TITLE

LiF/Al cathodes and the effect of LiF thickness on the device characteristics and built-in potential of polymer light-emitting diodes

AUTHOR(S)
Brown, T. M.; Brown, T.M.; Friend, R. H.; Friend, R.H.; Millard, I. S.; Millard, I.S.; Lacey, D. J.; Lacey, D.J.; Burroughes, J. H.; Burroughes, J.H.; Cacialli, F.
PUB. DATE
November 2000
SOURCE
Applied Physics Letters;11/6/2000, Vol. 77 Issue 19
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report the characteristics of a series of polymer light-emitting diodes, fabricated with LiF/Al cathodes and differing only by the thickness of the LiF interlayer (0 nm≤d≤11 nm). Electroabsorption studies of the internal electrostatic potential give direct evidence of a sizable reduction of the cathodic barrier height brought about by the LiF films. These results also correlate with photoemission experiments [S. E. Shaheen, G. E. Jabbour, M. M. Morrell, Y. Kawabe, B. Kippelen, N. Peyghambarian, M. F. Nabor, R. Schlaf, E. A. Mash, and N. R. Armstrong, J. Appl. Phys. 84, 2324 (1998)] and with the electroluminescence performance of the diodes. © 2000 American Institute of Physics.
ACCESSION #
4413219

 

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