Abstract
Emission spectra ofMgO, Al 2O3, Y2O3, andSc 2O3 crystals, excited at 8 K by photons with energies 5–40 eV, are measured. The luminescence of free excitons andGe 2+ centers forMgO, the self-trapped exciton emission (STEE) forAl 2O3 andY 2O3, and the tunnel self-luminescence forScO 3 are studied. A distinction between hole polarons in oxides and self-trapped holes in halides leads to a sharp difference in the mechanisms of STEE creation on electronhole recombination for these two classes of solids. The electron-hole, hole-electron, and exciton mechanisms of excitation multiplication are identified. The high radioresistance of wide-gap oxides and the behavior of oxygen interstitials inMgO crystals are discussed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
