CHARGE-TRANSFER PROCESSES AND DYNAMIC EQUILIBRIUM OF ELECTRONIC-STATEOCCUPANCIES IN OPTICALLY-EXCITED SRTIO3-CR CRYSTALS

Authors
BASUN SA BIANCHI U BURSIAN VE KAPLYANSKII AA KLEEMANN W SOCHAVA LS VIKHNIN VS
Citation
Sa. Basun et al., CHARGE-TRANSFER PROCESSES AND DYNAMIC EQUILIBRIUM OF ELECTRONIC-STATEOCCUPANCIES IN OPTICALLY-EXCITED SRTIO3-CR CRYSTALS, Journal of luminescence, 66-7(1-6), 1995, pp. 526-530
Citations number
9
Categorie Soggetti
Optics
Journal title
Journal of luminescence → ACNP
ISSN journal
00222313
Volume
66-7
Issue
1-6
Year of publication
1995
Pages
526 - 530
Database
ISI
SICI code
0022-2313(1995)66-7:1-6<526:CPADEO>2.0.ZU;2-F
Abstract
Spectral and kinetic measurements of (2)E --> (4)A(2) photoluminescenc e (PL) in SrTiO3 crystals containing small amounts of Cr were performe d and a strong effect of IR illumination on the PL was observed. The d ominant photoionization mechanism of Cr-3 + PL excitation was establis hed. The locations in the SrTiO3 band gap of Cr3+ donor levels (1.85 e V below the bottom of the conduction band) and of Cr4+ acceptor levels (1.4 eV above the top of the valence band) were found. A new mechanis m of optical erasing of burnt spectral holes of the R lines in SrTiO3: Cr was determined.