Ehrentraut D.,Tohoku University |
Goh G.K.L.,Institute of Materials Research and Engineering of Singapore |
Fujii K.,Tohoku University |
Ooi C.C.,Institute of Materials Research and Engineering of Singapore |
And 5 more authors.
Journal of Solid State Chemistry | Year: 2014
The aqueous synthesis of uniform single crystalline homoepitaxial zinc oxide, ZnO, and magnesium zinc oxide, MgxZn1-xO, films under very low temperature conditions at T=90°C and ambient pressure has been explored. A maximum Mg content of 1 mol% was recorded by energy dispersive spectroscopy. The growth on the polar (0 0 0 1) and (0 0 0 1̄) faces resulted in films that are strongly different in their structural and optical quality as evidenced by high-resolution X-ray diffraction, secondary electron microscopy, and photoluminescence. This is a result of the chemistry and temperature of the solution dictating the stability range of growth-governing metastable species. The use of trisodium citrate, Na3C 6H5O7, yielded coalesced, mirror-like homoepitaxial films whereas adding magnesium nitrate hexahydrate, Mg(NO 3)2·6H2O, favors the growth of films with pronounced faceting. © 2013 Elsevier Inc.