2区-Metal aerosol jet printing for solar cell metallization.pdf

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1、PROGRESSINPHOTOVOLTAICS:RESEARCHANDAPPLICATIONSProg.Photovolt:Res.Appl.2007;15:621–627Publishedonline5April2007inWileyInterScience(www.interscience.wiley.com)DOI:10.1002/pip.759ApplicationsMetalAerosolJetPrintingforSolarCellMetallization,yA.Mette*,P.L.Richter,M.Ho¨rteisa

2、ndS.W.GlunzFraunhoferInstituteforSolarEnergySystems,Heidenhofstr.2,D-79110Freiburg,GermanyMetalaerosoljetprintingisanewnon-contactdirect-writetechniqueforthefrontsidemetallizationofhighlyefficientindustrialsiliconsolarcells.Withthistechniquethefirstlayerofatwo-layercontact

3、structureiscreated.Itfeaturesalowcontactresistanceandgoodmechanicaladhesiontothesiliconsurface.Thesecondlayerisformedbylight-inducedsilverplating(LIP)toincreasethelineconductivity.Toformthefirstlayerametal-containingaerosoliscreatedintheprinterandfocusedviaasecondsurround

4、inggasstreamthroughanozzleanddepositedontothesubstrate.Thefocussinggasavoidsthecontactbetweentheaerosolandthenozzletip.Inaddition,linewidthssignificantlysmallerthantheoutletdiameterofthenozzletipcanbereached.Fineandcontinuouslineswithawidthof14mmwereprintedusingametalorga

5、nicink.Astheadhesionoftheselayerswasnotsufficient,acommerciallyavailablescreen-printingpasteforsolarcellmetallizationwasmodifiedandtested.Monocrystallinesiliconsolarcellsof12
5cmT12
5cmwithanaluminumbacksurfacefieldwereprocessed,achievingenergyconversionefficienciesupto17
8%

6、.Copyright#2007JohnWiley&Sons,Ltd.keywords:photovoltaiccells;metallization;aerosols;direct-write;contact-freeReceived5December2006;Revised13February2007INTRODUCTIONheindustrialimplementationofhigh-efficiencyconceptsforsiliconsolarcellsiscurrentlyunderextensiveinvestigatio

7、n.Fortherearsidemetallization,-passivationand-reflection,high-efficiencyT1conceptsasforexamplethelaser-firedcontactsarecurrentlytransferredintoindustry.Oneofthemainpotentialsforafurtherincreaseofefficiencyistheimprovementofthefrontsidemetallization.Thedifferencebetweentheeffi

8、cienciesachievedwithmostcurrentindustrialcelltechnologiescomparedtohigh-efficiency(laboratory)techniques