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Fukuda, Hisashi
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Publications (3/3 displayed)
- 2017Frequency and voltage dependent electrical responses of poly(triarylamine) thin film-based organic Schottky diodecitations
- 2013Effect of [6,6]-Phenyl-C 61 butyric acid methyl ester (PCBM) agglomerated nanostructure on device performance in organic thin-film transistorscitations
- 2011Fabrication of ZnO Thin-Film Transistors by Chemical Vapor Deposition Method using Zinc Acetate Solutioncitations
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article
Frequency and voltage dependent electrical responses of poly(triarylamine) thin film-based organic Schottky diode
Abstract
A metal-organic-metal (MOM) type Schottky diode based on poly (triarylamine) (PTAA) thin films has been fabricated by using the spin coating method. Investigation of the frequency dependent conductance-voltage (G-V-f ) and capacitance-voltage (C-V-f ) characteristics of the ITO/PTAA/Al MOM type diode were carried out in the frequency range from 12 Hz to 100 kHz using an LCR meter at room temperature. The frequency and bias voltage dependent electrical response were determined by admittance-based measured method in terms of an equivalent circuit model of the parallel combination of resistance and capacitance (RC circuit). Investigation revealed that the conductance is frequency and a bias voltage dependent in which conductance continuous increase as the increasing frequency, respectively. Meanwhile, the capacitance is dependent on frequency up to a certain value of frequency (100 Hz) but decreases at high frequency (1 – 10 kHz). The interface state density in the Schottky diode was determined from G-V and C-V characteristics. The interface state density has values almost constant of 2.8 x 1012 eV−1 cm−2 with slightly decrease by increasing frequencies. Consequently, both series resistance and interface trap density were found to decrease with increasing frequency. The frequency dependence of the electrical responses is attributed the distribution density of interface states that could follow the alternating current (AC) signal.