碘输运剂对CVT法制备ZnSe单晶的性能影响研究  

Effect of Iodine as Transport Agent on Properties of ZnSe Crystals by a Chemical Vapour Transport Method

作　　者：刘翠霞[1] 坚增运[1] 罗贤[2] 王宇鹏[1] 

机构地区：[1]西安工业大学,陕西西安710032 [2]西北工业大学,陕西西安710072

出　　处：《稀有金属材料与工程》2014年第4期866-869,共4页Rare Metal Materials and Engineering

基　　金：陕西省教育厅科研项目(2013JK0908);西安工业大学校长基金(XAGDXJJ1008);西安工业大学创新基金(201210702093)

摘　　要：采用I2作为输运剂，以单质Zn和Se为原料运用化学气相输运法制备了ZnSe晶体。比较了不同I2含量下所生长ZnSe晶体的性能，借助XRD、SEM和EDS检测方法分析了ZnSe晶体的结构、形貌和成分。结果表明：I2含量对ZnSe晶体性能具有重要的影响，通过比较3组I2含量所制备的ZnSe晶体，确定出当I2含量为4mg／cm3时，所生长的ZnSe晶体具有较好的结晶质量，其晶格常数为5．668nm。测定ZnSe中Zn与Se的原子分数比为1：0．99，且只有1个衍射峰（2θ=-27．2°），其晶面指数为（111）。SEM图像表面比较平滑，没有明显气孔。在此条件下，ZnSe晶体的红外透过性能最好，红外透过率为53．07％-62．61％。其他两种I2含量下所生长的ZnSe晶体结晶质量较差，XRD图谱显示有多个衍射峰，SEM图像表面凹凸不平，有明显气泡和孔洞，并且其红外透过率较低。With iodine as transport agent, ZnSe was prepared using simple substance of Zn and Se as raw materials by a Chemical Vapour Transport method （CVT）. Properties of as-grown ZnSe crystals with different content of iodine were compared. The structure, morphology and composition of the as-grown ZnSe crystal were detected by XRD, SEM and EDS. The result shows that the content of iodine plays an important role in high-quality ZnSe crystal. The property of ZnSe crystal is the best when the content of iodine is 4 mg/cm3. The crystal parameter is 5.668 nm. Atomic percentage of Zn and Se is 1：0.99. There is only one strong diffraction peak when 2θ is 27.2° and crystal surface is （111）. The surface of ZnSe crystal is relatively smooth without obvious pores in the SEM image. On this situation, the infrared transmittance is best, whose ratio of infrared transmittance is in the range from 53.07% to 62.61%. Properties of ZnSe crystals for the other two content of iodine are poorer. There are several peaks in XRD pattern. The surface of ZnSe crystal is uneven with obvious pores and holes in the SEM image. Furthermore, the ratio of infrared transmittance is lower.

关 键 词：ZnSe晶体 化学气相输运法 碘输运剂 

分 类 号：TN304.2[电子电信—物理电子学] O731[理学—晶体学]