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High Mobility and Liquid Phase Processable Organic Semiconductors

Published online by Cambridge University Press:  10 February 2011

H. E. Katz,
J. Laquindanum and
A. J. Lovinger
H. E. Katz
Affiliation:
Bell Laboratories-Lucent Technologies, 600 Mountain Avenue, Murray Hill, NJ 07974
J. Laquindanum
Affiliation:
Bell Laboratories-Lucent Technologies, 600 Mountain Avenue, Murray Hill, NJ 07974
A. J. Lovinger
Affiliation:
Bell Laboratories-Lucent Technologies, 600 Mountain Avenue, Murray Hill, NJ 07974
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Abstract

New thiophene oligomers and fused ring compounds have been designed and synthesized with the aim of maximizing semiconductor mobility in thin film transistors (TFTs) while allowing for liquid phase processability. Thiophene hexamers with alkyl side chains of various lengths, some with an ether oxygen embedded in the chain, were synthesized, as were derivatives of the novel heterocycle anthradithiophene. Mobilities of the vaporphase-deposited films ranged from 0.01 cm2/Vs for the hexamers to 0.15 cm2/Vs for dihexylanthradithiophene. The latter is the highest mobility yet reported for a polycrystalline film. Cast films of some of these compounds from solution gave mobilities within factors of 2–10 of the corresponding values from gas-phase-deposited films.

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References

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