Charge injection dynamics in organic multilayers

Liang-Bih Lin; Ralph H. Young; M. Gary Mason; Deniz E. Schildkraut; Samson A. Jenekhe; Paul M. Borsenberger

doi:10.1117/12.332608

16 December 1998 Charge injection dynamics in organic multilayers

Liang-Bih Lin, Ralph H. Young, M. Gary Mason, Deniz E. Schildkraut, Samson A. Jenekhe, Paul M. Borsenberger

Proceedings Volume 3476, Organic Light-Emitting Materials and Devices II; (1998) https://doi.org/10.1117/12.332608
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

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.

Citation Download Citation

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); https://doi.org/10.1117/12.332608

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