Abstract
ZnO and Mg x Zn 1− x O nanocrystals with Mg concentration of 2−30 at% were grown with non-hydrolytic route employing metal cupferronate complex as precursors. ZnO nanocrystals are spherical and their sizes are independent of Zn precursor concentration, but incorporation of Mg results in Mg x Zn 1− x O nanocrystal morphology and size dependence on Mg precursor concentration. Mg x Zn 1− x O exciton emission is dominant when Mg concentration is less than 10 at%. With a further increase in Mg concentration, deep trap emission becomes dominant. Mg x Zn 1− x O nanocrystal band gap enlarges obviously with an increase in Mg concentration from 2 to 15 at%. With a further increase in Mg concentration, Mg x Zn 1− x O band gap enlarges slowly. Mg x Zn 1− x O band gap can be tuned from 3.30 to 3.84 eV with an increase in Mg concentration from 2 to 30 at%.
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