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| Synthesis of CaWO4：Eu3＋ phosphor powders via ethylene glycol route and its optical properties | |
| 引用本文： | K.Gayatri Sharma,N.Rajmuhon Singh. Synthesis of CaWO4：Eu3＋ phosphor powders via ethylene glycol route and its optical properties[J]. 中国稀土学报(英文版), 2012, 30(4): 310-314. DOI: 10.1016/S1002-0721(12)60043-X |
| 作者姓名： | K.Gayatri Sharma N.Rajmuhon Singh |
| 作者单位： | Department of Chemistry, Manipur University, Canchipur-795003, Imphal, Manipur, India |
| 基金项目： | Project supported by the Department of Science and Technology (DST), New Delhi, Govt. of India |
| 摘 要： | Eu3+ doped CaWO4 with tetragonal system were prepared at comparatively low temperature (125 ?C) in ethylene glycol medium. The phosphor was further investigated by X-ray diffractometer (XRD), photoluminescence spectrophotometer (PL), Fourier transform infra red (FT-IR) spectroscopy and transmission electron microscopy (TEM). XRD analysis indicated a decrease in the unit cell volume of CaWO4 with increasing Eu3+ ion concentration. It indicated the homogeneous substitution of Ca2+ ions in CaWO4 by the Eu3+ ions. TEM images showed that the particle size ranged from 20 to 200 nm and it could extend the application of the nanoparticles. The photoluminescence study showed that the intensity of electric dipole transition (5D0→7F2) at 614 nm dominated over the magnetic dipole transition (5D0→7F1) at 592 nm. The optimum concentration of Eu3+ for the highest luminescence was found to be 20 at.%. The as prepared samples were found to be dis-persible in water and methanol. |
| 关 键 词： | CaWO4:Eu3+ capping agent photoluminescence dispersible rare earths |
| 收稿时间： | 2011-07-22 |
Synthesis of CaWO4:Eu3+ phosphor powders via ethylene glycol route and its optical properties |
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| K. Gayatri Sharma, N. Rajmuhon Singh,.. Synthesis of CaWO4:Eu3+ phosphor powders via ethylene glycol route and its optical properties[J]. Journal of Rare Earths, 2012, 30(4): 310-314. DOI: 10.1016/S1002-0721(12)60043-X | |
| Authors: | K. Gayatri Sharma N. Rajmuhon Singh . |
| Affiliation: | Gayatri Sharma, N. Rajmuhon Singh (1. Department of Chemistry, Manipur University, Canchipur-795003, Imphal, Manipur, India) Received 22 July 2011; revised 12 August 2011 |
| Abstract: | Eu3+ doped CaWO4 with tetragonal system were prepared at comparatively low temperature (125 °C) in ethylene glycol medium. The phosphor was further investigated by X-ray diffractometer (XRD), photoluminescence spectrophotometer (PL), Fourier transform infra red (FT-IR) spectroscopy and transmission electron microscopy (TEM). XRD analysis indicated a decrease in the unit cell volume of CaWO4 with increasing Eu3+ ion concentration. It indicated the homogeneous substitution of Ca2+ ions in CaWO4 by the Eu3+ ions. TEM images showed that the particle size ranged from 20 to 200 nm and it could extend the application of the nanoparticles. The photoluminescence study showed that the intensity of electric dipole transition (5D0→7F2) at 614 nm dominated over the magnetic dipole transition (5D0→7F1) at 592 nm. The optimum concentration of Eu3+ for the highest luminescence was found to be 20 at.%. The as prepared samples were found to be dispersible in water and methanol. |
| Keywords: | CaWO4:Eu3+ capping agent photoluminescence dispersible rare earths |
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