P1-1552Development of Interface Materials for Efficient and Stable Perovskite Solar CellsKey Words: Photovoltaics, interface layer, Solar cells, Metal halide perovskiteSolarpowergenerationisoneofthekeydevicessupportingfuturesustainablesocieties.However,conventionaltechnologiesfacechallengessuchashighelectricitycostsandinstallationsiteconstraints,makingsustainedadoptiondifficult.Thisresearchaimstodevelopgroundbreakingnext-generationmaterialsthatovercomethelimitationsofconventionaltechnologies,advancingthedevelopmentofsolarcellsutilizingperovskitecrystals.⚫The sputtered NiOx layer was deposited as HTL at room temp, and better thermal stability was achieved.⚫The sputtered ITO layer before the electrode prevented the electrode degradation due to ion migration.⚫The combination of NiOx and ITO layer improved stability.ConclusionDevice structure and stabilityFuture PlanIntroductionPerovskitesolarcellsfeaturelow-temperaturecoatingprocessesachievablearound100℃andexcellentperformance,includingconversionefficienciesalreadyexceeding20%.However,criticaldurabilityissueshavepreventedpracticalapplication.Wedevelopednewinterfacematerialsandfabricationprocessesenablinglow-temperaturefilmformationtoovercomedurabilitychallenges,whileachievinghigherperformancethroughinterfacetreatment.Theme underDiscussionPhotovoltaic materials group, GREEN Yasuhiro ShiraiE-mail：： Shirai.yasuhiro@nims.go.jpCharacterization results⚫Develop new interface materials to achieve higher stability under simultaneous heat and light stress.⚫Explore the combination of wide-bandgap perovskites and new interface materials for higher Voc.⚫Investigate the functions of new interface materials
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