Abstract
Two high bandgap donor-acceptor polymers based on benzodithiophene with different alkyl side chains and fluorinated benzotriazole are designed and synthesised. Due to the deep HOMO energy level and high hole mobility of the octylthio substituted polymer PBDTTS-FTAZ, it exhibits higher efficiency of 8.3% in bulk-heterojunction solar cells. This indicates the advantages of alkylthio over alkyl for the design of conjugated polymers. 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.
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