High-quality hexagonal ZnO crystals grown by chemical vapor deposition

作者：Li Zhenjun; Hu Zuofu; Liu Fengjuan; Sun Jian; Huang Haiqin; Zhang Xiqing^*; Wang Yongsheng

来源：Materials Letters, 2011, 65(5): 809-811.

DOI：10.1016/j.matlet.2010.12.027

• Zinc oxide
• Chemical vapor deposition
• Optical materials and properties

High-quality zinc oxide (ZnO) crystals were grown on a (0001) sapphire substrate by chemical vapor deposition at 830 degrees C under atmospheric pressure. The hexagonal crystals had an average diameter of about 150 pm, and a thickness of about 15 mu m, as observed under a polarizing microscope. The large (0002) facet was flat, regular, and neat. In the X-ray diffraction pattern, strong (0002) and weak (0004) peaks indicate that the crystals had a wurtzite structure. The crystalline quality was characterized by Raman scattering, and the E(2)(high), E(2)(low), and A(1)(LO) modes confirm the high quality of the ZnO crystals. Photoluminescence (PL) spectra of the crystals had a strong and sharp ultraviolet emission peak at 379 nm. The PL mechanism was also discussed.

• 出版日期2011-3-15
• 单位北京交通大学