发光学报2024，Vol.45Issue(3)：450-457,8.DOI:10.37188/CJL.20230307
Bi3+、Eu3+共掺杂La4GeO8荧光粉的制备及可调发光
Preparation and Color-tunable Luminescence of La4GeO8:Bi3+,Eu3+ Phosphors
摘要
Abstract
In order to develop efficient and stable single matrix white light emitting fluorescent materials,a series of La4GeO8∶Bi3+,Eu3+ phosphors were successfully synthesized by high-temperature solid-state method.The structural and luminescent properties of the experimental samples were studied by X-ray diffraction,room temperature spectra,and variable temperature spectra.It was found that Bi3+ ions occupy two different lattice positions(Bi3+(Ⅰ)and Bi3+(Ⅱ))in this structure,and exhibit two broadband emission peaks at 475 nm and 620 nm under UV excitation,re-spectively.The tunable emission from blue to red and orange red to red can be achieved due to the competitive ab-sorption process of Bi3+(Ⅰ)and Eu3+,energy transfer of Bi3+(Ⅰ)→Bi3+(Ⅱ)and Bi3+(Ⅱ)→Eu3+.Specially,excellent white light emission with CIE(0.335,0.319)was obtained in sample of La4GeO8∶0.07Bi3+,0.06Eu3+ under 313 nm excitation.In addition,the white light emission sample presents excellent luminescent thermal stability(the integrat-ed emission intensity at 380 K remains 59%of that at room temperature),indicating that the material has potential application in white light-emitting diodes.关键词
La4GeO8∶Bi3+,Eu3+/可调发光/发光热稳定性/白光二极管Key words
La4GeO8∶Bi3+,Eu3+/tunable emission/luminescence thermal stability/white light emitting diodes分类
数理科学引用本文复制引用
张文娜,黎仲寅,马纪涛,陈娅鹏,杨菲,郭海..Bi3+、Eu3+共掺杂La4GeO8荧光粉的制备及可调发光[J].发光学报,2024,45(3):450-457,8.基金项目
广西高校中青年教师科研基础提升项目(2022KY1660,2022KY1661)Supported by Research Foundation Improvement Project for Young and Middle aged Teachers in Guangxi Universities(2022KY1660,2022KY1661) （2022KY1660,2022KY1661）
