Tuning the bandgap of Zn<inf>1&#x2212;x</inf>Mn<inf>x</inf>O thin films prepared by the sol-gel method

Abstract

The morphology and optical properties of Zn 1-x Mn x O films were synthesized by sol gel method using spin coating technique. Zn 1-x Mn x O thin films is prepared using 2methoxyethanol solution of zinc acetate dehydrate and manganese acetate tetrahydrate. The solution is stabilized by MEA. The quantity of Mn in the sol was varied from x = 0, 0.02, 0.04, 0.06 and 0.08 with annealing temperature of 600ºC. Investigation of the physical properties and presence of nanostructures were executed using SEM and XRD characterization. Addition of Mn lead to the formation of nanosize rod structures.The optical properties were characterized using UV-Vis where the band gap and transmittance can be determined. Results show that the transmittance spectra and band gap reduces after a certain percentage of Mn addition. The variation of the band gap performance with dopant concentration is also examined. Index Term-sol gel method, Zn 1-x Mn x O thin film

Effect of Mn doping on the structural and optical properties of ZnO films

“…Different method of doped ZnO preparation will produce different outcomes. In this paper, the influences of Mn incorporation on the structural and optical properties of Mn doped ZnO is studied at an annealing temperature of 700ºC and is an extension of our previous work [7].…”