Preparation and characteristics of the wide gap semiconductor Mg0.18Zn0.82O thin film by L-MBE
The high purity ZnO ceramic target and the (MgO)0.1(ZnO)0.9 target were fabricated. The wurtzite-phase ZnO thin film and ternary MgxZn1?xO thin film were grown on sapphire (0001) substrates by laser molecular beam epitaxy (L-MBE) from the sintered ceramic targets separately. The films' transmittance spectra at room temperature for the ZnO film and the MgxZn1?xO film were measured and compared while their room temperature photoluminescence spectra were done. The band-gap modulation is realized from 3.31eV for the ZnO film to 3.64eV for the MgxZn1?xO alloy film. The Mg content x in the MgxZn1?xO alloy film was determined to be 0.18.
l-mbe ceramic target zno thin film mgzno alloy thin film