中文摘要：

以高纯Mg、Se单质为原料，NH。C1作反应促进剂，温度为999～992oC，采用化学气相输运法（CVT）成功合成出MgSe多晶。采用X射线粉末衍射仪、紫外一可见-近红外分光光度计、傅立叶变换红外光谱仪以及光致发光测试系统研究了MgSe多晶的结构和光学特性。结果表明：合成物为MgSe多晶，具有NaCl型结构，禁带宽度玩为1．98eV，在1．6eV附近内存在与施主一受主对辐射复合发光相关的发光带。研究证明由Mg、Se单质在促进剂NH。C1辅助下直接合成MgSe多晶是一种较好的方法。

英文摘要：

MgSe polycrystalline were grown by chemical vapor transport （CVT） method, using Mg and Se elements as the raw materials and NH4C1 as the transport agent, respectively. The temperature range for synthesizing samples are from 999 ℃ to 992 ℃. The as-grown MgSe polycrystalline were characterized by XRD,UV-VIS-NIR spectrophotometer, infrared spectrometer and photoluminescence for their structures and optical properties. The results indicate the product is MgSe polycrystalline, which have NaC1 structure, the Es of MgSe polycrystalline is 1.98 eV. Two emission bands were detected around 1.6 eV, which can be attributed to donoracceptor recombination. The results prove that growing MgSe polycrystalline in one step from magnesium and selenium with the assistance of NH4 C1 reaction accelerator is a good method.