硒化镉CdSe量子点的制备和应用

SynthesisandApplicationsofCdSeQuantumDotsSpeaker:林天全OtherMembers：刘海涛冷雪李菲李魁1精选课件Aquantumdotisanano-particulatesemiconductor,whoseexcitonsareconfinedinallthreespatialdimensions.WhatareQuantumDots?2精选课件StructureofCdSeQuantumDots

ZincblendeWurtziteRocksalt戴全钦.吉林大学博士学位论文，20073精选课件Cd(CH3)2+TOPSe+TOPOCdSe/TOPONucleation

CoolingSolvent:TOPO(300℃)CombiningInjectingSolutionB:Se+TOPSolutionA:Cd(CH3)2+TOPMITM.G.

Bawendi,etal.J.Am.Chem.Soc.

1993,115(19):8706-8715.Preventfurthernucleation4精选课件RoomtemperatureopticalabsorptionspectraofCdSenanocrystallitesdispersedinhexaneandranginginsizefrom~1.2nmto11.5nm.M.G.

Bawendi,etal.J.Am.Chem.Soc.

1993,115(19):8706-8715.5精选课件CdO+TOPSe+TOPO+TDPACdSeSolution(270℃)TDPA+TOPO(300-320℃)CdOSe+TOPNucleationDissolvingCoolingInjectingCoolingX.G.Peng,etal.J.Am.Chem.Soc,2001.123(1):183-184.6精选课件CdO+Se/ODE+ODE=CdSeX.G.Peng,etal.

AngewandteChemie-InternationalEdition,2002,41(13):2368-2371.Mixture(300℃)OA+ODECdOSe+ODENucleationDissolvingHeatingInjectingCooling7精选课件L.J.An,etal.JournalofPhysicalChemistryC.2007,111:5661-5666.Versatiletwo-phaseapproachtosynthesizehighlyluminescentCdE(E=S,Se,Te)QDs.8精选课件CdAc2+Na2SeSO3CdSeY.D.Li.InorganicChemistry.2021,47(11):5022-5028.NaOHOAC2H5OH+H2OCdAc2·H2ONa2SeSO3DissolvingBystiringBystiringAutoclave(40-150℃)NucleationSeOSOOGreenMethods9精选课件FluorescenceoftheCdSewithdifferentemission(λex)365nmY.D.Li,etal.InorganicChemistry.2021,47(11):5022-5028.10精选课件Q.J.Sun,etal.

NaturePhotonics.2007,1,717.TEMCore–shellstructuresPhoto-luminescence11精选课件ApplicationsofQuantumDotsLEDSolarcellBiologicalprobeMedicalImagingBiochipLaserdevicesBiologicalLabelingDrugScreening12精选课件MartinGreen“Theemergenceofsemiconductornanocrystalsasthebuildingblocksofnanotechnologyhasopenedupnewwaystoutilizetheminnextgenerationsolarcells.〞13精选课件①PhotoelectrodescomprisingquantumdotsarraysSemiconductornano-structurepolymersolarcellQuantumDotSolarCellMetal-semiconductorphotovoltaiccell

QuantumdotsensitizedsolarcellA.J.Nozik.PhysicaE,2002(14):115-200.Fourmajorwaystoutilizesemi-conductordotsinsolarcellPrashantV.KamatA.J.Nozik14精选课件Schematicdiagramshowingthestrategiestodevelopquantumdot(semiconductornanocrystal)basedsolarcells:(a)metal-semiconductorjunction(b)polymer-semiconductor(c)semiconductor-semiconductorsystemsPrashantV.Kamat.J.Phys.Chem.C,2021,112(48):18737-18753.15精选课件Quantumdotsensitizedsolarcell—QDSSCPrincipleofoperationofquantumdotsensitizedsolarcell

ChargeinjectionfromexcitedCdSequantumdotsintoTiO2nanoparticlesisfollowedbycollectionofchargesattheelectrodesurface.Theredoxelectrolyte(e.g.sulfide/polysulfide)scavengestheholesandthusensuresregenerationoftheCdSe.Lopez-Luke,T.J.Phys.Chem.C.2021,112:1282–1292.Nitrogendoped16精选课件ChargeinjectionofexcitedCdSequantumdotintoTiO2nanoparticle.Theschemeontherightshowsthemodulationofenergylevels(andhencethechargeinjection)bysizecontrol.PrashantV.Kamat.J.Phys.Chem.C,2021,112(48):18737-18753.Quantumdotsensitizedsolarcell—QDSSC17精选课件Left:Thedependenceofelectrontransferrateconstantontheenergydifferencebetweentheconductionbands.Right:SchemeillustratingtheprincipleofelectrontransferfromtwodifferentsizeCdSequantumdotsintoTiO2nanoparticle.PrashantV.Kamat,J.Am.Chem.Soc.

2007,129:4136–4137.Quantumdotsensitizedsolarcell—QDSSC18精选课件LinkingCdSeQDstoTiO2SurfacewithaBifunctionalSurfaceModifierPrashantV.Kamat.J.Phys.Chem.C,2021,112(48):18737-18753.PrashantV.Kamat.J.AM.CHEM.SOC.

2006,128:2385-2393.19精选课件I-Vcharacteristicsof(a)OTE/TiO2and(b)OTE/TiO2/MPA/CdSefilms.Electrolyte0.1MNa2S.BifunctionalorganicmoleculeabPrashantV.Kamat.J.AM.CHEM.SOC.

2006,128:2385-2393.Fastcaptureofelectronsatthequantumdotinterfaceremainsamajorchallengeforefficientharvestingoflightenergy.20精选课件PhotocurrentgenerationusingCdSe-nC60compositeclustersPrashantV.Kamat.J.Phys.Chem.C,2021,112(48):18737-18753.EmergingStrategiestoCaptureandTransportPhotogeneratedElectronsIPCE：IncidentPhotontoCurrent-generationEfficiency21精选课件PrashantV.Kamat.J.Phys.Chem.C,2021,112(48):18737-18753.Left:PhotocurrentresponseasafunctionoftheamountofTiO2depositedoncarbonfiberelectrode(CFE)；Right:SchemeshowingtheelectrontransportthroughSWCNTandSEMimageoftheSWCNT-TiO2co