Light-induced charge transport processes in photorefractive barium titanate doped with rhodium and iron

Autor(en): vanStevendaal, U
Buse, K
Kamper, S
Hesse, H
Kratzig, E
Stichwörter: BLUE BATIO3; CRYSTALS; DEFECTS; INTENSITY-DEPENDENT ABSORPTION; MODEL; Optics; Physics; Physics, Applied
Erscheinungsdatum: 1996
Herausgeber: SPRINGER VERLAG
Journal: APPLIED PHYSICS B-LASERS AND OPTICS
Volumen: 63
Ausgabe: 4
Startseite: 315
Seitenende: 321
Zusammenfassung: 
Absorption, light-induced absorption changes, photo and dark conductivities, bulk photovoltaic currents and two-beam coupling gain coefficients are measured for oxidized, as grown and reduced BaTiO3:Rh,Fe crystals. The oxidized sample shows hole conductivity and three photorefractive levels are present: Rh-4+/5+, Fe-4+/5+ and Rh-3+/4+. The measurements indicate that Rh-3+/4+ is responsible for the photo conductivity and that its energy level is located (0.9 /- 0.1) eV above the valence band edge. The ns grown sample also shows hole conductivity and two photorefractive levels are involved: Rh-3+/4+ and Fe-3+/4+. The results yield that the Fe-3+/4+ level is located (0.95 /- 0.05) eV above the valence band edge. In the reduced sample electrons are the dominant charge carriers and two levels are of importance. The shallow one is located (0.39 /- 0.05) eV below the conduction band edge. Here the performance of this crystal is strongly impaired by a pronounced sublinear photo conductivity.
ISSN: 09462171
DOI: 10.1007/s003400050090

Show full item record

Page view(s)

3
Last Week
0
Last month
0
checked on Feb 20, 2024

Google ScholarTM

Check

Altmetric