Sol-gel coatings for optoelectronic devices

Book · Sat Dec 31 04:00:00 EST 1994

OSTI ID:194809

Avellaneda, C O; Macedo, M A; Florentino, A O; Aegerter, M A ^[1]

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1. Univ. of Sao Paulo, Sao Carlos (Brazil). Inst. de Fisica e Quimica

Nb{sub 2}O{sub 5} 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{sup +} insertion with 100% reversible variation of the optical transmission in the visible and near infrared range between 80% and 200% and have a high chemical stability (tested up to 2,000 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. (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 for air pollution control.

• OSTI ID: 194809
• Report Number(s): CONF-9404167--; ISBN 0-8194-1564-2
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
36 MATERIALS SCIENCE
54 ENVIRONMENTAL SCIENCES
CATALYTIC CONVERTERS
ELECTROCHROMISM
EXPERIMENTAL DATA
FOAMS
MATERIALS
NIOBIUM OXIDES
PHOTOELECTROCHEMICAL CELLS
SEMICONDUCTOR MATERIALS
SOL-GEL PROCESS
SOLAR CELLS
USES