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ZnO Quantum-dot Modified Silicone Resins with Tunable Luminescence and High Refractive Index  
ZnO Quantum-dot Modified Silicone Resins with Tunable Luminescence and High Refractive Index
资料类型: PDF文件
关键词: quantum-dot  silicone  luminescence  refractive  index  
资料大小: 108K
所属学科: 分子表征
来源: 第六届亚欧研讨会上处理和性能增强聚合物会议文集(2013.6.2-6 武汉)
简介:
Duetotheirhighpowerefficiency,goodreliabilityandlonglifetime,etc,solidstatelightingemittingdiodes(LEDs)haveattractedgreatinterestsforgeneralilluminationcl].Inconventionallow-powerLEDtechnology,transparentepoxyresinsareemployedaspackagingmaterials.However,asthepowerincreases,thesevereyellowingofepoxyresinswouldoccurandsignificantlyreducethelifetimeofLEDsC2].Siliconeresinsareakindofhighlytransparentmaterialswithexcellentheatresistantproperty,servingasalternativepackagingmaterialstoepoxyresins[3].Wehavereportedthevisible-light-transparentandemission-tunableZn0quantumdot(QD)/siliconecompositesandZnoQDSi02/siliconecomposite[4‘5].Nonetheless,theemissionwavelengthisinalimitedrangeandthestabilityisnotsatisfactoryenough.Inthepaper,surfacemodifiedZnoQDsviasilanizationduringthegrowthprocesswereuniformlydispersedinasiliconeresinbyasolventmixingmethod.Thecompositesarevisible-light-transparentandstableinfluorescencebeforeandafterprocessing.AsthesizeofZnoQDdecreases,theemissionpeakchangesfrom523t0405nmunderUV-Iightirradiation,showingobviousquantumsizeeffect.TheemissionpeakofsilanesurfacemodifiedZnoQD/siliconecompositesred-shiftedonlyl-4nm,showinghigherstabilitycomparedtothat(8-38nm)oftheunmodifiedZnoQD/siliconecomposites.Inaddition,astheZnoQDmassfractionincreases,therefractiveindexofthecompositesincreases.ThenovelZnoQDmodifiedsiliconecompositeshavepotentialapplicationsinLEDilluminationanddisplaytechnologies.
作者: H. Q. Shi, S. Y. Fu
上传时间: 2013-06-27 13:17:18
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