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中文摘要：
本文直接以高纯Zn、Se单质为原料，加入少量碘单质作为反应输运剂，用化学气相输运（CVT）的方法一步成功的生长出了ZnSe单晶。采用XRD、EDS、紫外可见分光光度计和光致发光（PL）技术研究了生长的ZnSe晶体的结构、成份以及光学特性。结果表明，生长的ZnSe单晶具有较好结晶性能，成份接近理想的化学计量比，在500—2000nm范围内透过率达到65％～70％，在1．9—2．5eV范围内存在与Zn空位和杂质能级相关的发光带。由Zn和Se单质在输运剂I2的辅助下一步直接生长ZnSe单晶是可行的。
英文摘要：
ZnSe single crystals were grown by the chemical vapor transport （CVT） method in one step, using Zn and Se elements as the raw materials and the iodine as the transport agent. The as-grown ZnSe crystals were characterized by XRD, EDS, UV-Vis spectrophotometer and photoluminescence （PL） for their structures, compositions and optical properties. The results indicate that the as-grown ZnSe single crystals are well crystallized with the compositions close to ideal stoichiometric ratio. The transmittance reaches to 65%-70% in the wavelength range of 500-2000 nm. Three emission bands at 1.9-2.5 eV were detected, which can be attributed to the presence of Zn vacancies and impurities. The researches prove feasibility to grow ZnSe single crystals in one step from zinc and selenium with the assistance of iodine transport agent.
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