Investigation of Electronic and Optical Properties of Al/Ag and Al/N Co-Implanted ZnO Thin Films

Either metal/metal or metal/non-metal co-doping is one of the most effective methods to modulate visible emission ZnO. In this paper, ZnO, aluminum-doped ZnO (Al-ZnO), aluminum and silver co-doped (Al/Ag-ZnO), nitrogen (Al/N-ZnO) are deposited. Combining substitution zinc ions using Al and/or Ag doping oxygen N expected introduce more interstitial vacancy defects related light in films. The results indicate that PL spectrum shows a violet peak at 406 nm other weak peaks. After doping, we observe strong blue 421 nm, its intensity further enhanced attains maximum for Al/N-ZnO. However, Al/Ag-ZnO, shifts toward longer wavelength, conversely decreases. Then, band structures, density states (DOS), partial (PDOS), optical constant doped calculated functional theory (DFT). Based on experimental theoretical results, enhancement mechanism discussed.