Low-temperature phase transitions in a soluble oligoacene and their effect on device performance and stability
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506 (United States)
- Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina 27109 (United States)
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 = 205 K 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.
- OSTI ID:
- 22311351
- Journal Information:
- Applied Physics Letters, Vol. 105, Issue 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
Similar Records
Microstructural control of charge transport in organic blend thin-film transistors
Low-voltage polymer/small-molecule blend organic thin-film transistors and circuits fabricated via spray deposition
Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTAL STRUCTURE
ELECTRICAL PROPERTIES
FIELD EFFECT TRANSISTORS
MONOCRYSTALS
ORGANIC SEMICONDUCTORS
PHASE TRANSFORMATIONS
STABILITY
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0065-0273 K
THERMAL STRESSES
THIN FILMS
TRANSITION TEMPERATURE