Influences of semiconductor morphology on the mechanical fatigue behavior of flexible organic electronics

The influence of crystalline morphology on the mechanical fatigue of organic semiconductors (OSCs) was investigated using 6,13-bis(triisopropylsilylethynyl)pentacene (TIPS-pentacene) as a crystalline OSC and poly(triarylamine) (PTAA) as an amorphous OSC. During cyclic bending, resistances of the OSC...

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Bibliographic Details
Published in:Applied physics letters 2013-12, Vol.103 (24)
Main Authors: Lee, Young-Joo, Uk Lee, Yong, Yeon, Han-Wool, Shin, Hae-A-Seul, Evans, Louise A., Joo, Young-Chang
Format: Article
Language:English
Subjects:
Applied physics
BENDING
Bending fatigue
Crack propagation
CRACKS
Crystal structure
Crystallinity
DAMAGE
Degradation
ELECTRICAL PROPERTIES
FATIGUE
Fatigue cracks
Fatigue failure
Fracture mechanics
MATERIALS SCIENCE
METALS
MORPHOLOGY
ORGANIC SEMICONDUCTORS
PENTACENE
STRESSES
Structural damage
Tips
Transmission lines
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Summary:The influence of crystalline morphology on the mechanical fatigue of organic semiconductors (OSCs) was investigated using 6,13-bis(triisopropylsilylethynyl)pentacene (TIPS-pentacene) as a crystalline OSC and poly(triarylamine) (PTAA) as an amorphous OSC. During cyclic bending, resistances of the OSCs were monitored using the transmission-line method on a metal-semiconductor-metal structure. The resistance of the TIPS-pentacene increased under fatigue damage in tensile-stress mode, but no such degradation was observed in the PTAA. Both OSCs were stable under compressive bending fatigue. The formation of intergranular cracks at the domain boundaries of the TIPS-pentacene was responsible for the degradation of its electrical properties under tensile bending fatigue.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4845995