Observations on Nanoscale Te Precipitates in CdZnTe Crystals Grown by the Traveling Heater Method Using High Resolution Transmission Electron Microscopy
Boru Zhou,
Wanqi Jie,
Tao Wang,
Zongde Kou,
Dou Zhao,
Liying Yin,
Fan Yang,
Shouzhi Xi,
Gangqiang Zha,
Ziang Yin
Affiliations
Boru Zhou
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China
Wanqi Jie
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China
Tao Wang
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China
Zongde Kou
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China
Dou Zhao
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China
Liying Yin
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China
Fan Yang
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China
Shouzhi Xi
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China
Gangqiang Zha
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China
Ziang Yin
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China
Te precipitates in CdZnTe (CZT) crystals grown by the traveling heater method (THM) are investigated using high-resolution transmission electron microscopy (HRTEM). The results show that in THM-grown CZT crystals, Te precipitates are less than 10 nm in size—much smaller than those in Bridgman-grown CZT. They have hexagonal structure and form a coherent interface with zinc blend structure CZT matrix in the orientation relationship [ 1 ¯ 12 ] M / / [ 0001 ] P and ( 1 1 ¯ 1 ) M / / ( 1 ¯ 100 ) P . A ledge growth interface with the preferred orientation along the [ 1 1 ¯ 1 ] M and [ 110 ] M was found near Te precipitates. The growth and nucleation mechanism of Te precipitates are also discussed.
