Sol–gel synthesis and thermal stability of luminescence of Lu3Al5O12:Ce3+ nano-garnet
Sol–gel synthesis and thermal stability of luminescence of Lu3Al5O12:Ce3+ nano-garnet
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DOI：
10.1016/j.jallcom.2010.09.113
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发表时间：
2011-01
影响因子：
6.2
通讯作者：
R. Praveena;Liang Shi;K. Jang;V. Venkatramu;C. K. Jayasankar;H. Seo
中科院分区：
文献类型：
--
作者：
R. Praveena;Liang Shi;K. Jang;V. Venkatramu;C. K. Jayasankar;H. Seo
图形摘要：Display省略研究要点：用Pechini Sol-Gel法制备了LuAG：Ce{sup3+}纳米石榴石粉末，其平均粒径为22 nm，团聚在一起。研究了LuAG：Ce{SuP3+}在460 nm激发下至150℃的发光热稳定性。C的性能优于纳米石榴石：Ce。>；LuAG：Ce{sup3+}纳米石榴石具有稳定的温度色度配位。摘要：采用Pechini溶胶-凝胶法制备了掺Ce{SuP3+}的LuAG纳米石榴石粉末，并用X射线衍射仪、透射电子显微镜、激发光谱、光致发光光谱和衰变测试对其进行了表征。在25-150℃温度范围内，对LuAG：Ce{SuP3+}发光的热稳定性进行了评价。C，在460 nm激发下。结果表明，LuAG：Ce{SuP3+}纳米石榴石的热稳定性优于市售的纳米石榴石。CIE色度坐标随着温度的变化而保持不变。因此，当与蓝色LED耦合时，它可能是产生白光的合适候选者。
Graphical abstract: Display Omitted Research highlights: > The LuAG:Ce{sup 3+} nano-garnet powder has been prepared by Pechini sol-gel method which are found to be agglomerated with an average particle size of 22 nm. > The thermal stability of luminescence under 460 nm excitation of LuAG:Ce{sup 3+} up to 150 deg. C found to be better than YAG:Ce{sup 3+} nano-garnet. > The LuAG:Ce{sup 3+} nano-garnet exhibits stable color co-ordinates with respect to temperature. - Abstract: Ce{sup 3+}-doped lutetium aluminum (LuAG) nano-garnet powder has been prepared by Pechini sol-gel method and characterized by X-ray diffraction, transmission electron microscope, excitation and photoluminescence spectra and decay measurements. The thermal stability of luminescence of the LuAG:Ce{sup 3+} has been evaluated for the temperature range 25-150 deg. C under the 460 nm excitation. The results indicate that the thermal stability of LuAG:Ce{sup 3+} is better than that of commercially available YAG:Ce{sup 3+} nano-garnet. The CIE chromaticity co-ordinates have been found to remain constant with change in temperature. Hence, it could be an apt candidate for generating white light when coupled to a blue LED.