Electrochromic behavior of dimethyl terephthalate in ionic liquids-based quasi-solid matrices
Naeem, Tehreema (Universitat Autònoma de Barcelona. Departament de Química)
Vilà, Neus (Universitat Autònoma de Barcelona. Departament de Química)
Hernando Campos, Jordi (Universitat Autònoma de Barcelona. Departament de Química)
Guirado, Gonzalo (Universitat Autònoma de Barcelona. Departament de Química)

Date:	2026
Abstract:	This study reports a solid-state electrochromic device (ECD) based on dimethylterephthalate (DMT), demonstrating high stability and low operating voltage on both rigid and flexible substrates. DMT molecules were incorporated into a poly(vinylidene fluoride- co -hexafluoropropylene) ionogel (IG) using ionic liquids as environmentally friendly electrolytes. Cyclic voltammetry and in-situ spectroelectrochemistry were employed to investigate the electrochromic mechanism in the DMT@IG system. An ECD with two electrodes was fabricated on ITO-coated glass, operating at a low potential difference of 2 V, with bleaching times of 2. 06 s, coloration times of 5. 92 s, an optical contrast of 21%, and a color efficiency of 147. 7 cm² C⁻¹. The device maintained stability for up to 30 cycles. Furthermore, a flexible three-electrode configuration with a DMT@IG membrane was designed, confirming DMT's potential as an advantageous material for low-voltage electrochromic and flexible display applications.
Grants:	Agencia Estatal de Investigación PID2022-141293OB-I00 Generalitat de Catalunya 2021/SGR-00064 Generalitat de Catalunya 2021/SGR-00052
Note:	Altres ajuts: acords transformatius de la UAB
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Electrochromic devices ; Ionogels ; Ionic liquids ; Dimethyl terephthalate
Published in:	Electrochimica Acta, Vol. 557 (May 2026) , art. 148464, ISSN 0013-4686

DOI: 10.1016/j.electacta.2026.148464

9 p, 4.9 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Group in Electrochemistry, Photochemistry and Organic Reactivity (GEFRO)
Articles > Research articles
Articles > Published articles