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Hopping conductivity and polarization effects in a fullerene derivative salt

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10.1021/jp503298e
 
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hdl:2117/24430

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Macovez, RobertoMés informacióMés informacióMés informació
Zachariah, Manesh
Romanini, MichelaMés informacióMés informacióMés informació
Zygouri, Panagiota
Gournis, Dimitrios
Tamarit Mur, José LuisMés informacióMés informacióMés informació
Document typeArticle
Defense date2014-06-12
Rights accessRestricted access - publisher's policy
Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain
Abstract
Impedance spectroscopy is employed to probe the frequency-dependent conductivity and dielectric response of the C60O24Na 24 fulleride. The conduction properties of this organic material match the so-called universal behavior of the ac conductivity in disordered media [Dyre, J. C.; Schroder, T. B. Rev. Mod. Phys. 2000, 72, 873-892]. In the whole temperature range studied, electrical conduction is due to intermolecular hopping processes of electronic charge carriers, characterized by an effective activation energy ranging between 0.7 eV at room temperature and 0.9 eV at 475 K. A single dielectric loss feature is observed, associated with the hopping of charge carriers surrounded by a polarization cloud. The polarizability of the material is mainly due to the distortion of the ionic O-Na bonds of the fullerene derivative, which are tight enough that no ionic contribution to the conductivity is observed up to the highest temperature probed (550 K). © 2014 American Chemical Society.
CitationMacovez, R. [et al.]. Hopping conductivity and polarization effects in a fullerene derivative salt. "The journal of physical chemistry. Part C, nanomaterials and interfaces", 12 Juny 2014, vol. 118, núm. 23, p. 12170-12175. 
URIhttp://hdl.handle.net/2117/24430
DOI10.1021/jp503298e
ISSN1932-7447
Publisher versionhttp://pubs.acs.org/doi/abs/10.1021/jp503298e
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  • GCM - Grup de Caracterització de Materials - Articles de revista [332]
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