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Title:Enhancement of Charge Transport in Polythiophene Semiconducting Polymer by Blending with Graphene Nanoparticles
Authors:ID Pavlica, Egon, Univerza v Novi Gorici (Author)
ID Bratina, Gvido, Univerza v Novi Gorici (Author), et al.
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Language:English
Work type:Not categorized
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:This paper describes a study on the charge transport in a composite of liquid‐exfoliated graphene nanoparticles (GNPs) and a polythiophene semiconducting polymer. While the former component is highly conducting, although it consists of isolated nanostructures, the latter offers an efficient charge transport path between the individual GNPs within the film, overall yielding enhanced charge transport properties of the resulting bi‐component system. The electrical characteristics of the composite layers were investigated by means of measurements of time‐of‐flight photoconductivity and transconductance in field‐effect transistors. In order to analyze both phenomena separately, charge density and charge mobility contributions to the conductivity were singled out. With the increasing GNP concentration, the charge mobility was found to increase, thereby reducing the time spent by the carriers on the polymer chains. In addition, for GNP loading above 0.2 % (wt.), an increase of free charge density was observed that highlights an additional key role played by doping. Variable‐range hopping model of a mixed two‐ and three‐dimensional transport is explained using temperature dependence of mobility and free charge density. The temperature variation of free charge density was related to the electron transfer from polythiophene to GNP, with an energy barrier of 24 meV.
Keywords:grafen, polimeri, transport električnega naboja, časovno odvisna fotoprevodnost
Publication version:Version of Record
Year of publishing:2019
Number of pages:10
Numbering:2019
PID:20.500.12556/RUNG-4952 New window
COBISS.SI-ID:5439739 New window
DOI:10.1002/cplu.201900219 New window
NUK URN:URN:SI:UNG:REP:ESOMKZ1A
Publication date in RUNG:23.08.2019
Views:4256
Downloads:0
Metadata:XML DC-XML DC-RDF
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PAVLICA, Egon and BRATINA, Gvido, 2019, Enhancement of Charge Transport in Polythiophene Semiconducting Polymer by Blending with Graphene Nanoparticles. ChemPlusChem [online]. 2019. Vol. 2019. [Accessed 24 April 2025]. DOI 10.1002/cplu.201900219. Retrieved from: https://repozitorij.ung.si/IzpisGradiva.php?lang=eng&id=4704
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Record is a part of a journal

Title:ChemPlusChem
Year of publishing:2019

Document is financed by a project

Funder:ARRS - Slovenian Research Agency
Project number:P1-0055

Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:23.08.2019

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