The nature and role of trap states in a dendrimer-based organic field-effect transistor explosive sensor

Abstract

Articles you may be interested inInfluence of the carrier density in disordered organics with Gaussian density of states on organic field-effect transistors

Improving the selectivity to polar vapors of OFET-based sensors by using the transfer characteristics hysteresis response

“…Gu and Kim studied the hysteresis in pentacenebased OFETs during exposure to moisture and reported an increase due to moisture-induced trapping [19,20]. Tang reported a not completely reversible increase of the hysteresis in dendrimer-based OFETs [12]. However, to the best of our knowledge, a systematic investigation about the application of the hysteresis as a parameter for the detection of vapors with OFET-based sensors has not yet been reported.…”

“…The sensitivity of OS to gases, however, has been less investigated, though inexpensive large-scale production of gas sensors is expected to enable new applications in environmental monitoring, food spoilage detection and health industry. Solution processable organic semiconductors are promising candidates as they have been shown to exhibit fast and reproducible responses at room temperature [3] and respond to various analyte gases, ranging from volatile organic compounds [4,5] over airborne pollutants as NO 2 [6] and hazardous gases like ammonia [7][8][9] to explosives, which require an utterly weak detection limit [10][11][12][13]. This large number of detectable gases enables various applications for OS in gas sensors on one hand, but challenges the selectivity of the devices, on the other hand.…”