Rational Design of High Performance Conjugated Polymers for Organic Solar Cells

The research on the polymer based solar cells (PSCs) has attracted increasing amount of attention in recent years and great progresses have been made in the field of bulk heterojunction (BHJ) polymer solar cells since its inception in 1995. The power conversion efficiency (PCE) has increased from 1% in the 1990s to over 9% just recently. These great advances are mainly fueled by the development of conjugated polymers used as the electron-donating materials in BHJ solar cells. My research was focused on the rational design of those conjugated polymers. And first we investigated the positioning effect of alkyl side chains on the properties of conjugated polymers and find the best attaching position where high…