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Observation of the transition from tunneling to hopping carrier transport through single oligothiophene molecules

  • Ryo Yamada (a1), Hiroaki Kumazawa (a2), Shoji Tanaka (a3) and Hirokazu Tada (a4)

Abstract

Electrical conductance of single oligothiophene molecules with a length in the range from 2 to 9 nm was measured as a function of molecular length by a break junction method. The resistance of oligothiophenes increased exponentially from 5-mer to 14-mer while that of molecules longer than 17-mer showed linear dependence on their length. These results indicated that the carrier transport mechanism changed from tunneling to hopping around 14-mer of which the length is approximately 6 nm.

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Observation of the transition from tunneling to hopping carrier transport through single oligothiophene molecules

  • Ryo Yamada (a1), Hiroaki Kumazawa (a2), Shoji Tanaka (a3) and Hirokazu Tada (a4)

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