The Optical Blueshift Saturation Behavior of MgхZn1-хO Films

Аннотация

By analyzing the results of composition-dependent X-ray diffraction spectra, scanning electron microscopy images, absorption spectra, and CL spectra, the crystalline structural disorder was determined via Urbach energy value. Furthermore, a competition mechanism between band-filling effect and band tail states was proposed in the composition-dependent CL spectra.This competition is believed to be responsible for the composition-induced blueshift saturation often observed in the disordered alloy semiconductors. The results of this research can provide important reference in energy-band engineering.