Hydrothermal growth and characterization of ZnO crystals

Abstract ZnO crystals with dimensions of 30×38×8 mm 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 (0 0 0 1) and − c (0 0 0 1¯) were 0.17 and 0.09 mm/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 80 Ω cm, the carrier concentration was about 10 4 /cm 3 , and the mobility was about 100 cm 2 /V s. The full-width at half-maximum (FWHM) of double axis X-ray rocking curve for the polished Zn face cut from + c sector was 45 arcsec. 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.

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