Visible Light Emission from Semiconducting Polymer Diodes

Author Info

David Braun, University of California at Santa BarbaraFollow
A. J. Heeger, University of California at Santa Barbara

Recommended Citation

Postprint version. Published in Applied Physics Letters, Volume 58, Issue 18, May 6, 1991, pages 1982-1984.

NOTE: At the time of publication, the author David Braun was not yet affiliated with Cal Poly.

The definitive version is available at https://doi.org/10.1063/1.105039.

Abstract

We report visible light emission from Shottky diodes made from semiconducting polymers, confirming the discovery by the Cambridge group [Nature 347, 539 (1990)]. Our results demonstrate that light-emitting diodes can be fabricated by casting the polymer film from solution with no subsequent processing or heat treatment required. Electrical characterization reveals diode behavior with rectification ratios greater than 104. We propose that tunneling of electrons from the recitifying metal contact into the gap states of the positive polaron majority carriers dominates current flow and provides the mechanism for light emission.

Disciplines

Electrical and Computer Engineering

Copyright

1991 American Institute of Physics.

Publisher statement

This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters