A novel green-yellow emitting phosphor Ca1.5Y1.5Al3.5Si1.5O12:Ce3+ and its luminescence properties
来源期刊：JOURNAL OF RARE EARTHS2012年第7期
论文作者：吕春燕 金怀东 梁晓娟 向卫东 钟家松 董永军
文章页码：647 - 650
摘 要：We described the synthesis and luminescence of Ca1.5Y1.5Al3.5Si1.5O12:Ce3+ phosphor for light emitting diode （LED）. The crystal-linity, morphology, structure, and luminescence spectra were examined by X-ray diffraction, field emission-scanning electron microscopy and photoluminescence spectroscopy. The results showed that Ca1.5Y1.5Al3.5Si1.5O12:Ce3+ phase was a dominating phase with little impurity phase peaks of Y2O3 when the sintered temperature reached to 1400 oC. Field emission scanning electron microscopy （FE-SEM） images showed the particle size of the phosphor was about 3 μm. Meanwhile, the excitation and emission spectra indicated that the as-prepared phosphors could be effectively excited by blue （460 nm） light and the excitation spectrum showed a broad band extending from 400-500 nm, while emission spectrum showed a broad yellow band peaking at 534 nm. The decay curve at the emission peak consisted of fast and slow components. The Ca1.5Y1.5Al3.5Si1.5O12:Ce3+ should be a promising yellow phosphor for near blue-based white-light-emitting diodes （LEDs）.
吕春燕1，金怀东2，梁晓娟2，向卫东2,3，钟家松3，董永军4
1. Department of Chemistry, Huzhou Teachers College2. College of Chemistry and Materials Engineering, Wenzhou University3. College of Materials Science and Engineering, Tongji University4. Shanghai Institute of Optics and Fine Mechanics, Chi-nese academy sciences
摘 要：We described the synthesis and luminescence of Ca1.5Y1.5Al3.5Si1.5O12:Ce3+ phosphor for light emitting diode （LED）. The crystal-linity, morphology, structure, and luminescence spectra were examined by X-ray diffraction, field emission-scanning electron microscopy and photoluminescence spectroscopy. The results showed that Ca1.5Y1.5Al3.5Si1.5O12:Ce3+ phase was a dominating phase with little impurity phase peaks of Y2O3 when the sintered temperature reached to 1400 oC. Field emission scanning electron microscopy （FE-SEM） images showed the particle size of the phosphor was about 3 μm. Meanwhile, the excitation and emission spectra indicated that the as-prepared phosphors could be effectively excited by blue （460 nm） light and the excitation spectrum showed a broad band extending from 400-500 nm, while emission spectrum showed a broad yellow band peaking at 534 nm. The decay curve at the emission peak consisted of fast and slow components. The Ca1.5Y1.5Al3.5Si1.5O12:Ce3+ should be a promising yellow phosphor for near blue-based white-light-emitting diodes （LEDs）.
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