ZnO crystals with dimensions of 30×38×8mm 3 have been grown by the hydrothermal method using a mixed solution of KOH, LiOH and H 2 O 2 . The growing rates for +c(0001) and −c(0001¯) were 0.17 and 0.09mm/day, respectively. The crystal color was very light green for +c sector and dark brown for −c sector. For the +c sector, the resistivity at room temperature was 80Ωcm, the carrier concentration was about 10 4 /cm 3 , and the mobility was about 100cm 2 /Vs. The full-width at half-maximum (FWHM) of double axis X-ray rocking curve for the polished Zn face cut from +c sector was 45arcsec. The photoluminescence (PL) spectrum and the absorption spectrum of +c part of the crystals at room temperature were also reported and discussed in this paper.