Abstract
The electron transport properties of an air-exposed one-dimensional (1D) uneven peanutshaped C60 polymer film were investigated by examining the temperature dependence (30–350K) of the current–voltage (I–V) characteristics under ultrahigh vacuum conditions. Arrhenius plots of the resistance as a function of temperature showed two different electron conduction mechanisms. At temperatures above 140K, it was found that electrons are conducted via a thermal excitation hopping mechanism, and the activation energy changed discontinuously from 124 to 99meV at ca. 190K because of a change in the 1D polymer chain–chain interactions. On the other hand, at temperatures below 100K, the electron conduction behavior is consistent with a 2D variable-range hopping mechanism.
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