混合碱液法生长氧化锌晶体的晶形、表面形貌及光致发光性质(英文)  

Crystal form,Surface Morphology and Photoluminescence Properties of ZnO Crystals Grown in Molten Hydrous Alkali Solutions

作　　者：赵兰玲[1] 王继扬[1] 李静[1] 张素芳[2] 韩树娟[1] 

机构地区：[1]山东大学,晶体材料国家重点实验室,济南250100 [2]衡水学院化学系,河北衡水053000

出　　处：《硅酸盐学报》2012年第12期1773-1778,共6页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(50872066);国家基础研究计划(2010CB-833103)资助项目

摘　　要：以氢氧化钠和氢氧化锂作为助熔剂,采用常压混合碱液法成功生长了各种形貌的ZnO晶体。以Bravais-Friedel-Donnay-Harker法则为指导,获得了ZnO晶体的几种理论结构晶形;在考虑晶体内部结构和生长实验中外部生长条件下,得到了晶体的实验晶形。采用光学显微镜、扫描电子显微镜和原子力显微镜对六方片状晶体的表面形貌进行了研究。结果表明:晶体的理论结构晶形和实验晶形吻合良好;晶体具有二维螺旋生长的机制。此外,晶体在325 nm光激发的室温光致发光光谱显示,在380 nm处存在1个强的紫外发射峰和位于652 nm处的弱且窄的红光发射峰,说明生长的六方片状ZnO晶体结晶质量优良。The ZnO crystals with various morphologies were synthesized with NaOH and LiOH at different mole ratios as a flux via a molten hydrous alkali solutions method. The theoretical and experimental crystal forms of wurtzite ZnO single crystals both were investigated. The theoretical structural form of the wurtzite ZnO was analyzed by the Bravais-Friedel-Donnay-Harker method. The experimental structural form of the ZnO single crystals was determined via the analysis of the internal structure of wurtzite ZnO crystals and the external habit-controlling factors in the crystal growth system. The microscopic surface morphology of the as-grown hexagonal plate-like ZnO crystals was observed by optical microscopy, scanning electron microscopy and atomic force microscopy, respectively. The results indicate that the theoretical and experimental crystal forms of the wurtzite ZnO are similar. The growth mechanism of the synthesized hexagonal plate-like ZnO crystals is of the two-dimensional spiral type. In addition, the photoluminescence spectrum of the ZnO crystal excited by radiation of wavelength 325 nm at room temperature exhibits that an intensive ultraviolet emission peak and a weak and narrow peak for the ZnO crystals are located at 380 nm and 652 nm, respectively.

关 键 词：氧化锌 结构晶形 实验晶形 晶体生长 表面形貌 

分 类 号：O713[理学—晶体学] O734