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Presenter:XianjinGeGroupmembers:XianjinGe、YueyunFang、KaiGao、FuxingLin、MengSun、BingTang、MingyuTong、HaojieWang、MengmengZhangTime:Dec.25,2015PreparationofElectronTransportLayerforPerovskiteSolarCellIntroductionofPerovskiteSolarCell1PreparationofElectronTransportLayer2LookingForward3ContentPreparationofElectronTransportLayerforPerovskiteSolarCellPart1.IntroudctionofPerovskiteSolarCellbcdWorkingMechanismofPerovskiteSolarcellTheAdvantagesofPerovskiteSolarcellaTheCurrentSituationofSolarCellResearchPerovskiteCrystalStructurea.TheCurrentSituationofSolarCellResearchNationalRenewableEnergyLaboratory.BestResearch-CellEfficiencies,2015;/ncpv/images/efficiency_chart.jpg.SohrabAhmadiKandjani,SoghraMirershadiandArashNikniaz.Chapter8ofInorganic–OrganicPerovskiteSolarCells.P225,Figure3.b.PerovskiteCrystalStructure

A=OrganicB=PborSnX=halogenc.WorkingMechanismofPerovskiteSolarCellPerovskiteSolarCellStructureEnergyLevelsoftheMaterialsd.TheAdvantagesofPerovskiteSolarcellStrongsolarabsorptionLownon-radiativecarrierrecom-binationratesHigherenergyconversionefficienciesEaseoffabricationPart2.PreparationofElectronTransportLayerabcTiO2

aselectrontransportlayersZnOnanoparticlesaselectrontransportlayersSnO2nanoparticlesaselectrontransportlayersa.MesoporousTiO2aselectrontransportlayersFigure1.illustrationoffabricationprocessbyspin-coatingandelectrospraydepositionsol–gelelectrosprayspin-coatingspin-coatingspin-coatingevaporationdepositionFabricationprocessM.Kim,B.J.Kim,J.Yoon.(2015).Electro-spraydepositionofamesoporousTiO2chargecollectionlayer:towardlargescaleandcontinuousproductionofhighefficiencyperovskitesolarcells.Nanoscale,7,20725-20733M.Kim,B.J.Kim,J.Yoon.(2015).Electro-spraydepositionofamesoporousTiO2chargecollectionlayer:towardlargescaleandcontinuousproductionofhighefficiencyperovskitesolarcells.Nanoscale,7,20725-20733a.MesoporousTiO2aselectrontransportlayers

Electrospraydeposition(ESD)

Figure2.ComparisonofglassdepositedwithmesoporousTiO2layerbyESDbeforeandafterM.Kim,B.J.Kim,J.Yoon.(2015).Electro-spraydepositionofamesoporousTiO2chargecollectionlayer:towardlargescaleandcontinuousproductionofhighefficiencyperovskitesolarcells.Nanoscale,7,20725-20733a.MesoporousTiO2aselectrontransportlayersSpin-coatingandElectrospraydeposition

ProcessSEM

FillfactorConversionefficiency0.6913.7%0.7415.1%M.Kim,B.J.Kim,J.Yoon.(2015).Electro-spraydepositionofamesoporousTiO2chargecollectionlayer:towardlargescaleandcontinuousproductionofhighefficiencyperovskitesolarcells.Nanoscale,7,20725-20733a.MesoporousTiO2aselectrontransportlayersConclusion(b)ElectrosprayedTiO2layerexhibitsbetterperformance,

andPCEofdevicescanreachover15%.

moreporousstructurelowdensityofpointdefectslarge-areadepositionperformedcontinuouslyAdvantagesDevicearchitectureandenergy-leveldiagram

ElectrontransportlayerHoletransportlayerLightabsorberlayerb.ZnOnanoparticlesaselectrontransportlayersLiu,D.,&Kelly,T.L.(2014).Perovskitesolarcellswithaplanarheterojunctionstructurepreparedusingroom-temperaturesolutionprocessingtechniques.Naturephotonics,8(2),133-138.Fabricationprocesshydrolysisof

zincacetatein

methanolspincoated

ZnOnanoparticlesITO

spincoated

PbI2solution(dissolvedinN,N-dimethylformamide)

CH3NH3I

solution(in2-propanol)

dippingintosolutiondry

spiro-OMeTAD

solutionthermalevaporationdeposition

spincoated

silvercollectprecipitatesLiu,D.,&Kelly,T.L.(2014).Perovskitesolarcellswithaplanarheterojunctionstructurepreparedusingroom-temperaturesolutionprocessingtechniques.Naturephotonics,8(2),133-138.b.ZnOnanoparticlesas

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