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Title:The role of charge transfer at reduced graphene oxide/organic semiconductor interface on the charge transport properties
Authors:ID Bratina, Gvido, ung (Author)
ID Pavlica, Egon, ung (Author)
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Language:English
Work type:Not categorized
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:The effect of 1-pyrenesulfonicacid sodium salt (1-PSA), tetracyanoethylene (TCNE) and tetrafluoro- tetracyanoquinodimethane (F4-TCNQ) on charge transport properties of reduced graphene oxide (RGO) is examined by measuring the transfer characteristics of field-effect transistors and co-planar time-of-flight photocurrent technique. Evidence of p-type doping and a reduction of mobility of electrons in RGO upon deposition of these materials is observed. Time-resolved photocurrent measurements show a reduction in elec- tron mobility even at submonolayer coverage of these materials. The variation of transit time with different coverages reveals that electron mobility decreases with increasing the surface coverage of 1-PSA, TCNE and F4- TCNQ to a certain extent, while at higher coverage the electron mobility is slightly recovered. All three molecules show the same trend in charge carrier mobility variation with coverage, but with different magnitude. Among all three molecules, 1-PSA acts as weak electron acceptor compared to TCNE and F4-TCNQ. The additional fluorine moieties in F4-TCNQ provides excellent electron withdrawing capability compared to TCNE. The experimental results are consistent with the density functional theory calculations.
Keywords:organic semiconductors, reduced graphene oxide, time-resolved photocurrent measurements, organic thin film transistors
Year of publishing:2019
Number of pages:7
Numbering:75
PID:20.500.12556/RUNG-4822-214af2dc-e387-b6f8-3589-05c705795d41 New window
COBISS.SI-ID:5473275 New window
DOI:10.1016/j.orgel.2019.105499 New window
NUK URN:URN:SI:UNG:REP:UFISCPAF
Publication date in RUNG:28.10.2019
Views:5366
Downloads:1
Metadata:XML DC-XML DC-RDF
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BRATINA, Gvido and PAVLICA, Egon, 2019, The role of charge transfer at reduced graphene oxide/organic semiconductor interface on the charge transport properties. Organic Electronics [online]. 2019. Vol. 75. [Accessed 8 April 2025]. DOI 10.1016/j.orgel.2019.105499. Retrieved from: https://repozitorij.ung.si/IzpisGradiva.php?lang=eng&id=4822
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Record is a part of a journal

Title:Organic Electronics
Shortened title:org. el.
Year of publishing:2019

Document is financed by a project

Funder:ARRS - Slovenian Research Agency
Project number:P1-0051

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:28.10.2019

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