Two-Step Polarization Reversal Process in Pentacene/Poly(vinylidene fluoride--trifluoroethylene) Double-Layer Capacitor: Reduced Coercive Field
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概要
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The coercive field E_{\text{c}} of ferroelectric poly(vinylidene fluoride--trifluoroethylene) [P(VDF--TrFE)] has been studied by observing the displacement current due to polarization reversal. Unlike in a metal--insulator--metal device, the polarization reversal in a metal--insulator--semiconductor diode (pentacene as the semiconductor) is a two-step process. We used modified current--voltage measurements to intentionally avoid the second-step polarization reversal and observed a reduced E_{\text{c}}. The reduction of E_{\text{c}} is interpreted to be a result of the reduced local dipole-induced field, on the basis of the optical electric-field-induced second-harmonic generation measurements.
- 2012-02-25
著者
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Manaka Takaaki
Department Of Physical Electronics Graduate School Of Science And Engineering Tokyo Institute Of Tec
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Iwamoto Mitsumasa
Department Of Electrical And Electronic Engineering
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Taguchi Dai
Department Of Physical Electronics Tokyo Institute Of Technology
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Li Jun
Department Of Biochemistry Zhongshan School Of Medicine Sun Yat-sen University
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Li Jun
Department of Physical Electronics, Tokyo Institute of Technology, Meguro, Tokyo 152-8552, Japan
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