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Proceedings Paper

Niobia sol gel: a new material for electrochromic and photoelectric applications
Author(s): Cesar O. Avellaneda; Marcelo A. Macedo; Aariovaldo O. Florentino; Djalma Barros Filho; Michel Andre Aegerter
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Paper Abstract

Nb2O5 prepared by a sol-gel process in the form of coatings are new materials which have outstanding properties: (1) The coatings present electrochromic properties and exhibit a blue coloration under Li+ insertion with 100% reversible variation of the optical transmission in the visible and near infrared range between 80% and 20% and have a high chemical stability (tested up to 2000 cycles). (2) They are semiconductors and present a photoelectric effect when illuminating in the UV region ((lambda) < 360 nm). These films are therefore very promising for use in electrochromic devices and as electrodes for photoelectrochemical purposes and the development of nanocrystalline solar cells.

Paper Details

Date Published: 13 October 1994
PDF: 13 pages
Proc. SPIE 2288, Sol-Gel Optics III, (13 October 1994); doi: 10.1117/12.188976
Show Author Affiliations
Cesar O. Avellaneda, Univ. of Sao Paulo (Brazil)
Marcelo A. Macedo, Univ. of Sao Paulo (Brazil)
Aariovaldo O. Florentino, Univ. of Sao Paulo (Brazil)
Djalma Barros Filho, Univ. of Sao Paulo (Brazil)
Michel Andre Aegerter, Univ. of Sao Paulo (Brazil)


Published in SPIE Proceedings Vol. 2288:
Sol-Gel Optics III
John D. Mackenzie, Editor(s)

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