The effect of Eu3+-activated InVO4 phosphors prepared by sol-gel method

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題名:	The effect of Eu3+-activated InVO4 phosphors prepared by sol-gel method
作者:	Chang, Yee-Shin Shi, Zhao-Rong Tsai, Yeou-Yih Wu, Sean Chen, Hao-Long 吳信賢 (東方設計學院電子與資訊系)
貢獻者:	東方設計學院電子與資訊系
關鍵詞:	Indium orthovanadate Europium photoluminescence phosphor sol-gel method
日期:	2011-01
上傳時間:	2015-07-14 13:55:40 (UTC+8)
摘要:	Indium orthovanadate (InVO4) doped with Eu3+ ions had been synthesized by sol–gel method. The precursor of InVO4:Eu3+ powders were heated at 950 °C for 6 h in air, and the crystal structure, surface morphologies and photoluminescence properties were also investigated. XRD patterns indicated that the crystallinity of InVO4:Eu3+ powders decreases with increasing Eu3+ ion concentrations. From the SEM micrographs, the shapes of the InVO4 particles are uniform and like pebbles. With increasing Eu3+ ion concentrations, the shapes of the InVO4:Eu3+ particles become smaller and irregular. In the PL studies, the sharp excitation peaks between 300 and 600 nm correspond to the Eu3+ intra-4f transitions. Excitation at 326 nm in terms of Eu3+ concentrations in (In1−xEux)VO4 powders shows that the (In1−xEux)VO4 phosphors display bright red luminescence at about 615 nm belonging to the 5D0 → 7F2 electric dipole transition, and the time-resolved 5D0 → 7F2 transition presents a single exponential decay behavior. The concentration quenching is active when the Eu3+ concentration is larger than 30 mol%, and the critical distance is about 8.024 Å.
關聯:	Optical materials, Vol.33 no.3, pp.375-380
顯示於類別:	[電子與資訊系(遊戲動畫系、動畫科)] 期刊論文

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