Improvement of optical properties and redox stability of poly(3,4-ethylenedioxythiophene)

Date

2018-02-01

Author

Ertan, Salih
CİHANER, ATİLLA

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In order to improve the optical properties and redox stability of poly(3,4-ethylenedioxythiophene) (PEDOT) without changing its electrochemical and electrochromic behaviour, it was supported with alkyl-substituted polyhedral oligomeric silsesquioxane (POSS) cage. The corresponding copolymers were obtained electrochemically via potentiostatic or potentiodynamic methods and compared to the parent homopolymers. Electrochemical polymerization of EDOT and POSS containing EDOT called EDOT-POSS in various monomer feed ratios was performed in an electrolyte solution of 0.1 M TBAPF(6) dissolved in a mixture of dichloromethane and acetonitrile (1/3: v/v). Just as PEDOT, the copolymers represented the similar band gap (1.61 eV), redox and electrochromic behaviors. On the other hand, when compared to the parent PEDOT, the presence of POSS cages in the copolymer backbone improved the redox stability and optical properties of PEDOT such as higher percent transmittance change (65% at 621 nm), higher transparency at oxidized state, lower switching time (similar to 1.0 s) and higher coloration efficiency (463 cm(2)/C for 95% switching) as well as higher electrochemical stability (86% of its electroactivity retains after 1750 cycles under ambient conditions).

Subject Keywords

Electropolymerization, Electrochromism, EDOT, Polyhedral oligomeric silsesquioxane, POSS

URI

https://hdl.handle.net/11511/65432

Journal

DYES AND PIGMENTS

DOI

https://doi.org/10.1016/j.dyepig.2017.10.032

Collections

Graduate School of Natural and Applied Sciences, Article

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Citation Formats

S. Ertan and A. CİHANER, “Improvement of optical properties and redox stability of poly(3,4-ethylenedioxythiophene),” DYES AND PIGMENTS, pp. 437–443, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/65432.