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Proceedings Paper

Sol-gel coatings for optoelectronic devices
Author(s): Cesar O. Avellaneda; Marcelo A. Macedo; Aariovaldo O. Florentino; Michel Andre Aegerter
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Paper Abstract

Nb2O5 prepared by a sol-gel process in form of coatings and aerogels are new materials which present interesting properties: (a) 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), (b) they are semiconductor and present a photoelectric effect when illuminating in the UV region ((lambda) < 360 nm). These films are therefore very promising to be used in electrochromic devices, as electrodes for photoelectrochemical purpose and the development of nanocrystalline solar cell, and (c) when prepared in aerogel form, the high BET surface area of the powders is a promising asset to use these new materials for catalytic purposes.

Paper Details

Date Published: 9 September 1994
PDF: 14 pages
Proc. SPIE 2255, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII, (9 September 1994); doi: 10.1117/12.185396
Show Author Affiliations
Cesar O. Avellaneda, Univ. de Sao Paulo (Brazil)
Marcelo A. Macedo, Univ. de Sao Paulo (Brazil)
Aariovaldo O. Florentino, Univ. de Sao Paulo (Brazil)
Michel Andre Aegerter, Univ. de Sao Paulo (Brazil)

Published in SPIE Proceedings Vol. 2255:
Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII
Volker Wittwer; Claes G. Granqvist; Carl M. Lampert, Editor(s)

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