Synthesis and Luminescence Properties of Red Phosphor CaO: Eu3+
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2009年第1期
论文作者：康明
文章页码：20 - 24
摘 要：Ca（NO3）2·4H2O, Eu（NO3）3 and H2C2O4·2H2O were adopted to synthesize CaO: Eu3+ with the chemical co-precipitation method, and the effects of the calcination temperature and Eu3+ doping concentration on the phosphor structure and its luminescent properties were investigated by TG-SDTA, XRD, and PL-PLE. The results confirm that the Eu3+ ions as luminescent centers substi-tutes Ca2+ sites without changing the crystal structure of cubic CaO. The optimum calcination tem-perature and the optimum concentration of Eu3+ are 1 100 ℃ and 1 mol%, respectively, under which the best crystallinity and highest PL intensity appeared. The maximum emission wavelength is 592 nm （5D0→7F1） which is excited by xenon lamp with the wavelength of 200-280 nm, indicating that the Eu3+ ion mainly locates in the symmetric position （Oh） in the crystal lattice of CaO.
康明
School of Material Science and Engineering,Southwest University of Science and TechnologyCollege of Materials Science and Engineering,Sichuan University
摘 要：Ca（NO3）2·4H2O, Eu（NO3）3 and H2C2O4·2H2O were adopted to synthesize CaO: Eu3+ with the chemical co-precipitation method, and the effects of the calcination temperature and Eu3+ doping concentration on the phosphor structure and its luminescent properties were investigated by TG-SDTA, XRD, and PL-PLE. The results confirm that the Eu3+ ions as luminescent centers substi-tutes Ca2+ sites without changing the crystal structure of cubic CaO. The optimum calcination tem-perature and the optimum concentration of Eu3+ are 1 100 ℃ and 1 mol%, respectively, under which the best crystallinity and highest PL intensity appeared. The maximum emission wavelength is 592 nm （5D0→7F1） which is excited by xenon lamp with the wavelength of 200-280 nm, indicating that the Eu3+ ion mainly locates in the symmetric position （Oh） in the crystal lattice of CaO.
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