Glycothermal synthesis and photoluminescence of YAG: Ce3+ nanophosphors
Glycothermal synthesis and photoluminescence of YAG: Ce3+ nanophosphors
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DOI：
10.1016/j.jallcom.2005.01.066
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发表时间：
2006-02-09
影响因子：
6.2
通讯作者：
Kuma, H
中科院分区：
文献类型：
--
作者：
Kasuya, R;Isobe, T;Kuma, H
采用糖热法合成了Y3Al5O12:Ce3+ (YAG:Ce3+)纳米荧光粉，其中异丙醇铝与钇和铈(III)的乙酸盐在高压釜中于1,4-丁二醇中诱导反应。根据X射线衍射图，YAG晶体结构是在300℃下糖热处理1小时以上后形成的。通过TEM观察和动态光散射证实了直径接近10 nm的初级粒子的聚集。在糖热处理过程中，Ce3+ 的 5d -> 4f 跃迁引起的光致发光 (PL) 强度随着 300°C 老化时间的增加而增加。电感耦合等离子体原子发射光谱显示，无论在300℃下老化时间如何，Ce/(Y+Ce)的原子比都保持不变。因此，这表明延长老化促进了Ce3+均匀地掺入颗粒内部。根据热分析和红外吸收光谱的表征，1,4-丁二醇和乙酸盐在YAG:Ce3+纳米荧光粉表面的配位可能对PL增强起到重要作用。 (c) 2005 Elsevier B.V. 保留所有权利。
Y3Al5O12:Ce3+ (YAG:Ce3+) nanophosphor powder was synthesized by glycothermal method, where a reaction between aluminum isopropoxide and acetates of yttrium and cerium(III) was induced in 1,4-butylene glycol in autoclave. According to X-ray diffraction profiles, YAG crystal structure was formed after glycothermal treatment at 300 degrees C for more than I h. The aggregation of the primary particles of similar to 10 nm diameter was confirmed by TEM observation and dynamic light scattering. The intensity of photoluminescence (PL) due to 5d -> 4f transition of Ce3+ increased with increasing the aging time at 300 degrees C during glycothermal treatment. The inductively coupled plasma atomic emission spectroscopy revealed that the atomic ratio of Ce/(Y + Ce) remained unchanged irrespective of the aging time at 300 degrees C. Therefore, this suggests that prolonged aging promotes the homogeneous incorporation of Ce3+ into the interior of particle. Based on the characterization by thermal analysis and infrared absorption spectroscopy, the coordination of 1,4-butylene glycol and acetate on the surface of YAG:Ce3+ nanophosphors possibly plays a significant role in the PL enhancement. (c) 2005 Elsevier B.V. All rights reserved.