You are here: Home :: Area NEM :: Chemistry :: Physical chemistry

H. Wittmer, J. Engeldinger, Rolf Hempelmann, H.D. Breuer

Apparent Band Shift of Cr³⁺-Doped Titania as Observed by Photoacoustic and Impedance Spectroscopy

Titania (TiO₂) exhibits widespread technical applications extending from photocatalysis for the oxidative degradation of organically polluted waste water up to photo-electrochemistry in novel solar cells. The band gap of about 3.2 eV, well suited for UV absorption, does not, however, allow to utilise the visible part of the natural sunlight. A reduction of the energy gap is possible by doping with transition metal ions. In this paper we use Cr³⁺ ions which turned out to be very efficient dopants. The resulting apparent bathochromic band shift is studied by photoacoustic and impedance spectroscopy.

Zeitschrift für Physikalische Chemie, Oldenbourg Wissenschaftsverlag

Print ISSN: 0942-9352
Volume: 214, 06/2000
Pages: 709

Journal homepage (external site)

Show all available items of this journal

 

Area NEM