原位退火对碲锌镉晶体第二相夹杂缺陷的影响 |
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引用本文: | 袁绶章,赵文,孔金丞,王静宇,姜军,赵增林,姬荣斌.原位退火对碲锌镉晶体第二相夹杂缺陷的影响[J].红外技术,2021,43(7):615-621. |
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作者姓名: | 袁绶章 赵文 孔金丞 王静宇 姜军 赵增林 姬荣斌 |
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作者单位: | 昆明物理研究所,云南 昆明 650223 |
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摘 要: | 采用传统布里奇曼法生长碲锌镉晶体,在配料过程中添加适当过量的Cd,并在晶体生长结束阶段的降温过程中加入晶锭原位退火工艺,晶体的第二相夹杂缺陷得到了有效抑制。根据晶体第二相夹杂缺陷的形成机理,结合热扩散理论和碲锌镉晶体的P-T相图,研究了退火温度对晶体第二相夹杂缺陷密度和粒度(尺寸)的影响,获得了抑制碲锌镉晶体第二相夹杂缺陷的退火条件。利用优化的退火条件制备碲锌镉晶体,晶体第二相夹杂缺陷的尺寸小于10 μm,密度小于250 cm-2。
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关 键 词: | 碲锌镉 第二相夹杂缺陷 晶锭原位退火 |
收稿时间: | 2021-05-03 |
Effect of in-Situ Post-annealing on the Second Phase Inclusion Defects |
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Affiliation: | Kunming Institute of Physics, Kunming 650223, China |
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Abstract: | Second-phase-inclusion defects in Bridgman-grown CdZnTe crystals were decreased via post-growth in-situ annealing combined with excess Cd in CdZnTe ingots. Based on the formation mechanism of the second-phase-inclusion defects in Bridgman-grown CdZnTe, the relationship between second-phase-inclusion defects and annealing temperature was studied. The size of second-phase-inclusion defects was reduced to less than 10 μm and their density to less than 250 cm-2 in CdZnTe at an optimized in-situ post-annealing temperature. |
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