Abstract
We verified the electrical properties of zinc oxide (ZnO) and hydrated polyvinyl alcohol (PVA)/ZnO films under the influence of electric field through photoluminescence (PL) analysis. The ZnO films were deposited by sputtering on A-N-B substrates that had nonconductive areas (N) between A and B electrodes. The PVA/ZnO films were prepared by spin-coating PVA gel on top of the ZnO film. Current–voltage (I–V) data analysis showed that the conductivity values of the ZnO films significantly increased in the presence of PVA gel. Large amounts of free electrons and oxygen vacancies (Vo) were generated by the chemisorption reaction of PVA gel with ZnO and detected by PL spectra produced without the presence of an electric field (0V). The Fermi-energy level for a PVA/ZnO film approaches the conduction band of ZnO because of many free electrons in the film. The variations of both the free electron and Vo densities for ZnO and PVA/ZnO films were analyzed using PL spectra in the presence of various electric fields (>0V). The conduction mechanism of PVA/ZnO was explained and related to the variations of both the free electron and Vo densities as revealed by the PL spectral analysis.
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.
