Aqueous-Alcohol-Processable High-Mobility Semiconducting Copolymers with Engineered Oligo(ethylene glycol) Side Chains

Boseok Kang, Ziang Wu, Min Je Kim, Han Young Woo, Jeong Ho Cho

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


Replacement of toxic chlorinated solvents with eco- and human-friendly solvents is an important task for the successful implemention of next-generation polymer electronics technology. Herein, we designed and synthesized five aqueous-alcohol-processable conjugated copolymers by incorporating linear or branched oligo(ethylene glycol) side chains and systematically investigated their material and electronic properties. The resulting benzothiadiazole-based donor-acceptor alternating copolymers were well-soluble in both an ethanol/water mixed solvent and a chlorinated solvent, and their thin films showed distinct morphologies and crystalline characteristics that resulted from the self-assembling properties of the engineered side chains. Moreover, the copolymers showed excellent electrical characteristics with high hole mobilities of up to 0.1 cm2 V-1 s-1, which is among the highest values reported thus far for polymer field-effect transistors processed using truly eco- and human-friendly solvents without the use of any surfactants. These results clearly demonstrate the immense potential of branched oligo(ethylene glycol) side chains for application in green electronics.

Original languageEnglish
Pages (from-to)1111-1119
Number of pages9
JournalChemistry of Materials
Issue number3
Publication statusPublished - 2020 Feb 11

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry


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