YszSubstrate Formamidinium_lead_iodide HBN Spincast heterojunctions temperature_control Butterfly OrganicSemiconductor BTO Annealing Yttria_stabilized_Zirconia Fe_film VerticalPFM #EC PVAC NCM\ AM-KPFM rubber PhaseChange MagneticForce SolarCell Mechinical contact TempControl KAIST BiFeO3 BismuthVanadate India WPlug SPMLabs margarine PVA ferromagnetic LiquidCell Film