Substituent effects on physical and photovoltaic properties of 5,6-difluorobenzo[ c ][1,2,5]thiadiazole-based D-A polymers: Toward a donor design for high performance polymer solar cells

Yan Wang, Xin Xin, Yong Lu, Ting Xiao, Xiaofeng Xu, Ni Zhao, Xiao Hu*, Beng ONG, Siu Choon Ng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)

Abstract

5,6-Difluorobenzo[c][1,2,5]thiadiazole (FBT)-based conjugated donor-acceptor (D-A) polymers with straight and branched side chains were synthesized via Stille-coupling copolymerization to study their physical, optoelectronic and photovoltaic properties. The results show that both the nature of pendant side chains and the electron acceptor strength of the acceptor moiety of D-A polymers have critical impacts on material and photovoltaic properties. Better π-π stacking of polymer backbones enabled by appropriate substituents such as fluorine atoms and branched alkyl chains leads to a reasonably high power conversion efficiency of over 6% when the polymer is utilized as a donor material with PC71BM as an active layer in bulk heterojunction solar cells.

Original languageEnglish
Pages (from-to)9587-9592
Number of pages6
JournalMacromolecules
Volume46
Issue number24
DOIs
Publication statusPublished - 23 Dec 2013

Scopus Subject Areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

Fingerprint

Dive into the research topics of 'Substituent effects on physical and photovoltaic properties of 5,6-difluorobenzo[ c ][1,2,5]thiadiazole-based D-A polymers: Toward a donor design for high performance polymer solar cells'. Together they form a unique fingerprint.

Cite this