Ï -conjugated naphthodithiophene homopolymers bearing alkyl/alkylthio-thienyl substituents: Facile synthesis using hexamethylditin and their charge-transport and photovoltaic properties

Hideaki Komiyama, Tatsuya Oyama, Tatsuya Mori, Takuma Yasuda

Research output: Contribution to journalArticle

Abstract

Two -conjugated naphtho[1,2-b:5,6-b']dithiophene (NDT)-based homopolymers functionalized with alkyl-thienyl or alkylthio-thienyl side chains were designed and synthesized via palladium-catalyzed dehalogenative polycondensation using hexamethylditin as the condensation reagent. Their photophysical properties and device performances for organic field-effect transistors and organic solar cells were systematically studied. Replacing lateral alkyl-thienyl substituents with alkylthio-thienyl ones led to better photoabsorption properties and a deeper-lying HOMO energy level of the resulting NDT homopolymers. The alkylthio-thienyl-functionalized NDT homopolymer showed a higher hole mobility and superior photovoltaic properties compared with the alkyl-thienyl homolog.

Original languageEnglish
Pages (from-to)729-734
Number of pages6
JournalPolymer Journal
Volume49
Issue number10
DOIs
Publication statusPublished - Oct 1 2017

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Materials Chemistry

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