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The Effect of Oxygen on the Photoconductivity of C60 Film: Action Spectrum and Temperature-Dependence

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Authors
Lee, Changhee; Yu, G.; Pakbaz, K.; Moses, D.; Srdanov, V. I.
Issue Date
1994
Publisher
Taylor & Francis
Citation
Mol. Cryst. Liq. Cryst. 256, 769
Abstract
Abstract
We report the effect of oxygen on the action spectrum of the steady-state photoconductivity (PC) of C60 film and its temperature dependence. The steady-state PC decreases more than 4 orders of magnitude upon exposure to oxygen; the PC decreases faster below ω≊2.3 eV. The low-temperature PC spectrum of the oxygen-free C60 is similar to the high-temperature PC spectrum of C60 exposed to oxygen. The steady-state PC exhibits a peak at T≊240 K in the oxygen-free C60, which disappears in C60 exposed to oxygen. The results indicate that the oxygen in C60 film acts as an efficient deep trap for photoexcited carriers and reduces the structural order.
ISSN
1542-1406
Language
English
URI
https://hdl.handle.net/10371/13736
DOI
https://doi.org/10.1080/10587259408039323
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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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