薄膜型太阳能电池

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1、Latestdevelopmentsinthin-filmencapsulanttechnologyAugust18,2011J.I.KimRegionalTechnicalServicesLeaderDuPontPhotovoltaicSolutions©DuPontMaterialsCostImpactonPVCells&ModulesBillofMaterialsOtherMat’ls(12%)OtherMaterials(4%)JunctionBox(5%)ConductiveRibbon(1%)EncapFilm(6%)ReflectorPaint(4%)FrontGla

2、ss(6%)JunctionBox(6%)BacksheetFilm(8%)EncapsulantFilm(7%)MetallizationPastes(12%)Gases&Targets(11%)SiliconGlassorBacksheet(13%)Metal(51%)ModuleFrame(25%)TCOFrontGlass(29%)CrystallineSiliconThinFilmWithencapsulantsatonly6-7%ofmodulecost,thelargestcostimpactcomesfromchoosingtheoptimalencapsulant

3、toenableoverallsystemcostreductionsExamplesofRequiredEncapsulantAttributesEncapsulantRequirementsforThinFilmGlass/GlassModulesDurability25yearsnodelaminationCellefficiencyoverlifeofmoduleMeetsoperatingtemperaturerequirementsLowSystemCostCompatibilitywithTopCoatMaterialLowMoisturePermeabilityPr

4、otecttheCellfromCorrosionHighResistivity=LowCurrentLeakageSafetyrequirementImportantinmaintainingcellefficiencyoverlifetimeEaseofProcessingwithHighThru-putAutoclaveVacuumlaminatorNoLaminationDefectsNobubblesEaseofHandlingRelativePerformanceofEncapsulantsinThinFilm,Glass/GlassModulesEncapsulant

5、Materials*PropertyImpactEVAPVBPolyolefinIonomerResistivity•ElectricalInsulationMoistureIngress•CelldegradationUVDurability•Yellowing/DegradationHighModulus•LaminatestrengthLowModulus•InternalStressReliefThermoplastic•Yield,reworkTransmittance•ModuleEnergyOutputFlowProperties•Workswithmultiplel

6、aminationtechnologiesPoorBest*ColorsbasedonpublisheddataorDuPontInternalTestingPerformanceSpectrumDPVSTechnologyRoadmap-ThinFilmRigid2009201020112012SavingsAdvancedTCOLayers•Newoxidesystemswithbettercost-performance.UptoFrontEndFrontGlassEnhancements$0.20/W•Materialsandprocessestoimprovelightt

7、rapping,selfcleaning.PV5200Encapsulant•OptimizedPVBbasedfilmsforglass-glassmodules.PV5300Encapsulant•Highstrength/lowpermeabilityfilmsforreducedsystemcosts.UptoBackEnd$0.20/WFunctionalizedEncapsulants•HigherreflectivityPVB&ionomersystem