Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/15615
Title: Hysteresis-free DC conduction in zinc oxide films with a conducting polymer counter electrode
Authors: Paul, S
Harris, PG
Sharma, AK
Ray, AK
Keywords: Conducting polymer;Schottky diode;thermionic emission;Space charge limited conduction;grain boundary;electrode effect.
Issue Date: 2017
Citation: Journal of Materials Science: Materials in Electronics, 2017, https://doi.org/10.1007/s10854-017-8208-4
Abstract: A conducting polymer, namely poly (3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) has been employed as an alternative metal counter electrode to study steady state charge conduction through a spin-coated 5.2 µm thick ZnO film in a sandwich structure on a fluorine doped tin oxide (FTO) coated glass substrate. The room temperature current-voltage characteristics exhibit rectifying behaviour without hysteresis as the bias voltage is cycled between ±10V for varying voltage sweep rate from 100mV/s to 1000mV/s. Thermionic emission is believed to be the dominant conduction mechanism at forward bias voltage V ≤ 2.5V whereas the space charge limited current conduction becomes effective in a higher voltage region V>2.5V. The barrier height (b), ideality factor (n) and series resistance (Rs) are found to be strongly temperature dependent parameters showing the increase of ϕ_band simultaneous decreases of n and Rs within the range of 218K-298K. The behaviour of the temperature dependent charge carrier mobility in the higher voltage region has also been discussed. The use of PEDOT: PSS is quite promising as an alternative to metal electrodes in semiconductor devices.
URI: http://bura.brunel.ac.uk/handle/2438/15615
DOI: http://dx.doi.org/10.1007/s10854-017-8208-4
ISSN: 1573-482X
Appears in Collections:Dept of Electronic and Computer Engineering Research Papers

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