Semiconduction conjugated polymers based on diketopyrrolopyrrole for high efficient polymer solar cells

Abstract

Recently, diketopyrrolo[3,4-c]pyrrole (DPP) has emerged as an important building block of active layer materials for the optoelectronic applications including both organic fieldeffect transistors (OFETs) and organic photovoltaics (OPVs). Particularly, semiconducting conjugated polymers (SCPs) based on DPP exhibited high hole mobility up to 1.0 cm2·V-1·s-1 in OFETs and promising power conversion efficiencies (PCEs) of 4.5−5.5% in OPVs when DPP is copolymerized with electron-rich monomer such as thiophene, naphthalene and benzene.