Niobia sol gel: a new material for electrochromic and photoelectric applications

Cesar O. Avellaneda; Marcelo A. Macedo; Aariovaldo O. Florentino; Djalma Barros Filho; Michel Andre Aegerter

doi:10.1117/12.188976

13 October 1994 Niobia sol gel: a new material for electrochromic and photoelectric applications

Cesar O. Avellaneda, Marcelo A. Macedo, Aariovaldo O. Florentino, Djalma Barros Filho, Michel Andre Aegerter

Proceedings Volume 2288, Sol-Gel Optics III; (1994) https://doi.org/10.1117/12.188976
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

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.

Citation Download Citation

Cesar O. Avellaneda, Marcelo A. Macedo, Aariovaldo O. Florentino, Djalma Barros Filho, and Michel Andre Aegerter "Niobia sol gel: a new material for electrochromic and photoelectric applications", Proc. SPIE 2288, Sol-Gel Optics III, (13 October 1994); https://doi.org/10.1117/12.188976

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