Abstract
Luminescence spectra of thin films and single crystals of YBa 2Cu 3O 7− x high-temperature superconductors (HTSC) were measured under optical excitation by synchrotron radiation ( E = 10.2 eV) and by electrons (cathodoluminescence) with an energy of 6 keV. It has been shown that in all spectra the main contribution is made by a blue band with an energy of ∼ 2.9 eV, which is, apparently, the luminescence inherent in the crystal. The time characteristics of luminescence were measured. It was found that 80% of all the luminescence has a very long ( τ > 10 −6 s) shaping time. A model of luminescence appearance is proposed, which is based on luminescence of oxygen quasimolecules formed during the decay of electronic excitations (luminescence of self-localized and defect-localized excitons).
Sign-in/Register to access full text options 
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.
