以Zn粉为原料,在CuE(E=S,Se)微米球的辅助下,采用化学气相沉积(CVD)法在Si衬底上成功制备出微米级ZnE(E=S,Se)网状晶须。用XRD,EDS,SEM和PL谱分别对产物的结构、成分、形貌和结晶质量进行了测试和分析。结果表明:生长的ZnS和ZnSe微米晶须均为立方闪锌矿结构,长度达300μm以上,具有接近理想化学计量比的成分和较高的结晶质量。ZnE微米晶须的生长符合氧化还原反应下的气-液-固生长机制,Cu,Zn合金充当了实际的微米晶须生长催化剂,在晶须生长过程中Cu,Zn合金汇聚在一起使ZnE微米晶须形成交叉网状结构。
The micron ZnE (E = S, Se ) reticular whiskers were successfully synthesized by chemical vapor deposition(CVD) method on silicon substrates using Zn and CuE( E = S, Se) micro-spheres as raw materials and adjuvant, respectively. The microstructures, composition, morphologies and crystal quality were characterized and analyzed by X-ray diffractometry (XRD), X-ray energy dispersive spectroscopy (EDS), scanning electron microscopy (SEM) and photoluminescence (PL) spectrum. The results show that the as-synthesized products are ZnS and ZnSe micron-whiskers, both of which are of cubic zinc blende structure, with the length 300 μm, and the composition approach to ideal stoichiometry. Under the redox effects, the growth mechanism of ZnE micro-whiskers accords with vapor-liquid-solid (VLS) process, and the Cu3Zn alloy is proved to play a key role, act as the real growth catalyst and assemble together, making ZnE micro-whiskers with cross and reticular structure during the growth process.