中德PV会议(英利新能源)太阳能光伏专用资料很有用的

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1、AdvancedHybridSiliconSolarCellsDr.GuoxiaoYaoCTOofTianweiYingliNewEnergyResourcesCo.姚国晓博士首席技术官中国天威英利新能源有限公司2007年5月10日2007SNECInternationalSolar&PVConferenceFeaturesofMetallizationforScreenPrintingSiliconSolarCellsFeaturesofMetallizationforBuriedContactSiliconSolarCellsFeatu

2、resofMetallizationforHybridSiliconSolarCellsProcessingTechnologyofMetalStencilsLaser-ProcessedSingle-Level&Double-LevelStainlessSteelStencilPerformanceofHybridSiliconSolarCellsConclusionsContentsAdvantages:Goodavailabilityofscreenprintingmachine&firingfurnaceinthemarket;Si

3、mplicityofprocessingsequence.Disadvantages:Relativelywiderfingerwidth(~150um),leadingtohighershadingloss(~10%);Relativelylowerheight-to-widthaspectratio(~0.06),leadingtohigherresistiveloss,lowerFF.Loweropeningpercentage(~40%)ofscreen&gradualdegradationofprintinglineswithth

4、ewearandtearoftheemulsionlayer.FeaturesofMetallizationforScreenPrintingSolarCellsrearmetalcontact2-3mm~150umFigure1:ThestructureofscreenprintingsolarcellsAdvantages:Veryfinetopfingerwidth(~25um),leadingtolowershadingloss(~3%);Prettyhighheight-to-widthaspectratio(ashighas5)

5、,leadingtolowerresistivelosses,higherFF;Lowercontactresistance,furtherreducingtheresistiveloses,increasingFF.Disadvantages:Muchlongermetallizationprocess;Consumingmorewetchemicals,lessenvironmentallyfriendly.Figure2:Thestructureofburiedcontactsolarcells~25umFeaturesofMetal

6、lizationforBuriedContactSolarCellsFigure3:SchematicofahybridsiliconsolarcellstructureSPAgcontactp-typeP+n+n++oxideSPAlcontact~50umAhybridsolarcellincorporatessomeoftheadvantagesofburiedcontactandscreenprintingtechnologiesAdvantages:Relativelyfinetopfingerwidth(~50um),leadi

7、ngtolowershadingloss(~6%);Relativelyhighheight-to-widthaspectratio(~0.5),leadingtolowerresistivelosses,higherFF;Simplicityofprocessingsequence.Disadvantages:Maskmanufacturingprocesscomplicated&costly;FeaturesofMetallizationforHybridSolarCellsMaskfabricationPatternalignment

8、KeyTechniquesApertureProfile:CellsideSqueegeeside40µmFoilLaserGaussianbeamprofile:MetalSt