physics of Condensed Matter
• 出版年：2016
• 出版时间：1 August 2016
• 年：2016
• 卷：494
• 期：Complete
• 页码：75-81
• 全文大小：1321 K

文摘

Ce³⁺ and Tb³⁺ singly doped and co-doped Li₆Y(BO₃)₃ (LYB) phosphors were synthesized through a solid-state reaction. The phosphors were effectively excited by 350 nm, which matched the near-UV emitting InGaN chip. Luminescence spectra and decay lifetime curves of LYB:Ce³⁺,Tb³⁺ were measured to prove energy transfer from Ce³⁺ to Tb³⁺. Through energy transfer, the intensity of the typical emission peak of Tb³⁺ at 546 nm in LYB:0.05Ce³⁺,0.03Tb³⁺ was approximately 1.8 times stronger than that in LYB:0.03Tb³⁺. The mechanism of Ce³⁺→Tb³⁺ energy transfer was a dipole–dipole interaction, and the energy transfer efficiency gradually increased to 29.27% with increasing Tb³⁺ doping concentration. Furthermore, the emission colors of LYB:Ce³⁺,Tb³⁺ varied from blue to green by adjusting the Ce³⁺/Tb³⁺ ratio, indicating that the phosphors could be used as blue-to-green emitting phosphors for application in ultraviolet light-emitting diodes.