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

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 cm^²/Vs and with a current on/off ratio of 10⁴.

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

References and Notes

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