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Proceedings Paper

Injection, transport, and recombination in organic light-emitting diodes
Author(s): J. Campbell Scott; George G. Malliaras; Jesse R. Salem; Phillip J. Brock; L. Bozano; Sue A. Carter
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Paper Abstract

Efficient conversion of electrical to optical energy in organic light-emitting diodes (OLEDs) depends on balancing the flux of holes injected at the anode with that of electrons at the cathode. In this paper, we discuss several concepts related to optimizing the power efficiency of OLEDs, and put them in the context of analytic and numerical models for OLED operation. A simple argument is used to relate the charge injection rate from each electrode to measurable properties of the organic layer, deriving he equivalent of the Richardson-Dushman equation for the metal- organic interface. We discuss the role of charge density in dictating the importance of both space charge effects and recombination. These ideas are illustrated with experimental data form device structures which exemplify the various types of behavior predicted.

Paper Details

Date Published: 16 December 1998
PDF: 12 pages
Proc. SPIE 3476, Organic Light-Emitting Materials and Devices II, (16 December 1998); doi: 10.1117/12.332604
Show Author Affiliations
J. Campbell Scott, IBM Almaden Research Ctr. and Ctr. on Polymer Interfaces and Macromolecular Assemblies (United States)
George G. Malliaras, IBM Almaden Research Ctr. and Ctr. for Polymer Interfaces and Macromolecular Assemblies (United States)
Jesse R. Salem, IBM Almaden Research Ctr. (United States)
Phillip J. Brock, IBM Almaden Research Ctr. (United States)
L. Bozano, Univ. of California/Santa Cruz (United States)
Sue A. Carter, Univ. of California/Santa Cruz and Ctr. on Polymer Interfaces and Macromolecular Assemblie (United States)


Published in SPIE Proceedings Vol. 3476:
Organic Light-Emitting Materials and Devices II
Zakya H. Kafafi, Editor(s)

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