Molecular design of a wide-band-gap conjugated polymer for efficient fullerene-free polymer solar cells

Abstract

Two p-type conjugated polymers with disparate optical and electronic properties, PB3T and PB2T, were developed and applied in fullerene-free polymer solar cells (PSCs). The photovoltaic performance of the PB3T-based PSC device processed by anisole achieved a high power conversion efficiency of 11.9% with a J_sc of 18.8 mA cm⁻² and V_oc of 1.00 V.