Single crystal field-effect transistors containing a pentacene analogue and their application in ethanol vapor detection

Abstract

Organic field-effect transistors (OFETs) have attracted attention in the field of organic electronics. The conducting channel of OFETs is highly sensitive to out stimulus, so OFETs can be used as ultrasensitive sensors and actuators. Here, a new kind of OFET containing micro- and nanocrystals of a pentacene analogue is reported. The OFET exhibited a mobility of 0.8 cm 2 V -1 s -1 and an on/off ratio of 1.7 × 10 7. Moreover, it displayed high sensitivity, selectivity, and reproducibility in the detection of ethanol gas, indicating its great potential as a sensor for ethanol gas. © 2012 American Institute of Physics.