PL study of oxygen defect formation in ZnO nanorods

Photoluminescence (PL) study of needle-like ZnO nanorods grown under standard and oxygen-rich conditions is presented. The yellow-orange band at similar to 580nm increases with excess oxygen during growth. Subsequent annealing in a reducing atmosphere shows the disappearance of this band. The yellow-orange emission is attributed to oxygen interstitials (O-i). (C) 2008 Elsevier Ltd. All rights reserved.