Please use this identifier to cite or link to this item: doi:10.22028/D291-24193
Title: Synthesis of multicolor Nb2O5 coatings for electrochromic devices
Author(s): Pawlicka, Agnieszka
Atik, Mohamed
Aegerter, Michel A.
Language: English
Year of Publication: 1997
OPUS Source: Thin solid films. - 301. 1997, S. 236-241
SWD key words: Dünne Schicht
Differential scanning calorimetry
DDC notations: 500 Science
Publikation type: Journal Article
Abstract: Thin films of Nb2O5 were obtained by a sonocatalytic sol-gel method using chloroalkoxides as precursors. They were deposited using the dip-coating technique and calcined at different temperatures. Precipitates were characterized by X-ray diffraction, DSC, FTIR and the films by SEM. The films of Nb2O5 present a good electrochemical response under Li ions insertion. Depending on the treatment temperature, the films change their color from transparent to brown or blue. The efficiency of coloring was estimated to be 22 cm2 C-1 at 600 nm for a 300 nm thick film with a change in optical transmission from 80% to 15%. The cathodic and anodic charges exchanged at a velocity of 50 mV s-1 were about 15 mC cm-2 and the process is fully reversible. The values measured up to 100 cycles are constant, indicating good chemical stability of the films.
Link to this record: urn:nbn:de:bsz:291-scidok-24413
Date of registration: 2-Nov-2009
Faculty: SE - Sonstige Einrichtungen
Department: SE - INM Leibniz-Institut für Neue Materialien
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