Optical determination of chain orientation in electroluminescent polymer films

We report polarized optical transmission and reflection measurements which are used to determine the orientation of polymer chains in spin-cast thin films of soluble, electroluminescent polymers. We find that the polymer chains lie primarily in the plane of the film. This result has three important...

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Bibliographic Details
Published in:Applied physics letters 1995-03, Vol.66 (10), p.1175-1177
Main Authors: McBranch, D., Campbell, I. H., Smith, D. L., Ferraris, J. P.
Format: Article
Language:English
Subjects:
DEPOSITION
ELECTROLUMINESCENCE
LIGHT TRANSMISSION
LUMINESCENCE
MATERIALS SCIENCE
MOLECULAR STRUCTURE
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
POLYMERS
REFLECTIVITY
SPIN-ON COATING
SURFACE COATING
SURFACE PROPERTIES 360606 > Other Materials-- Physical Properties-- (1992-)
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Summary:We report polarized optical transmission and reflection measurements which are used to determine the orientation of polymer chains in spin-cast thin films of soluble, electroluminescent polymers. We find that the polymer chains lie primarily in the plane of the film. This result has three important implications for polymer light emitting diodes: the electroluminescence is preferentially emitted propagating perpendicular to the polymer film; the relevant dielectric and electrical transport properties are those perpendicular to the polymer chains; and large area, uniform devices can be produced by spin casting.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.113848