Abstract
Persistent photoconductivity and photoinduced superconductivity have been previously observed in various stoichiometries of YBa2Cu3Ox. The physical mechanism which is responsible for these effects is still under debate. Through an investigation of laser ablated YBa2Cu3Ox thin film compositions, photoluminescence spectra and infrared spectroscopy, the possibility that the mechanism may be defect related has been supported. A correlation between photoluminescence spectra and wavelength dependence support an oxygen defect model of photoinduced persistent conductivity and superconductivity in which the oxygen vacancies act as weakly luminescent F-centers and F+-centers under illumination. Upon infrared illumination the trapped electrons are photoexcited resulting in a partial quenching of the persistent photoconductivity state.© (1996) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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