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Synlett 2011(15): 2151-2156  
DOI: 10.1055/s-0030-1261191
LETTER
© Georg Thieme Verlag Stuttgart ˙ New York

First Tetrabutylanthradithiophene (TBADT) Derivatives for Solution-Processed Thin-Film Transistors

Peng-Yi Huanga, Choongik Kim*b, Ming-Chou Chen*a
a Department of Chemistry, National Central University, Jhong-Li, Taiwan 32054, P. R. of China
e-Mail: mcchen@ncu.edu.tw;
b Department of Chemical and Biomolecular Engineering, Sogang University, 1 Shinsoo-Dong, Mapo-Gu, Seoul 121-742, Korea
e-Mail: choongik@sogang.ac.kr;
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Publication History

Received 30 April 2011
Publication Date:
24 August 2011 (online)

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Abstract

Three new solution-processable tetrabutylanthradithiophene (TBADT)-based organic semiconductors bearing two phenylethynyl, thiophen-2-ylethynyl, and thieno[3,2-b]thiophen-5-ylethynyl substituents have been synthesized and their thermal, optical, and electrochemical properties have been characterized. Preliminary tests of these compounds via drop-casting for thin-film transistors showed p-channel TFT transport with hole mobilities as high as 1.510-³ cm²/Vs and with a current on/off ratio of 104.

Key words

organic semiconductor - organic thin-film transistor - anthradithiophene - solution process - pentacene

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11

Since three new TBADT derivatives are very soluble in common solvents, no crystal structures were obtained. Thus, the elucidation of interrelationships between molecular structure and the characterization of organic thin-film transistors are not available so far.

22

The solubility of TBADT derivatives was ca. 20 (for 3)
to 40 (for 1 and 2) mg/mL in CHCl3.