Abstract
Abstract The results of electron paramagnetic resonance (EPR), photo-EPR, and optical detection of EPR (ODEPR) investigation of different point defects in ZnO single crystals, ceramics and powders are reported. The main attention is given to EPR and photo-EPR studies of oxygen vacancy (VO) being in scope of many experimental and theoretical investigations. Different EPR and ODEPR spectra related to VO and reported in literature are analyzed and their temperature stability is investigated. The properties of the Pb atoms playing important role in spin dependent recombination process are studied. Specific features of the VO+ and Pb3+ EPR spectra, such as (i) reversal and not reversal change of EPR lines intensity under excitation by light with different wavelengths, (ii) fast increase followed by slow decrease of EPR spectra when light is switched on, (iii) correlation between EPR photoexcitation and persistent microwave photoconductivity are discussed. Spectral and time dependences of the Pb3+ EPR spectrum are explained taking into account double donor nature of Pb in ZnO. Experimental results on the photoexcitation and quench of the VO+ EPR spectrum in different ZnO samples are reported.
Published Version
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.
