Vacuum Ultraviolet−Visible Spectroscopic Properties of Tb3+ in Li(Y, Gd)(PO3)4: Tunable Emission, Quantum Cutting, and Energy Transfer

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• 作者：Bing Han ; Hongbin Liang ; Yan Huang ; Ye Tao ; Qiang Su
• 刊名：Journal of Physical Chemistry C
• 出版年：2010
• 出版时间：April 15, 2010
• 年：2010
• 卷：114
• 期：14
• 页码：6770-6777
• 全文大小：432K
• 年卷期：v.114,no.14(April 15, 2010)
• ISSN：1932-7455

文摘

This work presents the vacuum ultraviolet−visible spectroscopic properties of Tb³⁺ in Li(Y, Gd)(PO₃)₄:Tb³⁺ phosphors prepared by a high-temperature solid-state reaction. Under vacuum ultraviolet light excitation, tunable emission from the greenish-blue to yellowish-green region was obtained by changing the doping concentration of Tb³⁺. The visible quantum cutting via cross-relaxation between Tb³⁺ ions was observed and confirmed in the high Tb³⁺ concentration sample. In addition, the energy-transfer process from Gd³⁺ to Tb³⁺ as well as ⁵D₃−⁵D₄ cross-relaxation was also investigated and discussed in term of luminescence spectra and decay curves.