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Proceedings Paper

Polymer electroluminescent devices with zirconium carbide cathodes
Author(s): James R. Sheats; William A. Mackie; Samir Anz; Tienbao Xie
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Paper Abstract

The behavior of polymeric electroluminescent devices made using ZrC cathodes, a soluble phenylene vinylene polymer, and Au anodes is reported. ZrC is a highly air-stable metal with a work function of about 3.6 eV. Polycrystalline thin films can be formed on sapphire with electron beam evaporation and subsequent annealing at ca. 500 deg C. The devices exhibit a lower turn-on voltage than corresponding devices with Al cathodes, but very low efficiency; their lifetime is not longer than with other cathodes. The current-luminance-voltage-time characteristics suggest that the recombination zone is close to the cathode, that the metal is not exidized and efficiently quenches the excitons, and that the negative charge carriers are effectively trapped by the polymer.

Paper Details

Date Published: 1 December 1997
PDF: 9 pages
Proc. SPIE 3148, Organic Light-Emitting Materials and Devices, (1 December 1997); doi: 10.1117/12.295545
Show Author Affiliations
James R. Sheats, Hewlett-Packard Co. (United States)
William A. Mackie, Linfield College (United States)
Samir Anz, Hewlett-Packard Co. (United States)
Tienbao Xie, Linfield College (United States)

Published in SPIE Proceedings Vol. 3148:
Organic Light-Emitting Materials and Devices
Zakya H. Kafafi, Editor(s)

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