Photoluminescence of ZnO Whiskers with Various Excitation Intensity at Room Temperature
Hexagonal ZnO whiskers were prepared by using an optical floating zone furnace. Most of the as-grown whiskers have diameters of about 20-30 µm and lengths of about 2~3 mm. The characteristic peaks of X-ray diffraction (XRD) verify that the as-grown ZnO whiskers have excellent hexagonal wurtzite phase and (001) orientation. The room-temperature photoluminescence spectra show a near-UV emission band located at 380 nm and a green light emission band centered at 515 nm. The threshold of near-UV emission and lasing were observed.
Fei Hu and Beibei Wang
X. Y. Guo et al., "Photoluminescence of ZnO Whiskers with Various Excitation Intensity at Room Temperature", Advanced Materials Research, Vol. 279, pp. 161-165, 2011