Green coloration of Co-doped ZnO explained from structural refinement and bond considerations
Language
en
Article de revue
This item was published in
Inorganic Chemistry. 2007, vol. 46, n° 26, p. 10996-11002
American Chemical Society
English Abstract
ZnO doped with Co2+ has been prepared by a Pechini process and investigated in terms of crystallographic structure and UV-visible properties. We emphasize for the first time a splitting of the ZnO band gap in two "sub-band ...Read more >
ZnO doped with Co2+ has been prepared by a Pechini process and investigated in terms of crystallographic structure and UV-visible properties. We emphasize for the first time a splitting of the ZnO band gap in two "sub-band gaps" (never clearly mentioned until now) which is fully interpreted basing on the iono-covalent nature of the O-Zn bonds. An anticipative approach of the potential structure relaxations was discussed from exchanged effective charge per bond calculated with the purely ionic Brown and Altermatt model.Read less <
English Keywords
Electric charge
Color
UV and visible spectra
Bond length
Band gap
Zinc oxide
Cobalt(2+)
Origin
Hal imported