Abstract
We present a photometric method to determine the anisotropic optical constants of several aligned polyfluorene films. These polymers exhibit liquid crystal characteristic under heat treatment and polymer chains are preferentially in-plane oriented on a rubbed alignment layer. A self-consistent dispersion formula of Forouhi–Bloomer model is introduced to fit the measured polarized reflectance and transmittance curves by a global optimization algorithm. The very good agreements between the experimental and theoretical spectra allow us to shed light on the parallel and perpendicular components of optical constant. On this basis, light-emitting devices are fabricated using the anisotropic active films. The measured polarized electroluminescence spectra confirm the optical birefringence.
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