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

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.