Study on CdZnTe crystal growth parameters optimization
The factors influencing the shape of solid-liquid interface during the process of CdZnTe vertical Bridgman growth were investigated in this paper. The relationship between the temperature gradient and the solid-liquid interface parameter η near the growth interface with different crucible dropping rate was obtained. Here η represents the solid-liquid interfacial concave-convex extent. If η is positive,the solid-liquid interface will be convex into solid phase region and if η is negative,the solid-liquid interface will be convex into liquid phase region. Simulation results show that when the crucible dropping rate (Vp) was rather high (Vp=50mm/h),the value of η dropped greatly with the increase of the solid-liquid interface temperature gradient,and when Vp was low (for example,Vp=0.lmm/h),the value of η declined slowly and had a trend of turning positive value to negative value with the increase of temperature gradient. In particular,when Vp was about lmm/h,the solid-liquid interface tended to be flat with the increase of the temperature gradient. Therefore,it might be concluded that when the temperature gradient of solid-liquid interface was greater than 10K/cm,and Vp was about lmm/h,rather flat solid-liquid interface during the process of crystal growth could be obtained. In addition,based on the simulation results,actual crystal growth experiments were implemented. The experimental results are roughly consistent with the simulation results.
CdZnTe crystal growth FE simulation vertical Bridgman
Lingen Dai Wenbin Sang Jiahua Min Chenying Zhou Ying Gu Changjun Wang Yongbiao Qian
School of Materials Science & Engineering,Shanghai University,Shanghai 200072
国际会议
9th International Conference on Solid-State and Integrated-Circuit Technology(第9届固态和集成电路国际会议)
北京
英文
749-752
2008-10-20（万方平台首次上网日期，不代表论文的发表时间）