人工晶体学报2025，Vol.54Issue(4)：652-662,11.DOI:10.16553/j.cnki.issn1000-985x.2024.0261
Dy3+掺杂SrAl2O4∶Tb3+余辉发光荧光粉余辉性能优化
Afterglow Performance Optimization of Dy3+Doped SrAl2O4∶Tb3+Afterglow Luminescent Phosphors
摘要
Abstract
SrAl2O4∶x％Tb3+(SAO∶Tb,x=0.3,0.5,1.0,2.0,3.0),SrAl2O4∶1.0％Tb3+,y％Dy3+(SAO∶Tb/Dy,y=0,0.5,1.0,3.0,5.0)series of residual luminescent materials were synthesized by high temperature solid phase method under air atmosphere.XRD patterns and SEM images show that the SAO∶Tb and SAO∶Tb/Dy samples are all pure phase.The excitation spectrum,emission spectrum and afterglow attenuation curves of SAO∶Tb show that the afterglow performance are best when the doping concentration of Tb3+is x=1.0.Dy3+co-doping experiments were carried out on SrAl2O4∶1.0％Tb3+,the sample with the better afterglow performance.The excitation and emission spectra intensities of SAO∶Tb/Dy series samples indicate that there may be exist energy transfer(ET)processes in SAO∶Tb/Dy phosphors.The afterglow attenuation curves further verify that the number of traps increase after Dy3+co-doping.Comparision with thermoluminescence curves intensities between SAO∶Tb and SAO∶Tb/Dy indicate that the number of traps in this material increases due to the inclusion of Dy3+,at the same time,after co-doping with Dy3+,the energy range between trap 1 and trap 2 is reduced,which makes it easier to release more electrons.Combined with the thermos luminescence curve and the luminaire surface temperature,the electron release temperature of SAO∶Tb phosphor trap 2 decrease from 117 ℃ to 97 ℃ while Dy3+are incorporated,so that all the trapped electrons can released rely on the heat from the luminaire,thereby converting some of the thermal radiation into visible light,therefore,the SAO∶Tb/Dy phosphors are not only free from the reducing atmosphere in preparation process,but also have potential application value in reducing lighting energy consumption and reducing the thermal radiation of lamp source.关键词
荧光粉/光致发光/Tb3+掺杂/Dy3+掺杂/长余辉/余辉机理模型Key words
phosphor/photoluminescence/Tb3+doping/Dy3+doping/long afterglow/afterglow mechanism model分类
数理科学引用本文复制引用
舒建,李胜男,姜义,贾振国..Dy3+掺杂SrAl2O4∶Tb3+余辉发光荧光粉余辉性能优化[J].人工晶体学报,2025,54(4):652-662,11.基金项目
吉林省科技厅自然科学基金(YDZJ202201ZYTS321) （YDZJ202201ZYTS321）
吉林省教育厅优秀青年基金(JJKH20240779KJ) （JJKH20240779KJ）
