Solid-state electrochromic devices based on poly(trimethylene carbonate) and lithium salts

• Autor(a) principal: Barbosa, P. C.
• Data de Publicação: 2008
• Outros Autores: Silva, Maria Manuela, Smith, Michael John, Gonçalves, A. I., Fortunato, E.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/1822/7750
• topic: Solid polymer electrolyte; Electrochromic materials; sputtering; Science & Technology

The application of solid polymer electrolytes as dual-function electrolyte/adhesive components in electrochromic devices and the preliminary characterization of the resulting prototype displays is described in this paper. An asymmetric device configuration, represented schematically as glass/ZnO:Ga2O3/WO3/polymer electrolyte/ZnO:Ga2O3/glass, was chosen. Electrolytes with compositions of n between 3 and 10, where n represents the molar ratio of poly(trimethylene carbonate), p(TMC), ((CO)OCH2CH2CH2O), units per guest lithium ion, were prepared by solvent casting. The electrochromic switching performance was characterized as a function of salt type and salt concentration. The average transmittance in the visible region of the spectrum was above 63% for all the bleached samples characterized. After coloration the structures assembled with both p(TMC)nLiClO4 and p(TMC)nLiBF4 presented an average transmittance in the visible wavelength region above 39%.