TITLE

Optical properties of single carrier polymer diodes under high electrical injection

AUTHOR(S)
Campbell, I. H.; Smith, D. L.; Neef, C. J.; Ferraris, J. P.
PUB. DATE
January 2001
SOURCE
Applied Physics Letters;1/15/2001, Vol. 78 Issue 3, p270
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We present measurements of the modulation of the near absorption edge optical properties of single carrier diodes made from a soluble poly(p-phenylene vinylene) derivative. Pulsed electrical excitation was used to acquire the optical characteristics for average injected charge densities up to 10[sup 18] cm[sup -3]. For injected carrier densities below 5x10[sup 17] cm[sup -3], the modulation of the optical properties are dominated by electroabsorption effects; at higher densities, the effects of the injected charge predominate. We find that there is no significant absorption by the injected charge below the optical absorption threshold and that there is substantial bleaching of the lowest energy optical transitions at high carrier density. These results imply that charge carrier absorption in this polymer does not limit the performance of organic light-emitting diodes and diode lasers. © 2001 American Institute of Physics.
ACCESSION #
4710765

 

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