Influence of growth parameters on the optical properties of ZnO nanowires

Abstract

ZnO nanowires are source of a great interest in the scientific community due to numerous properties and the wide range of possible applications of this nanoscale material. Influence of the ZnO NWs growth parameters such as growth temperature and growth time on the NWs PL is studied. FESEM images correlated with PL results shows that ZnO NWs growth is optimum for a temperature of 900 ˚C and a growth time of 60 min. PL of ZnO NWs grown on quartz substrate at room temperature show a band gap emission from 375 to 380 nm depending of the NWs size and a defect band from 440 to 760 nm commonly with 3 picks at 505 nm (2.45 eV), 550 nm (2,25 eV) and 630 nm (1.96 eV).