OPTICALLY INDUCED CHARGE-TRANSFER PATHS BETWEEN DEFECTS IN BATIO3 CONTAINING RHODIUM

Autor(en): KROSE, H
POSSENRIEDE, E
SCHARFSCHWERDT, R
VARNHORST, T
SCHIRMER, OF
HESSE, H
KUPER, C
Stichwörter: Materials Science; Materials Science, Multidisciplinary; Optics
Erscheinungsdatum: 1995
Herausgeber: ELSEVIER SCIENCE BV
Journal: OPTICAL MATERIALS
Volumen: 4
Ausgabe: 2-3
Startseite: 153
Seitenende: 157
Zusammenfassung: 
An optical method is presented which allows to identify at room temperature the photoinduced charge transfers between different defects in photorefractive crystals. The analysis is based on the labelling of the optical spectra with the corresponding microscopic defect models, obtained from simultaneously recording light induced ESR and optical absorption changes at low temperatures. The investigation of as-grown BaTiO3 crystals containing Rh, using this method, shows that illumination with light of energies between 1.2 eV and 2.5 eV transfers holes from Rh4+ to Fe3+. At E > 2.5 eV holes are photoionized from Fe4+ to Rh3+ and to an unidentified shallower hole trap.
Beschreibung: 
Symposium on Photorefractive Materials, at the E-MRS 1994 Spring Meeting, STRASBOURG, FRANCE, MAY 24-26, 1994
ISSN: 09253467
DOI: 10.1016/0925-3467(94)00053-0

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