Screen-printable electrochromic polymer inks and ion gel electrolytes for the design of low-power, flexible electrochromic devices
Santiago, Sara (Universitat Autònoma de Barcelona. Departament de Química)
Aller Pellitero, Miguel (Institut de Microelectrònica de Barcelona)
del Campo, F. Javier (Institut de Microelectrònica de Barcelona)
Guirado López, Gonzalo (Universitat Autònoma de Barcelona. Departament de Química)

Data:	2019
Resum:	We have developed electrochromic inks and electrolyte materials to enable mass production of flexible electrochromic displays (ECDs) and other optoelectronic devices by screen printing. Here we present a new screen-printable ink incorporating electrochromic polymer, poly(3,4-propylenedioxythiophene)bis(ethylhexyloxy), referred to here as ECP-Magenta, and antimony-doped tin oxide (ATO/TiO) particles to facilitate electron transport. Their dispersion in a P(VDF-co-HFP) binder leads to the formation of a new electrochromic ink that is suitable for screen printing. This strategy opens the door to the preparation of similar electrochromic inks based on other organic or polymeric compounds. This approach is scalable and can applied to different fields. Ion gels (IGs) composed of P(VDF-co-HFP) and room temperature ionic liquids (RTILs) are promising solid-state electrolytes with high ionic conductivity, flexibility, elasticity and eco-friendliness. The electrochemical features of different ion gels were analyzed as a function of composition and nature of the ionic liquid. Hence, new formulations of IGs were developed, evaluated by Electrochemical Impedance Spectroscopy, Cyclic Voltammetry, before being incorporated into ECDs. The electrochromic performance of ECP-Magenta ink combined with the RTIL-based IG was evaluated by terms of spectroelectrochemistry showing that fully flexible ECD operating at voltages below 1 V can be screen-printed.
Ajuts:	Ministerio de Economía y Competitividad CTQ2015 65439-R Agència de Gestió d'Ajuts Universitaris i de Recerca PROD-0000114
Nota:	Altres ajuts: 2016 BBVA Foundation Grant for Researchers and Cultural Creators
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Electrochromism ; ECP-Magenta ; Iongel ; Screen-printing
Publicat a:	Electroanalysis, Vol. 31, Issue 9 (September 2019) , p. 1664-1671, ISSN 1521-4109

DOI: 10.1002/elan.201900154

Postprint 22 p, 2.1 MB

El registre apareix a les col·leccions:
Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > Grup d'Electroquímica, Fotoquímica i Reactivitat Orgànica (GEFRO)
Articles > Articles de recerca
Articles > Articles publicats