Enhanced Luminescence of NaY0.6鈥?i>xCe0.1Gd0.3EuxF4 Nanorods by Energy Transfers between Ce3+, Gd3+, and Eu

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• 作者：Bing Chen ; Xvsheng Qiao ; Dengfeng Peng ; Xianping Fan
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：December 26, 2014
• 年：2014
• 卷：118
• 期：51
• 页码：30197-30201
• 全文大小：360K
• ISSN：1932-7455

文摘

In this study, hexagonal-phase NaY_0.6鈥?i>xCe_0.1Gd_0.3Eu_xF₄ nanorods were synthesized via a mild solvothermal method. By modifying the Eu³⁺ dopant concentration, the crystal phase, morphology, and luminescent properties were well controlled. A broad excitation band centered at around 260 nm corresponding to the ²F_5/2 鈫?4f-5d transition of Ce³⁺ was detected in the hosts containing Gd³⁺ ions by monitoring the Eu³⁺ emissions, indicating that an efficient Ce³⁺ 鈫?Eu³⁺ energy transfer occurred via the Gd³⁺ sublattice. Luminescence decay behaviors of the NaY_0.6鈥?i>xCe_0.1Gd_0.3Eu_xF₄ nanorods were studied, and the energy transfer mechanism was discussed. An obvious rising edge on the luminescence decay curve of Eu³⁺ ions in the NaY_0.6鈥?i>xCe_0.1Gd_0.3Eu_xF₄ nanorods was observed. The rising time is proposed to describe the energy migration time from Ce³⁺ to Eu³⁺ via the Gd³⁺ sublattice.