Synthesis of a perylenediimide-viologen dyad (PDI-2V) and its electrochromism in a layer-by-layer self-assembled multilayer film with PEDOT:PSS

• Published in: Journal of materials chemistry Vol. 22; no. 27; pp. 13558 - 13563
• Main Authors: Kim, Suk-ho, Shim, Nayoung, Lee, Hoosung, Moon, Bongjin
• Format: Journal Article
• Language: English
• Published: 01.01.2012
• Subjects: Adhesive strength; Charging; Color; Devices; Electrochromism; Electrodes; Molecular weight; Self-assembled multilayers
• ISSN: 0959-9428; 1364-5501
• DOI: 10.1039/c2jm31407j

A new electrochromic molecule, perylenediimide-viologen dyad ( PDI-2V ), was synthesized and used in the fabrication of layer-by-layer (LBL) self-assembled multilayer films with poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS). Since PDI-2V is a tetracationic organic molecule with high molecular weight, it showed strong electrostatic adhesion to negatively charged PEDOT:PSS. When the electrochromic behaviour of the resulting LBL film was investigated with a single type electrochromic device, the PDI-2V showed a three-stage color change from red to blue to violet under the reduction potential range. A dual type electrochromic device was also fabricated with P3HT spin-coated ITO as a counter electrode. This device exhibited a sharp color change between deep red and dark blue when the applied potential was switched from +2.0 V to −2.0 V. A new electrochromic molecule, perylenediimide-viologen dyad ( PDI-2V ), was synthesized and used in the fabrication of layer-by-layer (LBL) self-assembled multilayer films with poly(3,4-ethylenedioxy-thiophene)-poly(styrenesulfonate) (PEDOT:PSS).