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新型彩色长余辉材料的制备及其发光性能的研究 Abstract Inrecentyears,luminousmaterialshavebecomeanimportantresearchtopicinthefieldofmaterialsscience.Inthisstudy,wepreparedanovelluminescentmaterial,colorpersistentluminescencematerial(CPL)usingasimplesol-gelmethod.WeinvestigatedthepreparationprocessandtheluminescenceperformanceoftheCPLmaterial. TheresultsshowedthatthesynthesizedCPLmaterialhadexcellentluminescenceproperties.Theemissionspectrumindicatedthatthematerialexhibitedredandyellowemissioncolorsunderdifferentexcitationwavelengths.Thepeakemissionwavelengthwas660nmand573nm,respectively.Moreover,theCPLmaterialexhibitedlongpersistence,andtheafterglowintensitycouldbeobservedformorethan10hoursafterthelightsourcewasturnedoff. ThemechanismoftheCPLmaterial'spersistentluminescencewasalsodiscussed.Werevealedthattheluminescencebehaviorwasduetotheelectrontransferbetweenthehostlatticeandthedopantion.Besides,thepeakemissionwavelengthwasattributedtotheenergytransferredfromthehostlatticetothedopantion. Insummary,ourstudypresentsafacilesol-gelmethodtoprepareCPLmaterialswithexcellentluminescenceproperties.ItprovidesinsightfulimplicationsforfurtherresearchonCPLmaterials,whichhavegreatpotentialasnovelopticalmaterialsinvariousfieldsincludingsolid-statelighting,bio-imaging,andsecurityapplications. Introduction Inrecentyears,persistentluminescencehasattractedincreasingattentionduetoitsuniqueopticalproperties.Basedontheabsenceofbackgroundlightinterference,whichcanimprovethedetectionandimagingsensitivity,novelapplicationshavebeenexplored,suchasinsecuritytags,fingerprintdetection,andanticounterfeitinglabels[1-3].Forinstance,Ba2xSio4:Eu2+,R3+persistentluminescencenanophosphorshavebeenresearchedforsecurityfeaturesinthermoplasticpolymerfilms[4].Inaddition,persistentluminescencematerialsareofgreatinterestforbiomedicalimagingapplications.ZnS:Cu,Cr;MgOpersistentluminescencenanoparticlesarereportedasanexcellentcandidateforbiophotonicimagingapplicationsowingtoitssuperiordeeptissueimagingperformance[5].Recently,alotofrese