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Chinese Journal of Space Science ›› 2018, Vol. 38 ›› Issue (2): 234-238.doi: 10.11728/cjss2018.02.234

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Growth of ZnTe Crystal in Microgravity on Tiangong-2 Spaceshipormalsize

LU Ye, WANG Reng, DU Yunchen, JIAO Cuiling, LI Xiangyang   

  1. Key Laboratory of Infrared Imaging Materials and Detectors, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083
  • Received:2017-08-22 Revised:2018-01-11 Online:2018-03-15 Published:2018-03-09

Abstract:

Zinc telluride crystal was grown by Te-solvent method in microgravity on Tiangong-2 spaceship in 2016. The growth temperature is 800℃, and the growth rate is 0.5mm·h-1. A ground-truth experiment was performed following the space experiment, and a comparison between the two samples was studied. An orange ZnTe crystal (its size is about 10mm×6mm×2mm) can be found in the space sample. It is shown that the crystal size of space sample is larger than that of the ground sample. Because of the capillary phenomenon in microgravity, Te and ZnTe film were grown at the surface of the silicon rod of the space sample. However, a little bit of gaseous product was found at the ground sample. This result underlines the importance of microgravity for crystal growth of Group Ⅱ~VI semiconductor material. It gives the positive guidance on the growth of infrared semiconductor materials on ground such as HgCdTe, CdZnTe and ZnTe.

Key words: Zinc telluride, Microgravity, Tiangong-2 spaceship, Te-solvent method

CLC Number: