| 光谱学与光谱分析 |
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| Contrastive Research of the Y3Al5O12: Ce3+ Yellow Phosphors Prepared by Different Methods |
| LI Zhao1, ZHAO Xi-cheng2*, CHEN Li-jun3, JIANGYuan-ru3, LUO Lei2 |
1. College of Materials and Mineral Resources, Xi’an University of Architecture and Technology, Xi’an 710055, China
2. College of Metallurgical Engineering, Xi’an University of Architectureand Technology, Xi’an 710055, China
3. School of Science, Xi’an University of Architecture and Technology, Xi’an 710055, China |
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Abstract Ce3+ doped Y3Al5O12∶Ce3+yellow phosphors are prepared bythe high-temperature solid-state method, sol-gel method and hydrothermal-pyrolysis methods. The influences of the preparation methods on the phase, morphology and photoluminescence properties of the YAG∶Ce3+ yellow phosphors areinvestigated by XRD, FESEM and PL, respectively. The results indicate that the three methods all realize the substitution of Ce3+ ions for Y3+ ions, and that the cubic crystalline structure of the Ce3+-doped YAG phosphors is unchanged. The samples prepared by the high-temperature solid-state method present an irregular sphere-like morphology, with a large sample size; the sol-gel method produces nanoparticles with a notable particle agglomeration; and the samples prepared by the hydrothermal-pyrolysis method present a well-distributed sphere-like structure with a diameter of 10 μm. According to the fluorescence spectrum, the three samples are excited by blue light with a wavelength of 460 nm, and a big broadband emission at 550 nm is observed. However, due to the differences in the morphology and size, these samples present very different luminous intensities and quantum efficiencies.
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Received: 2014-09-22
Accepted: 2014-12-28
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Corresponding Authors:
ZHAO Xi-cheng
E-mail: pylizhao@163.com
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