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Transient and Steady-State Photoconductivity of a Solid C60 Film

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Authors
Lee, C. H.; Yu, G.; Moses, D.; Srdanov, V. I.; Wei, X.; Vardeny, Z. V.
Issue Date
1993-09-15
Publisher
The American Physical Society
Citation
Phys. Rev. B 48, 8506
Abstract
We report the experimental results of the subnanosecond time-resolved transient photoconductivity (PC) of solid C60 film at various photon energies, and the spectral response of the steady-state PC in the energy range between 1.5 and 4.5 eV. The initial fast transient PC response decays exponentially in the subnanosecond time regime, followed by a weak slower component. Decay time at ħω=2.0 eV is longer than that at ħω=2.6 and 2.9 eV. At ħω=2.0 eV, transient PC peak shows a superlinear intensity dependence, suggesting carrier generation via exciton-exciton collision ionization, consistent with the recent results of fast photoinduced absorption. However, the linear intensity dependence of the transient PC at ħω=2.6 and 2.9 eV and a sharp increase of the transient and steady-state PC response at ħω≊2.3 eV indicate direct photogeneration of free electrons and holes at ħω>2.3 eV.
ISSN
1098-0121
Language
English
URI
http://hdl.handle.net/10371/13605
DOI
https://doi.org/10.1103/PhysRevB.48.8506
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Electrical and Computer Engineering (전기·정보공학부)Journal Papers (저널논문_전기·정보공학부)
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