Abstract
A Mg composition-dependent blueshift has been studied in Mgx Zn1-xO alloys deposited on 6H-SiC (0001) substrates. The localized exciton energy in Mgx Zn1-xO alloys for x∼0.3 was blueshifted in the range 212-248 meV. The large negative bowing parameter was estimated in Mgx Zn1-xO alloys to be 4.72±0.84 eV. This large bandgap bowing emphasizes the Stokes shift, which has been attributed to the existence of spontaneous polarization effects due to the polar growth of Mgx Zn1-xO /SiC heterostructure and local compositional inhomogeneity.
Original language | English |
---|---|
Article number | 123528 |
Journal | Journal of Applied Physics |
Volume | 104 |
Issue number | 12 |
DOIs | |
Publication status | Published - 2008 |