Effect of carbon-doping on structural and dielectric properties of zinc oxide

Abstract

In this paper, Carbon-doped Zinc Oxide (C-ZnO) samples were prepared using the solid-state reaction method. The influence of carbon-doping on the structural and dielectric properties of ZnO samples was studied. The shift in the highest peak position (101) in XRD patterns of carbon-doped samples was observed. The Raman peak at 581cm-1 in undoped ZnO was shifted and broadened in carbon-doped ZnO samples. The ZnO samples doped with carbon show higher values of dielectric constant (2400 at 1kHz) compared to pure ZnO(9 at 1kHz) which was due to increase in native point defects in the samples. The ac conductivity (σac) value of the carbon-doped sample was enhanced by 103 times for ((ZnO)0.9 C0.1) sample.