Spectroscopy and Spectral Analysis, Volume. 35, Issue 3, 695(2015)
Contrastive Research of the Y3Al5O12:Ce3+ Yellow Phosphors Prepared by Different Methods
Ce3+ doped Y3Al5O12∶Ce3+ yellow phosphors are prepared by the 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 are investigated 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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LI Zhao, ZHAO Xi-cheng, CHEN Li-jun, JIANG Yuan-ru, LUO Lei. Contrastive Research of the Y3Al5O12:Ce3+ Yellow Phosphors Prepared by Different Methods[J]. Spectroscopy and Spectral Analysis, 2015, 35(3): 695
Received: Sep. 22, 2014
Accepted: --
Published Online: May. 21, 2015
The Author Email: Zhao LI (pylizhao@163.com)