氧化锌晶体的水热法生长及性能表征  

Hydrothermal Growth and Characterization of ZnO Crystals

作　　者：左艳彬[1] 周卫宁[1] 张昌龙[1] 杭寅[2] 霍汉德[1] 覃世杰[1] 卢福华[1] 顾书林[3] 张海霞[1] 白浪[1] 

机构地区：[1]桂林矿产地质研究院,广西桂林541004 [2]中国科学院上海光学精密仪器研究所,上海201800 [3]南京大学,江苏南京210093

出　　处：《发光学报》2008年第3期470-474,共5页Chinese Journal of Luminescence

基　　金：国家自然科学基金(50532100);广西自然科学基金(0731016)资助项目

摘　　要：报道以块状氧化锌陶瓷为培养料,KOH、LiOH和H2O2的混合水溶液为矿化剂体系,采用水热法生长出尺寸为30mm×38mm×8mm的氧化锌晶体。氧化锌晶体+c(0001)和-c(0001)方向的生长速度分别为0.17,0.09mm/day。+c面的颜色为浅绿色,而-c面的颜色为深褐色。在室温下测得+c面的载流子浓度为104cm-3,电阻率为80Ω·cm,迁移率为100cm2/V·s。晶体(0001)面的双晶摇摆曲线的FWHM为45arc-sec。对氧化锌晶体+c面在室温条件下的光致发光谱和吸收光谱进行了测试分析。Because of the high basicity of mineralizer solution used for growing ZnO crystal, a closed precious inner metal container is essential for preventing the incorporation of impurities from the inner surface of the autoclave and for the growth of high-quality ZnO single crystal. Many researchers used platinum inner container but Pt is quite costly. In this paper, we report our growth of single ZnO crystals by the hydrothermal method using a gold inner container and the characterization of the grown crystals. ZnO crystals have been grown by the hydrothermal method using a mixed solution of KOH, LiOH and H2O2 as the mineralizer. The growing rates for ＋ c（0001 ） and -c（000^-1） direction are 0.17 and 0.09 mm/ day, respectively. The impurity concentration was determined by inductively coupled plasma mass spectroscopy （ICP-MS）. The crystal-hnity of the grown ZnO crystal was characterized by X-ray rocking curve measurement using a Philips X＇pert MRD. The absorptivity was tested by a Jasco V-570 UV/Vis/NIR spectrophotometer, and the photoluminescence（PL） exited by a He-Cd laser （A = 325 nm） was measured at room temperature. The results show that the incorporation of K was under detective limit; Li originated from LiOH was observed in both ＋c and -c regions. In addition, Au that may be corroded by H2O2 and Si came from the nutrients were also observed by ICP-MS. Other impurity concentrations （such as AI, Fe, Cu, and Pb） of the -c region were much higher than those of the ＋ c region, and the crystal color changes from light green for ＋c sector to dark brown for -c sector. The full-width at half-maximum （FWHM） of double axis X-ray rocking curve for the polished Zn face cut from ＋c sector is 45 arcsec. For the ＋c sector, the resistivity at room temperature is 80 Ω·cm, the carrier concentration is about 104 cm^-3, and the mobility is about 100 cm^2/V·s. The photoluminescence （PL） spectrum has only a strong UV emission at 376 nm （3.3 eV） from the band edge and the absorption s

关 键 词：氧化锌晶体 水热法 晶体生长 衬底 

分 类 号：O482.31[理学—固体物理]