| Issue |
EPJ Web Conf.
Volume 162, 2017
International Conference on Applied Photonics and Electronics 2017 (InCAPE2017)
|
|
|---|---|---|
| Article Number | 01060 | |
| Number of page(s) | 5 | |
| DOI | https://doi.org/10.1051/epjconf/201716201060 | |
| Published online | 22 November 2017 | |
https://doi.org/10.1051/epjconf/201716201060
Frequency and voltage dependent electrical responses of poly(triarylamine) thin film-based organic Schottky diode
1
Faculty of Engineering, Universiti Malaysia Sabah, Jalan UMS, Kota Kinabalu, Sabah, 88400 Malaysia
2
Faculty of Engineering, Muroran Institute of Technology, 27-1 Mizumoto, Muroran, Hokkaido, 050-8585 Japan
* Corresponding author: khairul@ums.edu.my
Published online: 22 November 2017
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−1cm−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.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
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