Efficient Sensitization of Eu3+ Emission by Tb3+ in Ba3La(PO4)3 under VUV-UV Excitation: Energy Transfer and Tunable Emission

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• 作者：Caihua Zhang ; Hongbin Liang ; Su Zhang ; Chunmeng Liu ; Dejian Hou ; Lei Zhou ; Guobin Zhang ; Junyan Shi
• 刊名：The Journal of Physical Chemistry C
• 出版年：2012
• 出版时间：August 2, 2012
• 年：2012
• 卷：116
• 期：30
• 页码：15932-15937
• 全文大小：531K
• 年卷期：v.116,no.30(August 2, 2012)
• ISSN：1932-7455

文摘

The work presents the VUV-UV鈥搗is photoluminescence of Ba₃La(PO₄)₃:Ln³⁺ (Ln = Tb, Eu) prepared by a high-temperature solid-state reaction route. The excitation and emission spectra, the fluorescence decays, and the time-resolved emission spectra were measured and discussed in detail. The results reveal that Tb³⁺ can efficiently transfer excitation energy to Eu³⁺ via its 5d and 4f states and therefore sensitizes Eu³⁺ emission under VUV-UV excitation, resulting in tunable emission in a large color gamut.