Journal
APPLIED PHYSICS LETTERS
Volume 83, Issue 8, Pages 1644-1646Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1604193
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Degradation of organic thin-film field-effect transistors (OTFTs) with pentacene as the active material has been studied. It was found that the field-effect mobility of the device decreased by 30% and the on/off current ratio decreased to one fifth after the OTFTs had been stored in atmosphere for 500 h. Through surface morphology analysis by atomic force microscopy and absorption analysis by infrared spectroscopy, it was found that the adsorption of H2O on the pentacene layer was the main reason for the degradation. Remarkable improvement in the device performance was achieved by device encapsulation with UV curable resin. (C) 2003 American Institute of Physics.
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