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Structural origin of the mobility enhancement in a pentacene thin-film transistor with a photo-crosslinking insulator
Cited 29 time in
Web of Science
Cited 29 time in Scopus
- Authors
- Issue Date
- 2007
- Publisher
- American Institute of Physics
- Citation
- J. Appl. Phys. 102, 063508
- Abstract
- We present the underlying mechanism for the mobility enhancement in a pentacene thin-film
transistor TFT with a photocrosslinking polymeric insulator, poly vinyl cinnamate PVCi .
Experimental results for the optical anisotropy, x-ray diffraction, and microscopic layer-by-layer
coverage of the pentacene film on the photocrosslinked PVCi layer, exposed to a linearly polarized
ultraviolet LPUV light, clearly demonstrate the importance of the structural packing of pentacene
grains rather than the directional alignment of the pentacene molecules for the mobility
enhancement. The packing density of pentacene grains is directly related to the number of
photocrosslinking sites of the PVCi insulator produced by the LPUV. It is found that the mobility
in the pentacene TFT is linearly proportional to the number of photocrosslinked sites of the PVCi
insulator serving as interaction sites for the layer-by-layer coverage of the pentacene molecules with
no preferred orientation.
- ISSN
- 0021-8979
- Language
- English
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