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蓝光激发YAG荧光粉暖色调增强研究

发表时间:2013-08-15  浏览量:1220  下载量:1150
全部作者: 王长来,余海,许刚,杨阳,杨波,李广
作者单位: 安徽大学物理与材料科学学院;安徽大学安徽省信息材料与器件重点实验室
摘 要: 采用共沉淀法分别制得不同Ce3+掺杂浓度的黄色钇铝石榴石(yttrium aluminum garnet, YAG)纳米荧光粉和不同Eu3+掺杂浓度的红色Gd2(WO4)3纳米荧光粉。通过X射线衍射(X-ray diffraction, XRD)、扫描电子显微镜(scanning electron microscopy, SEM)和荧光分光光度计(photoluminescence, PL)对样品的结构、形貌和性能进行表征,得到Ce3+和Eu3+最佳掺杂浓度分别为4%和40%的样品。将Ce3+∶YAG和Eu3+∶Gd2(WO4)3分别按不同质量比(2∶1,1∶1,1∶3,1∶5)混合,然后对不同质量比荧光粉的放光强度进行比较,得到在同一波长为465 nm蓝光激发光源作用下发出白光的最佳混合比荧光粉。该混合荧光粉弥补了传统单一Ce3+∶YAG荧光粉发光色调偏冷的缺点,增加了红光成分,并且发光效率高、品质优良,在新型发光二极管(light emitting diode,LED)发光材料方面具有很大的应用价值。
关 键 词: 光学;白光发光二极管;Ce3+∶YAG;Eu3+∶Gd2(WO4)3;暖色调
Title: Research of blue light excitation phosphor of YAG on enhancing the warm tone
Author: WANG Changlai, YU Hai, XU Gang, YANG Yang, YANG Bo, LI Guang
Organization: School of Physics & Material Science, Anhui University; Anhui Key Laboratory of Information Materials and Devices, Anhui University
Abstract: Ce3+∶yttrium aluminum garnet (YAG) and Eu3+∶Gd2(WO4)3 nanophosphors were prepared by co-precipitation method, respectively. X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence (PL) were used to characterize the structure, morphology and properties of the nanocrystal samples. After gaining the best ratio of doping concentration (Ce3+ 4%, Eu3+ 40%), the Ce3+∶YAG and Eu3+∶Gd2(WO4)3 were mixed in different ratio (2∶1, 1∶1, 1∶3, 1∶5) in order to find the most suitable ratio. The fine mixed nanophosphors gave a white light while excited by 465 nm blue light. The mixed nanophosphors will compensate for the cold tone of Ce3+∶YAG given by the traditional phosphors by adding the red light thus might have a potential application for white light emitting diode (LED).
Key words: optics; white light emitting diode; Ce3+∶YAG; Eu3+∶Gd2(WO4)3; warm color
发表期数: 2013年8月第15期
引用格式: 王长来,余海,许刚,等. 蓝光激发YAG荧光粉暖色调增强研究[J]. 中国科技论文在线精品论文,2013,6(15):1393-1398.
 
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