Growth of ZnO single crystals by an induced nucleation from a high temperature solution of the ZnO-PbF2 system

✍ Scribed by Xinhua Li; Jiayue Xu; Min Jin; Xianjun Wu; Guoxing Qian; Xiaomin Li

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 231 KB
• Volume: 42
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.200610803

✦ Synopsis

Abstract

To grow ZnO single crystals from a high temperature solution of the ZnO‐PbF~2~ system, a gas cooling system was assembled at the bottom of the crucible to induce nucleation in the initial growth stage. The growth experiments were carried out in a homemade vertical Bridgman furnace and Pt crucible of 28 mm in diameter was used. The furnace temperature was set to 1100°C and the flow rate of the oxygen gas was optimized as 3.0 l/min. ZnO crystal up to 5∼8mm in the thickness was obtained with the lowering rate of 0.3 mm/h. XRD patterns showed that the as‐grown crystal was pure ZnO Wurtzite phase. The impurity ions were analyzed by the glow discharge mass spectroscopy (GDMS) as 390.0 ppm and 40.0 ppm for Pb^2+^ and F^‐^, respectively. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)