Abstract
ZnO, Zn0.9Cu0.1O, Zn0.8Cu0.2O and Zn0.7Cu0.3O nanorod arrays are produced via a two-step process including an initial sol–gel method followed by hydrothermal growth. Effects of the Cu on microstructure, surface topography and optical properties of the nanorod arrays were studied and discussed. The results indicate that the nanorod arrays with a highly preferred orientation along the c axis were obtained on glass substrate. The Zn0.7Cu0.3O possesses the maximum density of nanorod arrays of 6.0 × 109 cm−2. The optical band-gap energy Eg decreases first and then increases with Cu additions increase. The broadening of the optical band-gap can be explained by Moss–Burstein effect. The Cu additions will effective enhance the violet emission and suppress the green emission. The violet and green emissions are likely due to the electron transition from the localized level below conduction band and oxygen vacancy to the valance band.
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 callMore From: Journal of Materials Science: Materials in Electronics
Disclaimer: 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.
