Spectroscopic study of light-induced charge transfer processes in pure KNSBN, KNSBN : Ce and KNSBN : Cu crystals

DC FieldValueLanguage
dc.contributor.authorGao, M
dc.contributor.authorKapphan, S
dc.contributor.authorYue, XF
dc.date.accessioned2021-12-23T16:11:18Z-
dc.date.available2021-12-23T16:11:18Z-
dc.date.issued1999
dc.identifier.issn03701972
dc.identifier.urihttps://osnascholar.ub.uni-osnabrueck.de/handle/unios/9633-
dc.description.abstractPhotorefractive potassium sodium strontium barium niobate (KNSBN) crystals show two light-induced absorption bands under illumination at low temperature. The first absorption lies in the NIR (around 0.72 eV) and can be assigned to Nb4+ polarons. The second light-induced absorption appears as a broad band in the VIS spectral region (around 2.0 eV). The temperature dependence and the decay kinetics of the two centers are investigated for pure KNSBN, KNSBN:Ce and KNSBN:Cu crystals. Pure KNSBN crystals show a photoluminescence emission band around 765 nm, whereas Ce or Cu doping quenches the luminescence of KNSBN crystals. Two thermoluminescence peaks are observed at 80 and 228 K, respectively, with the same spectral distribution in pure KNSBN, confirming the existence of two electron trapping centers induced by illumination. The related light-induced charge transfer processes and the roles of Ce and Cu in KNSBN crystals are discussed and compared with similar centers in SBN crystals.
dc.language.isoen
dc.publisherWILEY-V C H VERLAG GMBH
dc.relation.ispartofPHYSICA STATUS SOLIDI B-BASIC RESEARCH
dc.subjectBARIUM NIOBATE CRYSTAL
dc.subjectGROWTH
dc.subjectION
dc.subjectMULLER PHASE
dc.subjectPEROVSKITE-LIKE FERROELECTRICS
dc.subjectPHOTOREFRACTIVE PROPERTIES
dc.subjectPhysics
dc.subjectPhysics, Condensed Matter
dc.subjectPOLAR MICRODOMAINS
dc.subjectPUMPED PHASE CONJUGATION
dc.subjectSINGLE-CRYSTALS
dc.subjectTRANSFER VIBRONIC EXCITONS
dc.titleSpectroscopic study of light-induced charge transfer processes in pure KNSBN, KNSBN : Ce and KNSBN : Cu crystals
dc.typejournal article
dc.identifier.doi10.1002/(SICI)1521-3951(199907)214:1<187::AID-PSSB187>3.0.CO;2-7
dc.identifier.isiISI:000082547300026
dc.description.volume214
dc.description.issue1
dc.description.startpage187
dc.description.endpage202
dc.publisher.placeMUHLENSTRASSE 33-34, D-13187 BERLIN, GERMANY
dcterms.isPartOf.abbreviationPhys. Status Solidi B-Basic Res.
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