Humidity sensors based on pentacene thin-film transistors

Zhu, Zheng-Tao; Mason, Jeffrey T.; Dieckmann, Rüdiger; Malliaras, George G.
December 2002
Applied Physics Letters;12/9/2002, Vol. 81 Issue 24, p4643
Academic Journal
When a pentacene thin-film transistor is exposed to humidity, its saturation current decreases. This decrease was found to be reversible and can therefore be used to measure the amount of relative humidity in atmosphere. The sensitivity was found to depend on the thickness of the pentacene layer. The microscopic origin of the sensing mechanism is discussed.


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