High thermal stability solution-processable narrow-band gap molecular semiconductors

Xiaofeng Liu, Ben B.Y. Hsu, Yanming Sun, Cheng Kang Mai, Alan J. Heeger, Guillermo C. Bazan

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)


A series of narrow-band gap conjugated molecules with specific fluorine substitution patterns has been synthesized in order to study the effect of fluorination on bulk thermal stability. As the number of fluorine substituents on the backbone increase, one finds more thermally robust bulk structures both under inert and ambient conditions as well as an increase in phase transition temperatures in the solid state. When integrated into field-effect transistor devices, the molecule with the highest degree of fluorination shows a hole mobility of 0.15 cm2/V·s and a device thermal stability of >300 °C. Generally, the enhancement in thermal robustness of bulk organization and device performance correlates with the level of C-H for C-F substitution. These findings are relevant for the design of molecular semiconductors that can be introduced into optoelectronic devices to be operated under a wide range of conditions.

Original languageEnglish
Pages (from-to)16144-16147
Number of pages4
JournalJournal of the American Chemical Society
Issue number46
Publication statusPublished - 2014 Nov 19

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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