人工晶体学报2024，Vol.53Issue(4)：641-648,8.
碲锌镉晶体生长温度梯度与界面形状稳定性关系的研究
Relationship Between Temperature Gradient and Interfacial Shape Stability of CZT Crystal Growth
曹聪 1刘江高 1范叶霞 1李振兴 1周振奇 1马启司 1牛佳佳1
作者信息
摘要
Abstract
CdZnTe crystals are widely used as epitaxial substrates for HgCdTe thin films for infrared detectors and in the fabrication of room temperature nuclear radiation detectors.During crystal growth,the interface shape is closely related to the heat state.Combined with the numerical simulation technique to control the temperature field distribution during CdZnTe crystal growth,the crystal growth procedure of micro-convex solidification interface by vertical Bridgman method and vertical gradient freeze method were designed,and the single crystal rate of CdZnTe crystals was analyzed according to the actual crystal growth experiments.The distribution spectrum of Zn components in the longitudinal section of CdZnTe crystals with equal diameters was obtained by photoluminescence spectroscopy for compositional testing in order to investigate the relationship between the temperature field distribution at the solid-liquid interface and the macroscopic segregation behavior of Zn components.It is found that the temperature gradient distribution on both sides of the solid-liquid interface significantly influences the shape selection and stability of the solidification interface during the crystal growth process,and a larger temperature gradient on the solid-phase side contributes helps to achieve stable crystal growth at the convex interface,thereby increasing the likelihood of growing single crystals.关键词
碲锌镉晶体/数值模拟/晶体生长/界面形状/界面稳定性/宏观偏析Key words
CZT crystal/numerical modeling/crystal growth/interface shape/interface stability/macro-segregation分类
数理科学引用本文复制引用
曹聪,刘江高,范叶霞,李振兴,周振奇,马启司,牛佳佳..碲锌镉晶体生长温度梯度与界面形状稳定性关系的研究[J].人工晶体学报,2024,53(4):641-648,8.
