Growth of the 2-in-size bulk ZnO single crystals by the hydrothermal method
2003; Elsevier BV; Volume: 260; Issue: 1-2 Linguagem: Inglês
10.1016/j.jcrysgro.2003.08.019
ISSN1873-5002
AutoresEriko Ohshima, Hiraku Ogino, Ikuo Niikura, Katsumi Maeda, Mitsuru Satô, Masumi Ito, Tsuguo Fukuda,
Tópico(s)Ga2O3 and related materials
ResumoThe hydrothermal method combined with a platinum inner container was applied to grow zinc oxide (ZnO) single crystals. High-purity and transparent single crystals with a large size of 50×50×15 mm3 were successfully grown. The higher crystallinity of the hydrothermally grown ZnO crystal compared with the commercial ZnO substrate grown by the chemical vapor transport method was confirmed by X-ray diffraction. The +c region of the crystal is colorless and the −c region of it is pale green, relating to the unique residual impurity distribution. In the photoluminescence spectrum, a strong emission from the band edge at 3.3 eV was observed. On the other hand, the emission from the deep level at 2.2 eV was not observed. These results clearly indicate that this study assures the commercialization of the 2-in-size ZnO single crystal for future wide band gap device applications.
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