Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7836539 | Applied Surface Science | 2018 | 8 Pages |
Abstract
Hybrid emitters consisting of ZnO nanowires decorated with Zn nanoflakes were prepared for electron emission applications. The ZnO nuclei, having a pyramidal shape, were deposited on the ZnO:Al buffer layer, which offered surface protrusions for vertical nanowire growth. The Zn hexagonal nanoflakes, having thicknesses of 15-20Â nm, were decorated to increase the conductivity and number of emission sites of the ZnO nanowires. The field enhancement factor increased from 8623 to 18108 and the work function was reduced from 5.3 to 3.35Â eV after decorating the nanowires with Zn nanoflakes. A low turn-on field of 0.65Â MV/m and high current density of 1.46Â mA/cm2 were obtained. The current density variation measured at 350Â V was less than 23% over a measurement time of 180Â min.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Su-Hua Yang, Nai-Chieh Hsu,