Led用含氮化物红色荧光粉研究.docx

ABSTRACR摘要摘要近年来,InGaN基白光LED因为其出色的发光性质在照明世界中被广泛应用。传统的白光产生方式是由InGaN基蓝光芯片激发黄色荧光粉产生白光,但是这种白光光谱中的红色光的缺失造成该白光的色温高、显色性能差,因此,为了获得高显色性低色温的白光,红色荧光粉被应用于白光LED中。Eu2+激活的氮化物红色荧光粉可以被蓝光或紫外光有效激发,发射出590-680nm的红光。这种荧光粉具有出色的温度特性和化学稳定性,且波长可调范围广、发光效率高,从而吸引了越来越多的关注。白光LED是一种符合环保和节能的绿色照明光源,而红色荧光粉的性能对白光LED的显色指数及色温的影响极其显著。氮化物体系红色荧光粉是一种非常优质的LED用荧光粉。介绍了氮化物红色荧光粉的研究现状、晶体结构、主要的制备方法,针对目前还存在的一些问题,指出了今后的研究方向。关键词:氮化物荧光粉发光白光LEDCaAlSiN3：Eu2+ABSTRACTABSTRACTInGaN-basedwhiteLEDiswidelyappliedinthelightingworldforitsexcellentLuminescentproperties.ThetraditionalwhitelightconslstsofahighperformanceblueledandyellowPhosPhor,butthewhitelightsPeetrumProdueedbythiswaylacksred1ightandcausedhighcolortemperatureandpooreolorperformance.Therefore,inordertomeettheLEDneedsofhighCRI(colorrenderingindex)andlowcolortemperature,redphosphorsareappliedtowhiteLED.Eu2+aetivatednitrideredphosphorcanbeeffectivelyexcitedbyultravioletorbluelightandemit590-68Onmred1ight.Thisphosphornotonlyhasexcellentthermalstabilityandchemicalstability,butalsohaswideemissionwavelengthrangeandhighluminouseffieiency,forwhichattractedmoreandmoreattention.WhiteLEDisakindofenvironmentalandenergy-savinggreenlighting.HowevertheperformanceoftheredemittingphosphorcanaffectthecolorrendingindexandthecolortemperatureofthewhiteLEDextremely.Andthenitrideoroxynitrideredphosphorisaveryhigh-qualitykindforthewhiteLED.Thepresentresearchsitua-tion,crystalstructure,primarypreparationtechnologyofthenitrideandoxynitrideredphosphorsareintroduced.Fortheexistingproblemsintheresearch,thenewresearchdirectionispointedout.KeyWord：:nitrides;phosphorus;luminescence;whiteled;CaAlSiN3：Eu2+目录目录目录TOC\o"1-3"\h\uHYPERLINK\l_Toc25722第一章绪论PAGEREF_Toc257221HYPERLINK\l_Toc264091.1研究意义PAGEREF