Luminescence from oxygen vacancies in MgO crystals thermochemically reduced at high temperatures

Journal Article · Sat Jan 15 04:00:00 EST 1983 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.27.1283· OSTI ID:5642030

Summers, G P; Wilson, T M; Jeffries, B T; Tohver, H T; Chen, Y; Abraham, M M

Experimental measurements and theoretical calculations are reported which may resolve some of the remaining difficulties associated with photoemission from anion vacancies in thermochemically reduced MgO crystals. The intensities of the 2.3- and 3.2-eV luminescence bands are found to be strongly influenced by both the concentrations of H/sup -/ ions and anion vacancies present, and also by the intensity of the approx.5.0-eV exciting light. Theoretical calculations predict that for a /sup 1/A/sub 1g/ relaxation of the surrounding ions the /sup 1/T/sub 1u/ and /sup 3/T/sub 1u/ electronic states of the F center are almost degenerate and approx.0.05 eV above the /sup 3/A/sub 1g/ state. The /sup 1/T/sub 1u/..-->.. /sup 1/A/sub 1g/ and the /sup 3/T/sub 1u/..-->.. /sup 1/A/sub 1g/ transition energies are predicted to be 2.2 and 2.9 eV, respectively.

• Research Organization: Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5642030
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 27:2; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
ANIONS
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL REACTIONS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CRYSTALS
DATA
ELECTRONIC STRUCTURE
EMISSION
EXPERIMENTAL DATA
HIGH TEMPERATURE
INFORMATION
IONS
LOW TEMPERATURE
LUMINESCENCE
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MEDIUM TEMPERATURE
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHOTOEMISSION
PHOTOLUMINESCENCE
POINT DEFECTS
REDUCTION
SECONDARY EMISSION
THERMOCHEMICAL PROCESSES
ULTRALOW TEMPERATURE
VACANCIES
VERY LOW TEMPERATURE