Abstract
Persistent photoconductivity (PPC) is observed in RF sputtered SnO2 thin films under illumination with a range of below band gap peak energies from 2.18eV to 3.18eV. This study provides new insights into the PC effect in SnO2 films. Previous studies have confined excitation exclusively to monochromatic near UV illumination or to spectral response that did not follow growth and decay patterns over time. We have found that over the range of energies used for our investigation, the photoconductivity increases up to several orders of magnitude and the level of induced photocurrent rises non-linearly with incident photon energy. The patterns of the response and the transient decay of photocurrent as a function of incident photon energy under vacuum and at atmospheric pressure at room temperature suggest that more than one mechanism accounts for PPC. These results point strongly to a mechanism that is not solely dependent on oxygen adsorption/desorption.
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.
