Electric field and grain size dependence of Meyer–Neldel energy in C60 films

Ullaha, Mujeeb, Pivrikas, A., Fishchuk, I.I., Kadashchuk, A., Stadler, P., Simbrunner, C., Sariciftci, N.S. and Sitter, H. (2011) Electric field and grain size dependence of Meyer–Neldel energy in C60 films. Synthetic Metals, 161 17-18: 1987-1990. doi:10.1016/j.synthmet.2011.07.008


Author Ullaha, Mujeeb
Pivrikas, A.
Fishchuk, I.I.
Kadashchuk, A.
Stadler, P.
Simbrunner, C.
Sariciftci, N.S.
Sitter, H.
Title Electric field and grain size dependence of Meyer–Neldel energy in C60 films
Formatted title
Electric field and grain size dependence of Meyer–Neldel energy in C60 films
Journal name Synthetic Metals   Check publisher's open access policy
ISSN 0379-6779
Publication date 2011-09
Sub-type Article (original research)
DOI 10.1016/j.synthmet.2011.07.008
Volume 161
Issue 17-18
Start page 1987
End page 1990
Total pages 4
Place of publication Lausanne, Switzerland
Publisher Elsevier
Collection year 2012
Language eng
Formatted abstract
Meyer–Neldel rule for charge carrier mobility measured in C60-based organic field-effect transistors (OFETs) at different applied source drain voltages and at different morphologies of semiconducting fullerene films was systematically studied. A decrease in the Meyer–Neldel energy EMN from 36 meV to 32 meV was observed with changing electric field in the channel. Concomitantly a decrease from 34 meV to 21 meV was observed too by increasing the grain size and the crystallinity of the active C60 layer in the device. These empiric findings are in agreement with the hopping-transport model for the temperature dependent charge carrier mobility in organic semiconductors with a Gaussian density of states (DOS). Experimental results along with theoretical descriptions are presented.
Keyword Organic field effect transistors
Charge carrier mobility
Meyer–Neldel rule
Charge transport
Film morphology
Grain size
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Chemistry and Molecular Biosciences
 
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Created: Thu, 20 Oct 2011, 10:57:33 EST by Almantas Pivrikas on behalf of School of Chemistry & Molecular Biosciences