Electronic carrier transport and photogeneration in buckminsterfullerene films

Information concerning electronic carrier transport and photogeneration in films of undoped C60/70 has been obtained from photoinduced xerographic discharge curves in sublimed films up to 40 μm in thickness. The results, using strongly absorbed light, unambiguously reveal that the electron range, μτ...

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Bibliographic Details
Published in:Applied physics letters 1992-10, Vol.61 (15), p.1829-1831
Main Authors: MORT, J, MACHONKIN, M, ZIOLO, R, CHEN, I
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Conductivity of specific materials
Electronic transport in condensed matter
Exact sciences and technology
Physics
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Summary:Information concerning electronic carrier transport and photogeneration in films of undoped C60/70 has been obtained from photoinduced xerographic discharge curves in sublimed films up to 40 μm in thickness. The results, using strongly absorbed light, unambiguously reveal that the electron range, μτ, where μ is the electron drift mobility and τ the deep trapping lifetime, is ∼10−7 cm2/V. By contrast, a barely detectable discharge is observed to be associated with holes. The photogeneration efficiency for electrons is field dependent with a value at 4000 Å of 5×10−2 at a field of 2×105 V/cm. These results are discussed in a context where both charge photogeneration and transport in undoped C60/70 involve localized electronic states.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.108388