DuPontPhotovoltaicSolutions©DuPontLatestdevelopmentsinthin-filmencapsulanttechnologyAugust18,2011J.I.KimRegionalTechnicalServicesLeaderMaterialsCostImpactonPVCells&ModulesCrystallineSiliconThinFilmSiliconMetal(51%)BillofMaterialsMetallizationPastes(12%)BacksheetFilm(8%)FrontGlass(6%)EncapFilm(6%)JunctionBox(5%)OtherMat’ls(12%)TCOFrontGlass(29%)ModuleFrame(25%)GlassorBacksheet(13%)Gases&Targets(11%)EncapsulantFilm(7%)JunctionBox(6%)ReflectorPaint(4%)ConductiveRibbon(1%)OtherMaterials(4%)Withencapsulantsatonly6-7%ofmodulecost,thelargestcostimpactcomesfromchoosingtheoptimalencapsulanttoenableoverallsystemcostreductionsExamplesofRequiredEncapsulantAttributesDurability25yearsnodelaminationCellefficiencyoverlifeofmoduleMeetsoperatingtemperaturerequirementsLowSystemCostCompatibilitywithTopCoatMaterialLowMoisturePermeabilityProtecttheCellfromCorrosionHighResistivity=LowCurrentLeakageSafetyrequirementImportantinmaintainingcellefficiencyoverlifetimeEaseofProcessingwithHighThru-putAutoclaveVacuumlaminatorNoLaminationDefectsNobubblesEaseofHandlingEncapsulantRequirementsforThinFilmGlass/GlassModulesPVBEncapsulantMaterials*PolyolefinPropertyResistivityMoistureIngressUVDurabilityHighModulusLowModulusThermoplasticTransmittanceFlowPropertiesImpact•ElectricalInsulation•Celldegradation•Yellowing/Degradation•Laminatestrength•InternalStressRelief•Yield,rework•ModuleEnergyOutput•WorkswithmultiplelaminationtechnologiesEVAIonomerRelativePerformanceofEncapsulantsinThinFilm,Glass/GlassModules*ColorsbasedonpublisheddataorDuPontInternalTestingPoorBestPerformanceSpectrumBOSBackEndFrontEndDPVSTechnologyRoadmap-ThinFilmRigid2009201020112012PV5200Encapsulant•OptimizedPVBbasedfilmsforglass-glassmodules.PV5300Encapsulant•Highstrength/lowpermeabilityfilmsforreducedsystemcosts.FunctionalizedEncapsulants•HigherreflectivityPVB&ionomersystemsforefficiencygains.Upto$0.20/WModuleInstallation•Integratedmaterialsolutionsfortotalinstalledsystemcostreduction.>$0.8/WcostreductiontargetUpto$0.45/WUpto$0.20/WSavingsAdvancedTCOLayers•Newoxidesystemswithbettercost-performance.FrontGlassEnhancements•Materialsandprocessestoimprovelighttrapping,selfcleaning.BackEndProcessimprovement•Optimizedencapsulant&laminationprocesses.EnablingMaterialsReducedLCOEvia:InnovationMaterialsInnovationsContributetoLowerCostsReflectiveEncapsulantFilmsModuleCostEncapsulantsThinhighreflectiveencapsulant…•DuPont™PV52230250100encapsulantfilmsintroducedtomarketinApril2010•50%higherreflectivity•Paintelimination����lowercost,processsimplification•40%encapsulantthicknessreduction00.10.20.30.40.50.60.70.80.913504505506507508509501050Wavelength,nmReflectancePV5223-0250100WhitepaintWiderLaminationprocessingwindow&lowermaterialconsumptionWhitereflectiveDuPont™PV5223-0250100encapsulantsheetistexturedforeasyde-airinginOerlikonSolar'smulti-stacklaminatingprocess.At0.45-mmthickness,newDuPont™PV5223–0250100whitePVBencapsulantsheetismorethan40%lighter-weightthantraditional0.76-mmclearPVB.EnablingMaterialsReducedLCOEvia:InnovationThermoplasticIonomerFilmsModuleCostEncapsulantsLowermoistureingress…•DuPontIonomerfilmwasintroducedtomarketin2009•Uniquepropertiesareidealforglass-glassPVmodules•Costsavingsof$3/panelbyeliminationofedgesealingPVmodulesmoistureingressafter2000hrDH0.000.050.100.150.200.250.300.350.400.450246810121416182...
