Synthesis and red luminescence of Pr-doped CaTiO3 nanophosphor from polymer precursor |
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Authors: | Yuexiao Pan Huifang Xu Weikun Ge Mingmei Wu |
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Institution: | a State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-Sen (Zhongshan) University, 135 Xingang Rd. W, Guangzhou 510275, People's Republic of Chinab Department of Earth and Planetary Science, University of New Mexico, 200 Yale Blvd., Albuquerque, NM 87131, USAc Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, People's Republic of China |
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Abstract: | Uniform and sphere-like nanoparticles of crystalline Pr3+-doped CaTiO3 have been prepared from complex polymer precursor at 600°C, in which, metal atoms are previously dispersed by citric acid in ethylene glycol solvent. The decomposition process of the precursor, crystallization, and particle sizes of CaTiO3 have been investigated by using thermal analysis, powder X-ray diffraction and transmission electron microscopy. Diffuse reflectance spectra, photoluminescence and decay curve indicate that a strong red emission located at the nearly NTCS “ideal red” site is deduced from the energy transfer from the band gap absorption to doping Pr3+ ions. The thermoluminescence curves exhibit that a potential long phosphorescent material based on Pr3+-doped CaTiO3 will be explored in future. |
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Keywords: | Nanophosphor CaTiO3 Sol-gel chemistry Red luminescence |
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