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16 December 1998 Charge injection dynamics in organic multilayers
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We describe transient photocurrents across organic interfaces. Two well known hole transporting molecular solids are used in this study. The energetics are evaluated by electrochemical measurements in solution and photoelectron spectroscopy of solid films. Charge injection is complete and without apparent delay when favored energetically. When injection is energetically unfavorable, some carries are injected very rapidly, and the rest very slowly, relative to a time scale of a few microsecond(s) . This dichotomy may be connected with a tendency to hop along the interface repeatedly before crossing it. Roughness of the interface or mixing of the two materials there may exacerbate the delay of injection for carriers that make many such 'lateral' hops.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Liang-Bih Lin, Ralph H. Young, M. Gary Mason, Deniz E. Schildkraut, Samson A. Jenekhe, and Paul M. Borsenberger "Charge injection dynamics in organic multilayers", Proc. SPIE 3476, Organic Light-Emitting Materials and Devices II, (16 December 1998);

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