Organic field-effect transistors fabricated with N,N′-substituted dialkyl-1,3,8,10-tetramethylquinacridone compounds

Zong-Xiang Xu; Hai-Feng Xiang; Roy, V. A. L.; Chui, Stephen Sin-Yin; Yue Wang; Lai, P. T.; Chi-Ming Che
September 2009
Applied Physics Letters;9/21/2009, Vol. 95 Issue 12, p123305
Academic Journal
A series of robust and inexpensive p-type organic semiconductors 1,3,8,10-tetramethyl quinacridone compounds was prepared. These quinacridone compounds bearing N,N′-disubstituted long N-alkyl chains self-organize into highly oriented crystalline films, leading to high performance organic thin film transistors with the best field-effect mobility, on/off ratio, and threshold voltage being 1.6×10-1 cm2 V-1 s-1, 1×104, and -17 V, respectively. The effects of methyl substituent and N-alkyl chain length of the quinacridone compounds together with the molecular packing on the field-effect mobility are discussed.


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