Journal
APPLIED PHYSICS LETTERS
Volume 101, Issue 3, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4737173
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Funding
- National Natural Science Foundation of China [60707015, 61177028]
- Youth Scientific Research Foundation of Jilin province in China [20080173, 201115028]
- Scientific Frontier and Cross Disciplinary Innovation Project of Jilin University in China
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In this letter, the hysteresis mechanism of organic thin-film transistors (OTFTs) with polyvinyl alcohol (PVA) as gate dielectric is studied. By examining OTFTs with a blocking polymer layer between gate and PVA or between channel and PVA, we confirm that the origin of the hysteresis is caused by the holes injected from the gate and/or from the channel and trapped in the interface of pentacene/PVA and the PVA bulk. A method is proposed to reduce the hysteresis. As a result, a pentacene OTFT with free-hysteresis and high mobility of 1.8 cm(2)/Vs is achieved by a triple-layer polymer dielectric at low-operating voltages. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4737173]
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