Low-temperature phase transitions in a soluble oligoacene and their effect on device performance and stability

J. W. Ward, K. P. Goetz, A. Obaid, M. M. Payne, P. J. Diemer, C. S. Day, J. E. Anthony, O. D. Jurchescu

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

The use of organic semiconductors in high-performance organic field-effect transistors requires a thorough understanding of the effects that processing conditions, thermal, and bias-stress history have on device operation. Here, we evaluate the temperature dependence of the electrical properties of transistors fabricated with 2,8-difluoro-5,11-bis(triethylsilylethynyl)anthradithiophene, a material that has attracted much attention recently due to its exceptional electrical properties. We have discovered a phase transition at T=205K and discuss its implications on device performance and stability. We examined the impact of this low-temperature phase transition on the thermodynamic, electrical, and structural properties of both single crystals and thin films of this material. Our results show that while the changes to the crystal structure are reversible, the induced thermal stress yields irreversible degradation of the devices.

Original languageEnglish
Article number083305
JournalApplied Physics Letters
Volume105
Issue number8
DOIs
StatePublished - Aug 25 2014

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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