P1-1855Interface Engineering with n-Type polymer for Sn-based Perovskite Solar CellsKey Words: Passivation, defects, coordination, N2200. •Sn-perovskitesolarcells(Sn-PSCs)haveattractedtremendousattentionasanalternativetotoxicPb-halideperovskitefortheiroptimumphotovoltaicproperties•However,theSn-PSCssufferfromlowopencircuitvoltage(VOC)duetohighersurfacedefectsandenergylevelmismatchwithcommonlyusedchargetransportlayers(PCBM)⚫ThePCBMdopingwithN2200tunedtheenergylevelofPCBMandsimultaneouslypassivatedtheSn-perovskitefilm’ssurfacedefects⚫Asaresult,theN2200dopedPCBM-basedSn-PSCsshowedsuperiordeviceperformanceandremarkablestability.ConclusionResults and Discussion⚫Tillnow,theoptoelectronicpropertiesofSn-perovskitefilmsarefarbehindthoseofPborPb-Snperovskite.⚫WewillfocusonthedevelopmentofoptoelectronicSn-perovskitefilmstoreplacePbfromPSCs.Future PlanIntroduction•PCBMwasdopedwithann-typepolymer(N2200)totuneitsenergylevelandpassivateFASnI3surfacedefectsbycoordinatingwithSn2+.•Asaresult,N2200-dopedPCBMPSCsachievedaVOCof0.79VandaPCEof12.98%(certified11.95%).Theme underDiscussionPhotovoltaic Materials Group, GREEN KAYESH Md EmrulE-mail：： KAYESH.MdEmrul@nims.go.jpFig. (a) PL and (b) TRPL Fig. 1HNMR spectraFig. (a) deconvoluted XPS spectra(a)FASnI3PCBMPCBM:N22003.624.13.93(b)(c)Fig. AC-3E spectra (a)(b)bca(a)(b)(a)(b)Fig. (a) J–V curve and (b) operational stability under MPPT condition.JSC(mA/ cm2)VOC(V)FFPCE(%)PCBM21.900.720.7011.04PCBM:N220022.50.790.7312.98Fig. Certification report from AIST
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