ZnO单晶的KOH碱液法生长和表征(英文)

GROWTH AND CHARACTERIZATION OF ZnO SINGLE CRYSTALS WITH HYDROUS KOH MELT METHOD

采用自发成核方法,以KOH碱液作助熔剂,在银、镍和铁坩埚中分别生长了透明、棕绿色和棕色的纤维锌矿氧化锌单晶。X射线衍射和电感耦合等离子体原子发射光谱分析表明:晶体的颜色与所含的杂质有关,这些杂质来源于所使用的坩埚。采用光致发光(photoluminescence,PL)光谱对所生长的晶体进行了表征,结果显示,从银坩埚中生长的氧化锌晶体质量较高,其室温下用325nm波长光激发的PL光谱显示381nm强的紫外发射峰。在此基础上,从200mL银坩埚中生长出了尺寸为φ3mm×34mm氧化锌晶体。

Transparent,brown-green and brown wurtzite zinc oxide （ZnO） single crystals were grown in silver,nickel and iron crucibles separately by the spontaneous nucleation method using hydrous KOH melt as flux.The analysis results of X-ray diffraction and inductively coupled plasma atomic emission spectrometry indicate that the color of the crystals is related to the impurities contained in them that come from the crucibles.In addition,photoluminescence （PL） spectrometry was also employed to characterize the crystals.The results exhibite that the ZnO crystals grown from the silver crucible have high quality,and its PL spectrum excitated by wavelength of 325 nm at room temperature displays the strong ultraviolet emission at 381 nm from the band edge.On this basis,a large ZnO crystal 3 mm in diameter and 34 mm long was grown in a 200 mL silver crucible.