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1、Preparationandluminescentcharacteristicsofsilicon-nitrogenbasedphosphorforwhiteLEDAbstract：Energycrisisandenvironmentalpollutionaretwomajorchallengesthatthehumanface,theyarealsothemajortaskthatmustbegivenprioritytotheimplementationofsustainabledevelopmentstrategyinChina.Thewayt
2、osolvetheglobalenergyshortageisthestrategyofdevelopingenergyefficienttechnologies,greenenvironmentalprotection.Whitelightemittingdiode(whiteLightEmittingDiode,referredtoasWLED)isanewtypeofsolidstatelighting,comparedwiththetraditionallightingsource,whiteLEDattractswidelyattentio
3、nbecauseoftheadvantagesofhighefficiency,energysaving,environmentalprotection,greenlighting,long-lifeadvantages,thereforeinthe"sustainabledevelopment"background,ithasbeenexpectedinthefourthgenerationoflightingsource.Nowadays,methodstoobtainwhitelightaremainlythroughtheLEDchipsan
4、dthephosphors.Therefore,asanimportantpartofthewhitelightLED,phosphorperformancedirectlyaffectsthewhiteLEDluminousefficiency,colortemperature,colorrenderingindex,lightandlife.Thestudyshowsthat,rareearthdopedsiliconnitrogencompoundsfluorescentpowderhasmanyexcellentpropertiesbecau
5、seofspecialcrystalstructure,,suchasgoodstability,emittingwavelengthtunable,nearultravioletorbluelightLEDchipexcitation,temperaturequenchingeffectisweak,withwhichithasbeenthemostapplicationvalueofanewtypeofwhiteLED2+phosphors.ThisthesischoosestheMSi2O2N2:Eu(M=Ca,Sr,Ba)andBa3Si6O
6、9N4:RE1,RE22+2+2+3+3+3+3+3+(RE1,RE2=Eu,Mn,Mg,Ce,Dy,Er,Yb,Tb)phosphorpowderastheresearchobject,itgivesadetailedstudyofthehightemperaturesolidphasemethodandanalysisoftheluminescencecharacteristics.Atthesametimethethesisusestwo-steptoobtainBa3Si6O9N4phosphorsandanalysisthesimilari
7、tiesanddifferencesbetweentwo-steptoobtainBa3Si6O9N4phosphorsandhightemperaturesolidphasesynthesis.2+1.MSi2O2N2:Eu(M=Ca,Sr,Ba)phosphorswerepreparedbyhightemperaturesolid-state2+method.SystemresearchtheMSi2O2N2:Eu(M=Ca,Sr,Ba)phosphorsluminescenceproperties2+withdifferentsynthesis
8、temperatureandEu-dopingconcentration.Theemissionspectr
