Enhanced Green Emission of Eu2+ by Energy Transfer from the 5D3 Level of Tb3+ in NaCaPO4

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• 作者：Yanhui Wang ; Mikhail G. Brik ; Pieter Dorenbos ; Yan Huang ; Ye Tao ; Hongbin Liang
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：April 3, 2014
• 年：2014
• 卷：118
• 期：13
• 页码：7002-7009
• 全文大小：534K
• 年卷期：v.118,no.13(April 3, 2014)
• ISSN：1932-7455

文摘

Eu²⁺/Tb³⁺ single-doped and codoped NaCaPO₄ phosphors were prepared by a high-temperature solid-state reaction method. Their VUV鈥揢V excitation spectra, emission spectra, fluorescence decay spectra, X-ray excited luminescence (XEL), and cathodoluminescence (CL) spectra were investigated and discussed. The main parameters of the electron鈥搗ibrational coupling between the Eu²⁺ 5d states and host lattice vibrations (such as Huang鈥揜hys factor, effective phonon energy, and position of the zero-phonon line of the 4f⁶5d鈥?f⁷ emission of Eu²⁺) were estimated from the experimental spectra. For codoped samples NaCaPO₄:Eu²⁺, Tb³⁺, enhanced green emission of Eu²⁺ by energy transfer (ET) from the ⁵D₃ level of Tb³⁺ was found.