Optical constants of polyaniline/poly(methylmethacrylate) blend

In this work we have investigated the optical properties of thin film camphor sulfonic acid doped polyaniline/poly(methylmethacrylate) (PAni-CSA/PMMA) blend using spectroscopic ellipsometer. The optical constants for the chemically prepared PAni-CSA show amorphous-like characteristics, which can be...

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Bibliographic Details
Published in:Optics communications 2004-01, Vol.229 (1), p.263-270
Main Authors: Al-Attar, H.A, Telfah, A.Dh
Format: Article
Language:English
Subjects:
Composed polymer
Ellipsometry
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Optical materials
Optical properties
Optics
Organic conducting
Physics
Polymers and organics
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Summary:In this work we have investigated the optical properties of thin film camphor sulfonic acid doped polyaniline/poly(methylmethacrylate) (PAni-CSA/PMMA) blend using spectroscopic ellipsometer. The optical constants for the chemically prepared PAni-CSA show amorphous-like characteristics, which can be modeled using Cauchy parametric formula with linear absorption or Tauc-Lorentz formula. The optical constants of the (PAni-CSA/PMMA) blend film were obtained using Bruggeman effective medium approximation (EMA) formula. The results show that the refractive index of the blend system can be adjusted in the spectral range 300–550 nm by controlling the PAni-CSA percentage contained in the film. The blend film is transparent and the absorption coefficient varies linearly with the concentration of PAni-CSA. The system can be used as a adjustable optical constants buffer layer in the hole injection electrode for polymer light emitted diode (PLED) devices.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2003.10.018