Photoluminescence of Sinthetic Scapolite Na4Ca4Al6Si9O24 Phosphors Activated with Ce3+ and Tb3+ and Energy Transfer from Ce3+ to Tb3+
MA Yuan-yuan, HE Jiu-yang, Aziguli·Reheman, Bahadeer·Rouzi, Aierken·Sidike*
College of Physics and Electronic Engineering of Xinjiang Normal University，Key Laboratory of Mineral Luminescent Material and Microstructure of Xinjiang，Urumqi 830054，China
Abstract：Natural scapolite including the S-2 impurity is a typical silicate luminescent mineral. According to the formation conditions and chemical composition of natural scapolite, we synthesized Na4Ca4Al6Si9O24(scapolite) by the high temperature solid-phase reaction, and prepared the synthetic scapolite phosphors activated with Ce3+ and Tb3+. The photoluminescence (PL) properties of the obtained phosphors were studied. The results indicated that the PL intensity of green (545 nm) emission corresponding to the 5D4 →7F5 transition within Tb3+in the Ce3+, Tb3+-codoped samples was much higher than that of the Tb3+-doped samples. The PL properties of the samples activated with various Ce3+ concentrations were measured, and their fluorescence lifetime and energy transfer mechanism were analyzed. We proved that there was energy transfer from Ce3+ to Tb3+, and the energy transfer efficiency was at its maximum when the Ce3+ to Tb3+ mass ratio was 0.02∶0.03. Upon measurement by chromaticity coordinates, we found that the luminescence of the samples could be adjusted in the green area with varying Ce3+ concentrations. We thus deem that scapolite phosphors Na4Ca4Al6Si9O24∶Ce3+, Tb3+ are promising to become the new white LED phosphors.
马媛媛，何久洋，阿孜古丽·热合曼，巴哈德尔·肉孜，艾尔肯·斯地克* . Na4Ca4Al6Si9O24∶Ce3+, Tb3+荧光粉合成及其能量传递研究 [J]. 光谱学与光谱分析, 2015, 35(11): 3241-3246.
MA Yuan-yuan, HE Jiu-yang, Aziguli·Reheman, Bahadeer·Rouzi, Aierken·Sidike* . Photoluminescence of Sinthetic Scapolite Na4Ca4Al6Si9O24 Phosphors Activated with Ce3+ and Tb3+ and Energy Transfer from Ce3+ to Tb3+. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2015, 35(11): 3241-3246.
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