Conduction mechanisms in undoped thin films of C60 and C60/70

Jari Paloheimo, Heikki Isotalo, Johann Kastner, Hans Kuzmany

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54 Citations (Scopus)


Undoped thin films of C60 and C60/70 mixture have been electrically and optically characterized over a wide temperature range T=10…475 K. In this paper the results of the field-effect conductance, conductivity, thermoelectric power, thermoabsorption and electroabsorption measurements will be presented. The transittor studies gave an n-type behaviour, and the thermally activated field-effect conductance obeyed the Meyer-Neldel rule. The conductivity showed an activated temperature dependence above 250 K, too, but turned into a nonactivated dependence below 200 K. The results may be explained by assuming a distribution of gap states. Furthermore, we have deposited and characterized Langmuir-Blodgett films of C60/70 and its heterostructures with poly(3-hexylthiophene).

Original languageEnglish
Pages (from-to)3185-3190
JournalSynthetic Metals
Issue number2-3
Publication statusPublished - 1993
MoE publication typeA1 Journal article-refereed


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