1. Photoelectrochemical properties of Sol-Gel Nb2O5 films
- Author
-
Ulf Werner, Djalma De A. Barros Filho, Michel A. Aegerter, and Pompeu P. Abreu Filho
- Subjects
Materials science ,Photoelectrochemistry ,Nanoparticle ,Photoelektrochemie ,law.invention ,Biomaterials ,law ,Solar cell ,Halbleiter ,Materials Chemistry ,Sol-Gel-Verfahren ,Sol-gel ,business.industry ,Photoconductivity ,General Chemistry ,Condensed Matter Physics ,Electronic, Optical and Magnetic Materials ,Amorphous solid ,Semiconductor ,Ceramics and Composites ,Optoelectronics ,Quantum efficiency ,ddc:620 ,business - Abstract
Structural, optical, electro and photoelectrochemical properties of amorphous and crystalline sol-gel Nb2O5 coatings have been determined. The coatings are n-type semiconductor with indirect allowed transition and present an overall low quantum efficiency (Ø < 4%) for UV light to electric conversion. The photoconducting behavior of the coatings is discussed within the framework of the Gärtner and Södergren models. Improvement can be foreseen if Nb2O5 coatings can be made of 10—20 nm size nanoparticles.
- Published
- 2009
- Full Text
- View/download PDF