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Solid-state electrochromic devices with Nb2O5:Mo thin film and gelatin-based electrolyte |
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| Authors: | César O Avellaneda Diogo F Vieira Edson R Leite Michel A Aegerter |
| Affiliation: | a Leibniz-Institut für Neue Materialien gem. GmbH, Im Stadtwald Geb. D2 2, 66123 Saarbrücken, Germany b LIEC-Departamento de Química, Universidade Federal de São Carlos, C.P. 676, CEP 13565-905, São Carlos, SP, Brazil c Departamento de Físico-Química, Instituto de Química de São Carlos, Universidade de São Paulo, C.P. 780, CEP 13560-970, São Carlos, SP, Brazil |
| Abstract: | A gelatin-based electrolyte has been developed and characterized by impedance spectroscopy, X-ray diffraction, UV-vis-NIR spectroscopy and atomic force microscopy (AFM). The heat treatment temperature was found the key factor affecting its ionic conductivity that increases from 1.5 × 10−5 S/cm to 4.9 × 10−4 S/cm by heating from room temperature up to 80 °C. The temperature dependence of the ionic conductivity exhibits an Arrhenius behavior. EC-devices with the configuration K-glass/Nb2O5:Mo EC-layer/gelatin-based electrolyte/(CeO2)x(TiO2)1−x ion-storage (IS) layer/K-glass, have been assembled and characterized. They show a good long time cyclic stability, but the change of the optical density measured at 550 nm after 25 000 cycles was only 0.13. |
| Keywords: | Solid electrolyte Conductivity Gelatin Electrochromic device |
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