白光LED用红色荧光粉Ca0.7Sr0.18-0.15xMoO4:Eu^3+0.08:Gd^3+x水热合成与发光性能研究  

Hydrothermal synthesis and characterization of CaSr MoO:Eu:Gd of red phosphor powder for white LED

作　　者：姜秀榕[1,2] 张钦应 刘铠铭 江程 郑文进 JIANG Xiurong;ZHANG Qinying;LIU Kaiming;JIANG Cheng;ZHENG Wenjin(College of Chemistry and Materials Science,Longyan University,Longyan 364000,China;Fujian Provincial Key Laboratory of Clean Energy Materials,Longyan 364000,China)

机构地区：[1]龙岩学院化学与材料学院,福建龙岩364000 [2]福建省清洁能源材料重点实验室,福建龙岩364000

出　　处：《功能材料》2020年第9期9201-9207,共7页Journal of Functional Materials

基　　金：国家自然科学基金青年基金自助项目(201607069);福建省重点学科建设资助项目(201811312008);福建省大学生创新创业训练计划资助项目(2019312043)。

摘　　要：采用水热合成法以Gd^3+掺杂,Eu^3+为激活剂和谷氨酸(Glu)为辅助配位剂制备了荧光粉前驱体,并在800℃高温下焙烧得到了同一体系多种红色荧光粉:CaSrMoO4:Eu^3+:Gd^3+。采用X射线衍射谱(XRD)、扫描电子显微镜(SEM)、X射线能谱(EDS)和X射线光电子能谱(XPS)等多手段,并系统的分析了红色荧光粉的结构、形貌和组成,并且通过荧光光谱(PL)测试了样品的发光性能和荧光寿命,在此结果上进行了色坐标(CIE)分析。结果表明,制备的红色荧光粉的尺寸随着Gd^3+的引入实现与Eu^3+之间的能量交换,掺杂Gd^3+离子对晶质晶体结构影响不大,且晶体为四方正八面体晶系结构,粒度分布均匀且粒径较小,约在1.0~1.3μm之间。在395 nm的紫外光有效激发,与紫外光LED和芯片相匹配,其荧光寿命为460.67 ms。色坐标测试结果接近标准红色色坐标,并且符合我国彩电荧光粉的标准要求,接近美国NTSC标准值,有望商品化。By hydrothermal synthesis method for Gd^3+doping,phosphors precursor was prepared with Eu^3+as activator and glutamate(Glu)as auxiliary complexing agent.And a series of CaSrMoO4:Eu^3+:Gd^3+red phosphors were obtained under 800℃calcination.The structure and morphology of the red phosphor were studied by X-ray diffraction(XRD)and scanning electron microscopy(SEM),fluorescence spectrum(PL)was used to measure the luminous performance and life of phosphor powder,and color coordinate(CIE)analysis was performed on the results.The results showed that with the introduction of Gd^3+,the energy exchanged between Eu^3+and the size of the prepared red phosphor was realized.Doping Gd^3+ions had little effect on the crystal structure,and the crystal was a tetragonal structure with uniform particle size distribution and small particle size,ranging from 1.0 to 1.3μm.Ultraviolet light at 395 nm and visible light at 465 nm could be effectively excited,which was matched with ultraviolet LED and blue LED chips,and its fluorescence life was 460.67 ms.The color coordinate test result was more close to the standard red color coordinate than the commercial one,which conformed to the standard requirements of the Color TV Flash Powder Issued in China and was close to the standard value of the National Television Standard Committee of the United States.It has the potential to become a commercial red flash powder.

关 键 词：红色荧光粉 Gd^3+掺杂 水热合成法 荧光性能 

分 类 号：O482.31[理学—固体物理]