Versatile Role of Solvent Additive for Tailoring Morphology in Polymer Solar Cells for Efficient Charge Transport.

摘要: In this work role of solvent additive namely 1,8 diiodoctane (DIO) on the nanoscale morphology and its relation with charge transport poly(diketopyrrolopyrrole-terthiophene) (PDPP3T):PCBM solar cells has been investigated. Addition DIO led to enhanced structural ordering as observed from optical measurements. Photovoltaic devices processed showed improved efficiencies due significant enhancement in short circuit current density. Atomic force microscopy (AFM) Kelvin probe (KPFM) images that finer phase segregation gave rise better photovoltaic performance active layers. Photoinduced extraction by linearly increasing voltage (P-CELIV) measurements PDPP3T:PCBM revealed higher mobility extracted carrier density for devices.