Electric field and grain size dependence of Meyer-Neldel energy in C 60 films

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Meyer-Neldel rule for charge carrier mobility measured in C 60-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. © 2011 Elsevier B.V. All rights reserved.




Ullah, M., Pivrikas, A., Fishchuk, I. I., Kadashchuk, A., Stadler, P., Simbrunner, C., … Sitter, H. (2011). Electric field and grain size dependence of Meyer-Neldel energy in C 60 films. Synthetic Metals, 161(17–18), 1987–1990. https://doi.org/10.1016/j.synthmet.2011.07.008

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