A Solution‐Processable Small Molecule Based on Benzodithiophene and Diketopyrrolopyrrole for High‐Performance Organic Solar Cells

Abstract

A linear solution-processable small molecule (BDT-2DPP) based on 5-alkylthiophene-2-yl-substituted benzodithiophene and diketopyrrolopyrrole is designed and synthesized. BDT-2DPP exhibits strong and broad absorption with low band gap, low lying energy levels matching with PC61BM and high hole mobility. Solution-processed organic solar cells based on BDT-2DPP:PC61BM blend showed power conversion efficiencies as high as 5.79%. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.