Photoluminescence phenomena prevailing in c-axis oriented intrinsic ZnO thin films prepared by RF magnetron sputtering

Abstract

The substantial amount of –OH groups attached to the Zn lattice has been correlated to the dominant <italic>c</italic>-axis orientation of the hexagonal ZnO crystals with wurtzite structure, which demonstrates two preferred first-order Raman peaks and also exhibits a distinct UV luminescence band due to the typical exciton emission or near-band-edge emission.