垂直Bridgman法生长碲锌镉晶体的数值模拟分析  

Numerical Simulation and Analysis of CZT Crystal Growth by the VB Method

作　　者：马雁冰[1] 刘滔[1] 邹鹏程[2] 姜军[2] 高文峰[1] 罗川旭[1] 林文贤[1] 

机构地区：[1]云南师范大学可再生能源材料先进技术与制备教育部重点实验室,云南昆明650092 [2]昆明物理研究所,云南昆明650223

出　　处：《红外技术》2009年第4期240-245,共6页Infrared Technology

基　　金：973计划前期研究专项(2007CB216405);国家自然科学基金资助项目(50879074)

摘　　要：利用FIDAP数值软件,详细地模拟分析了垂直Bridgman法生长碲锌镉晶体过程,讨论了碲锌镉材料潜热释放及熔体对流对安瓿边界的温场分布的影响,分析了5 K/cm、10 K/cm、15 K/cm三种不同温度梯度条件对固液界面的影响。结果表明:在所采用的模型计算条件下,潜热释放及熔体对流对安瓿边界的温场分布有很小的影响;在生长初期和末期,固液界面变化比较剧烈;随着温度梯度的加大,在生长中期,界面凹向固态区的趋势减小,界面凹向液态区的趋势加大。With FiDAP software, this paper carried out an in-depth analysis of the CdZnTe crystal growth process by the vertical Bridgman method. The effect of the latent heat-release of the CdZnTe material and the melt convection on the temperature distribution at the ampoule boundary was discussed. The effect of three different temperature gradients of 5 K/cm, 10 K/cm and 15 K/cm on the solid/liquid interface was also analyzed. The numerical simulation results show that under the computational conditions considered in the model the effect of the latent heat-release and the melt convection on the temperature distribution is very small at the ampoule boundary. At the initial and final stages of crystal growth, the solid/liquid interface changes significantly; at the middle stage, with the increase of the temperature gradient, the tendency of the concavity of the interface towards the solid region decreases but the tendency of the concavity of the interface towards the liquid region increases.

关 键 词：CDZNTE FIDAP 垂直Bridgman法 数值模拟 

分 类 号：TN213[电子电信—物理电子学]