Side chain engineering of n-type conjugated polymer enhances photocurrent and efficiency of all-polymer solar cells†
Abstract
Side chain engineering of an n-type polymer provides a means of maintaining solubility while increasing crystallinity and electron mobility, leading to enhanced photocurrent. Bulk heterojunction solar cells composed of a side chain engineered copolymer (PNDIS-30BO) as acceptor and PSEHTT as donor give 10.4 mA cm−2 photocurrent and 4.4% efficiency.