Journal
OPTICAL MATERIALS
Volume 108, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.optmat.2020.110435
Keywords
PEDOT; PSS thin films; Optical dielectric properties; Electrochemical; Visible spectrum; Variable angle ellipsometry spectrometer
Categories
Funding
- Jiangsu key R D programs [BE2018006-3]
- National Key Research and Development Program of China [2016YFA0301200]
- Key Research and Development Program of Shandong Province [2017GGX10111]
- Natural Science Foundation of Shandong Province [ZR2018MFO29]
- Shenzhen Projects of Science and Technology [JCYJ 20170818101939090]
- Fundamental Research Funds of Shandong University [2016WLJH44]
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Poly (3,4-ethylene dioxythiophene) polystyrene sulfonate (PEDOT:PSS) exhibits attractive optical tunability via electrochemical redox doping under applied voltages. Here, the influence of applied voltage on the optical parameters of PEDOT:PSS thin films was systemically investigated. The PEDOT:PSS film was prepared by the spincoating method. A well-defined reduction degree from 0 to 100% was set in a Na+ electrolyte by using electrochemical analysis. The biaxial anisotropy optical complex refractive index of PEDOT:PSS thin films at different reduction degrees were determined in the entire visible spectrum by using the variable angle ellipsometry spectrometer combined with the Drude-Lorentz model. The results show that both the refractive index and the extinction coefficient increase with the increase of the reduction degree. This implies potential applications for PEDOT:PSS films on electrically controlling devices.
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