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doi:10.22028/D291-24217
Titel: | Electrochromic properties of Nb2O5 sol-gel coatings |
VerfasserIn: | Avellaneda, César O. Schmitt, Mike Heusing, Sabine Aegerter, Michel A. Pawlicka, Agnieszka |
Sprache: | Englisch |
Erscheinungsjahr: | 1998 |
Quelle: | Solar energy materials & solar cells. - 54. 1998, S. 9-17 |
Kontrollierte Schlagwörter: | Sol-Gel-Verfahren Niob Oxide Tauchbeschichten |
DDC-Sachgruppe: | 500 Naturwissenschaften |
Dokumenttyp: | Journalartikel / Zeitschriftenartikel |
Abstract: | Sol-gel niobium oxide coatings are promising electrochromic materials. The sols have been prepared by a sonocatalytic mixing of NbCl5 powder, butanol and acetic acid. Thermal analysis (DTA/TG) coupled to mass spectrometry has been performed on Nb2O5 precipitates to quantitatively analyse the effluents. Transparent and defect-free single and multilayers coatings have been deposited on ITO-coated glass by a dip-coating process and then calcined between 400 degrees C and 600 degrees C. The coatings structure change from amorphous to crystalline (TT form) and the later ones are highly textured. The films present a reversible and fast insertion/extraction kinetics for Li+ ions. After insertion the amorphous coatings present a grey-brown color, while the crystalline ones are dark blue. The maximum charge density exchanged with a three-layer 200 nm thick coating sintered at 600 degrees C was 16 mC/cm(2) with a corresponding spectral transmission change practically wavelength-independent varying from 80% to 20%. The coloring efficiency determined at lambda = 600 nm was 22 cm(2)/C. |
Link zu diesem Datensatz: | urn:nbn:de:bsz:291-scidok-24505 hdl:20.500.11880/24273 http://dx.doi.org/10.22028/D291-24217 |
Datum des Eintrags: | 19-Nov-2009 |
Fakultät: | SE - Sonstige Einrichtungen |
Fachrichtung: | SE - INM Leibniz-Institut für Neue Materialien |
Sammlung: | INM SciDok - Der Wissenschaftsserver der Universität des Saarlandes |
Dateien zu diesem Datensatz:
Datei | Beschreibung | Größe | Format | |
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aeg199806.pdf | 609,96 kB | Adobe PDF | Öffnen/Anzeigen |
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