Photoluminescence and Chromaticity Properties of ZnO Nanopowders Made by a Microwave Hydrothermal Method

FourseriesofZnOnanopowdersobtainedbyamicrowavehydrothermalmethodareexamined. Twodifferentsolvents (ethanol and distilled water) and different values of pressure during heating in the reactor were used.The obtained nanopowders show a bright emission covering visible light spectral region, including the bandedge emission. Results of scanning electron microscopy, X-ray diffraction, photo- and cathodoluminescenceinvestigationsandalsoCIE1961chromaticitydiagramarepresented.PACS:78.67.