Istituto dei materiali per l'elettronica ed il magnetismo     
Dierre B., Yuan X., Armani N., Fabbri F., Salviati G., Ueda K., Sekiguchi T. Effects of Chemical Treatment on the Luminescence of ZnO. In: Journal of Electronic Materials, vol. 39 (6) pp. 761 - 765. SPRINGER, 233 SPRING ST, NEW YORK, NY 10013 USA, 2010.
The effects of chemical treatment on the luminescence of ZnO were investigated by cathodoluminescence. For this purpose, ZnO ceramics and O- and Zn-terminated faces of ZnO single crystals were studied. The samples were dipped in KOH and HCl solutions as well as pure H2O for 3 min. H2O and HCl treatments of ZnO ceramics can increase or decrease the initial ultraviolet (UV) intensity depending on the location examined, and induce an increase of the UV intensity under e-beam irradiation. HCl treatment of the Zn-face of ZnO single crystals slightly affects the surface morphology and the luminescence. HCl treatment of the O-face etches the surface to hexagonal pyramidal features. In addition, the initial UV intensity is always lower for the HCl-treated than for the untreated O-face, while the UV intensity increases at the beginning of e-beam irradiation. These results suggest that the UV intensity is influenced by the surface and bulk reactions of H+ with ZnO.
Subject Single crystals
Zinc Oxide

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