新型绿色荧光粉CeO_(2):Mn(Ⅱ)的发光性能研究  

Luminescence characteristics of advanced green phosphor CeO_(2):Mn(Ⅱ)

作　　者：刘凯 李孝斌 吴锐敏 徐慢[1] 戴武斌 LIU Kai;LI Xiaobin;WU Ruimin;XU Man;DAI Wubin(School of Materials Science and Engineering,Wuhan Institute of Technology,Wuhan 430205,China)

机构地区：[1]武汉工程大学材料科学与工程学院,湖北武汉430205

出　　处：《武汉工程大学学报》2024年第1期38-42,49,共6页Journal of Wuhan Institute of Technology

基　　金：湖北省自然科学基金青年项目(18S020);湖北省教育厅科学技术研究计划项目(18S069);武汉工程大学博士启动基金(16QD28);武汉工程大学第十三届研究生教育创新基金(CX2021166)。

摘　　要：以氧化铈和碳酸锰为主要原料、氧化铝作分散剂,采用高温固相法在碳还原气氛中首次合成一系列掺杂量为0.01~0.04的Mn掺杂CeO_(2)绿色荧光粉(CeO_(2):Mn^(2+)),并分析试样的晶体结构、粒径、形貌和发光性能。结果表明:制得的CeO_(2):Mn^(2+)荧光粉为立方萤石结构,分散剂氧化铝的加入能够避免主晶格CeO_(2)的烧结并促进发光中心的掺杂,氧化铝不会明显改变试样的晶体结构。试样的粒径集中在6~10μm范围内,颗粒的外形为椭球形和条形。荧光光谱显示,掺杂发光中心Mn^(2+)后,该荧光粉在272 nm紫外光激发下能够发出519 nm高强绿光,其中,CeO_(2):0.033Mn试样的发光性能最佳。该CeO_(2):Mn^(2+)绿色荧光粉在显示和照明领域具有良好的应用前景。A series of Mn-doped CeO_(2)green phosphors(CeO_(2):Mn^(2+))with doping molar fractions of 0.01-0.04 were firstly synthesized by using cerium oxide and manganese carbonate as main materials and alumina as a dispersant via solid-state reaction under carbon condition.The crystal structure,particle size,microstructure and luminescence properties of obtained CeO_(2):Mn^(2+)samples were analyzed.It indicated that the CeO_(2):Mn^(2+)samples are of pure cubic fluorite-type CeO_(2)phase.The addition of alumina dispersant can avoid CeO_(2)host sintering and promote luminescent center doping,while the alumina does not significantly change samples'crystal structure.The particle sizes are within range of 6-10μm,and the particle morphology is of ellipsoid and cuboid.Fluorescence spectroscopy results show that,with luminescent center doped with Mn^(2+),the samples can emit green light with high luminous intensity under 272 nm ultraviolet light exciting,and CeO_(2):0.033Mn has the best luminescence property among the samples.The CeO_(2):Mn^(2+)green phosphors are expected to have good application prospects in the field of display and lighting.

关 键 词：氧化铈 氧化铝 绿色荧光粉 锰掺杂 发光性能 

分 类 号：O482.31[理学—固体物理]