| 光谱学与光谱分析 |
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| Study on Hydrothermal Preparation and Luminescence Properties of Luminescent Material BaSrMg(PO4)2∶Eu3+ |
| HU Qing-song, ZHU Cheng-jing, XIA Yue-yi, WANG Li-li, LIU Wen-han, PAN Zai-fa* |
| Chemical Engineering Science, Zhejiang University of Technology, Hangzhou 310014, China |
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Abstract Eu3+ doped BaSrMg(PO4)2 were prepared by a hydrothermal method. The crystal structure and morphology of BaSrMg(PO4)2∶Eu3+ phosphor were characterized by X-ray powder diffraction(XRD) and field emission scanning electron microscopy(FESEM). The effects of different pH values (5, 6, 7 and 8) and different reaction temperatures (120, 140, 160, 180 and 200 ℃) on the crystal structure and morphology of BaSrMg(PO4)2∶Eu3+ phosphor were studied in this paper. The results of XRD indicate that diffraction peaks are sharp and strong only when pH value is 6, meanwhile the FESEM shows the morphology is regular-shaped. The XRD patterns show amorphous halos superimposed with several weak sharp peaks for the samples preparing under the pH values of 5, 7 and 8. It indicates that these three samples are solid solution or mixed phases, which are in accord with the results of FESEM. From the fluorescence spectra, the peaks in the excitation spectra were assigned to the transition from 7F0 to 5D4, 5L8, 5L6 and 5D2, while the peaks of emission spectra corresponding to the transition of 5D1→7F1 and 5D0→7FJ (J= 0, 1, 2, 3 and 4). The strongest emission peak of the optimized phosphor located at 613 nm (5D0→7F2), excited by the main excitation peak with wavelength of 394 nm. The splitting of the emission peaks changes depends on pH values and temperatures, which indicating that luminescence properties is closely related to the crystal structure and morphology of particles.
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Received: 2014-06-14
Accepted: 2014-08-28
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Corresponding Authors:
PAN Zai-fa
E-mail: panzaifa@zjut.edu.cn
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