P1-1956Dual Interface Engineering in Sn–Pb Perovskite Films for Enhanced Photovoltaic EfficiencyKey Words: Buried Interface, Defect Passivation, Sn-Pb PerovskiteMyresearchonperovskitesolarcellsaimstoaddressthegrowingglobaldemandforclean,affordable,andsustainableenergy.Bydevelopinghighlyefficientandstableperovskitematerials,thisworkseekstoovercomethelimitationsofconventionalsilicontechnologiesandpromotelarge-scalesolarenergycommercialization.Myresearchalsopromotescarbonneutralitybyensuringabundantandcleansolarenergy.⚫Functionalgroups–NH3+and–COO-ofEDADAsynergisticallymodifiedbottomandtopperovskiteinterface.⚫ChelatinginteractionwithSn2+andsuppressedSn2+oxidation.⚫AchievedPCEof23.30%andshowedstabilityinMPPT.ConclusionResults and Discussions⚫Designself-healingmolecularcrosslinkersthatdynamicallyrepairSn-vacanciesandsuppressionmigrationandimprovedeviceperformance.⚫Templatecrystalgrowthpromotestableandlargeareadevice.Future PlanIntroductionThisresearchfocusesonimprovingtheefficiencyandstabilityoflead-tin(Pb-Sn)perovskitesolarcells,addressingthesignificantchallengescausedbySnoxidationandinterfacialdefects.Iutilizestrategiesformodifyingboththebottomandtopinterfacestosuppressdefectsandimprovechargetransportation.Thisapproachoffersimprovementofdevicesperformance.Theme underDiscussionPhotovoltaic Materials Group, GREEN Md Abdul KarimE-mail：： KARIM.MdAbdul@nims.go.jpFig.(a)PEDOT:PSSfilmsfabricationprocess.(b)DevicestructureofSn-Pb-basedPSC.(c)Chemicalstructureofadditive.(d)Schematicpresentationofbothinterfacemodification.XPSof(e)S2pand(f)C1sforPEDOT:PSSfilms.(g)SEMofburiedinterfacesforControlandEDADAperovskitefilms.(a)(b)(c)Fig.(a)NMRand(b)FT-IRfordifferentadduct.TopviewSEMimagesof(c)Control,(d)EDADA,and(e)Targetperovskitefilms.(a)(b)(d)(e)(f)(g)(c)(d)(e)(a)(b)(c)(d)Fig.XPSofSn3d5/2for(a)Controland(b)Targetperovskitefilms.(c)J-Vcurvesand(d)IPCEofSn-Pbperovskitesolarcells.
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