Multicolor and fast electrochromism of nanoporous NiO/poly(3,4-ethylenedioxythiophene) composite thin film

• Published in: Electrochemistry communications Vol. 11; no. 3; pp. 702 - 705
• Main Authors: Xia, X.H., Tu, J.P., Zhang, J., Huang, X.H., Wang, X.L., Zhang, W.K., Huang, H.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01.03.2009; Amsterdam Elsevier; New York, NY
• Subjects: Chemistry; Electrochemistry; Electrochromism; Exact sciences and technology; General and physical chemistry; Miscellaneous (electroosmosis, electrophoresis, electrochromism, electrocrystallization, ...); NiO; Poly(3,4-ethylenedioxythiophene); Porous film; Electrochromism; NiO; Poly(3,4-ethylenedioxythiophene); Porous film; Scanning electron microscopy; Nanoporous materials; SAED; Electrochemical polymerization; Composite material; Thin film; Surface structure; Conducting polymers; Transmission electron microscopy; Thiophene derivative polymer; Optical transmission; Morphology; Chemical deposition; Chronoamperometry; Electrochemical reaction
• ISSN: 1388-2481; 1873-1902
• DOI: 10.1016/j.elecom.2009.01.017

We report a nanoporous NiO/poly(3,4-ethylenedioxythiophene) (PEDOT) composite film using a highly porous NiO film as a template by the combination of chemical bath deposition and electro-polymerization methods. The as-prepared NiO/PEDOT composite film has an interconnecting reticular morphology with nanometer sized pores ranging from 20–150 nm. The NiO/PEDOT composite film exhibits multicolor electrochromism with reversible color changes from purple to light blue brown and presents a transmittance variation of 31% at 600 nm. Fast switching speed is achieved in this composite film, and the response time for oxidation and reduction is 500 and 600 ms, respectively.