The quantum confinement effect observed in the multiple quantum wells Mg0.27Zn0.73O/ZnO

The multiple quantum wells (MQW) Mg_0.27Zn_0.73O/ZnO have been grown by pulsed laser deposition method with different well width L _w . The optical and structural characteristics of MQW Mg_0.27Zn_0.73O/ZnO have been investigated. The quantum confinement effect showing up in the blue shift of exciton peak in low temperature (8 K) photoluminescence spectra at well width reduction has been studied. It is established that intensity exciton peak I _ex and Einstein’s characteristic temperature Θ _E increase at reduction of well width L _w . It is revealed that the discontinuity ratio of conduction and a valence bands in heterostructure Mg_0.27Zn_0.73O/ZnO is 0.65/0.35 that corresponds to the literature.