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Tris(8-hydroxyquinoline) aluminum (Alq 3 ), used as light-emitting layer in electroluminescent (EL) devices, has been synthesized. The thin films have been deposited by thermal evaporation on quartz and silicon substrates. The optical constants of Alq 3 films have been determined using spectroscopic ellipsometry (SE) over a wide spectral range. The influence of light exposure on the...
We report on the spectroscopic ellipsometry (SE) characterization and modeling of the light and environmental induced degradation of Poly(p-phenylenevinylene) (PPV) prepared by xanthate precursor route. We find a decrease in the refractive index as well as absorption coefficients after exposure to light in air ambient. Further, a decrease in film density and increase in film thickness is also observed...
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