量子点简介及其显示器件课件

Nanoworld:Introductionofluminescentsemiconductornanocrystals--quantumdots(QDs)2015.02.06YuanchengCao,Dr.yuancheng.cao@Nanoworld:2015.02.06Yuanchen1❀Name

Quantumdot:semiconductornanocrystal;colloidalnanoparticle;semiconductornanocluster;artificialatom;……❀onorganisenanocrystal

II-VI:CdSe,CdTe,CdS,ZnSeIII-V:InP,InAs❀Fluorescentproperty

Whatitis?Whatitis?2RelationofcompenetsandemissionRelationofcompenetsandemis3QDs/PSEncoding

Whatitlookslike?HR-TEMimageQDs/PSEncodingWhatitlooks4QDs/PSEncoding

Howbigitis?QDProbeTEMimageQDs/PSEncodingHowbigitis5小鼠腹腔巨噬细胞吞噬量子点裸鼠注射大量剂水溶性量子点Isittoxic?小鼠腹腔巨噬细胞吞噬量子点裸鼠注射大量剂水溶性量子点Isi6Whyfluorescent－

QuantumconfinementeffectQuantumconfinementeffect:E(R)=Eg+h2π2/2μR2-1.8/εR△E＝E(R)-Eg=h2π2/2μR2-1.8/εR

△E>0,R<(h2π2ε/3.6μ)1/32.2nmCdSe5.0nmCdSeWhyfluorescent－Quantumconfi7QDs/PSEncodingFluo.spectraMulti-colorQDsimageWhyitissoattractive?QDs/PSEncodingFluo.spectraM8DisadvantagesoforganicdyesTexasRedFluoresceinPhotochemicalInstabilityRedtailNarrow“Broad”DisadvantagesoforganicdyesT9

Broadexcitation，narrowemissionQDandR6GBroadexcitation，narrowemiss10

QDsemission400nmto2umEmissioncanbeadjustedbythesizeandcomponentsQDsemission400nmto2umEmis11

Sameexcitationdifferentemission

Sameexcitationdifferentemi12Surfacemodification

Surfacemodification13量子点简介及其显示器件ppt课件14

GFPandQDGoodphotostabilityGFPandQDGoodphotostability15QD标记的稳定性确保对细胞的安全性，SanfordM.Simon,NatureBiotechnology,2003,21,48

BiocompatibilityConjugatedQDskeepthesamefluo.abilityQDsconjugationdoesnotaffecttheligandsinteractions.QD＋HeLacell(A)andQD-transferor＋HeLacell(B)QD标记的稳定性确保对细胞的安全性，SanfordM.S16图6：TheeffectsofincreasingtemperatureontherelativePLintensityofdifferentsizedCdTequantumdots:(a)3.5nm,(b)3.1nm,(c)2.8nm,and(d)denaturedovalbumin-QDs(3.5nm).图5：Spectraoftemperature-dependentCdTequantumdots(3.5nm).(a)Absorptionspectrumat280Kandphotoluminescencespectra(b→k)at:278K,283K,288K,293K,298K,303K,308K,313K,318K,323K.(λex=400nm).Talanta74(2008)724–729温度敏感性图6：Theeffectsofincreasing17红移：胶体性质聚集红移：18FRET：能力共转移FRET：能力共转移19光漂白光漂白20Howtomakeit?CoreNanocrystalInorganicShellCappingGroupOrganiccoatingFunctionalityCrosslinkerandBiomoleculeCoresynthesiscoatingSurfacemodification（油溶性QDs）Howtomakeit?CoreNanocrysta21量子点简介及其显示器件ppt课件22QDs复合材料QDs-SiO2QDs-TiO2QDs-Fe3O4QDs-Al（OH）3。。。。。。QDs复合材料QDs-SiO223Howmuchisit?£300:10molar,0.1ml!-8Moreexpensive

thanGOLDHowmuchisit?£300:10mola24量子点简介及其显示器件ppt课件25❀Biomoleculerinteraction❀lifescienceincell❀multi-colorimagine❀tissuephoto-imagine❀CellorbeadlabelingIsituseful?❀Biomoleculerinteraction❀li26QDsinbiomedicalfieldsQDsinbiomedicalfields27量子点显示技术的应用三星开发业界首款全彩量子点显示屏2011/2iPhone6杀手功能曝光量子点屏幕技术2014/2亚马逊Kindle

Fire

HDX7英寸版本2014/2目前，量子点有英国、德国、美国的三家企业竞相开发技术和争夺市场。量子点材料产量排在第一位和第二位的德国Nanosys和美国QDVision的供货量加起来，2013年内共向几百万台电视机供应了量子点材料。索尼采用特丽魅技术的BRAVIA电视展示2013/6量子点显示技术的应用三星开发业界首款全彩量子点显示屏iPho28Left：QDsdisplayRight：LEDdisplayQDs显示器的一般构件QDEF可取代LCD内部扩散膜的功能，以及将蓝光转换为绿光以及红光。（图片取自Nanosys）图4传统的白光LED显示器光谱（A）和QDs显示器光谱（B）的比较。Left：QDsdisplayRight：LEDdis29QDs显示器制备QDs显示器制备30量子点简介及其显示器件ppt课件31量子点简介及其显示器件ppt课件32量子点简介及其显示器件ppt课件33QDsLED（QLED）QDsLED（QLED）34量子点简介及其显示器件ppt课件35量子点简介及其显示器件ppt课件36QDs发光膜QDs发光膜37UVlightUVlight38referencePaulA.Alivisatos,Science1998,281,2013ShumingNie,Science1998,281,2016BenoitDubertret,Science,2002,298,1759MariaE.Åkerman,PNAS,USA,2002,19,12617ShumingNie,CurrentOpinioninBiotechnology,2002,13,40XingyongWu,NatureBiotechnology,2003,21,41SanfordM.Simon,NatureBiotechnology,2003,21,48MatthewJ.Mauro,NatureMaterials,2003,2,630CarolineSeydel,Science,2003,300,80MaximeDahan,Science,2003,302,442.WattW.Webb,Science,2003,300,1434HongxiaXu,NucleicAcidsResearch,2003,31,e43KimS,NatureBiotechnology,2004,22,93MichaelJ.Levene,JournalofNeurophysiology2004,91,1908Mich