Controlling Te inclusion during direct mixed solution growth of large size CdZnTe crystal

Song Zhang; Cheng Wang; Bo Zhao; Hui Zhang; Lili Zheng

doi:10.1117/12.2327047

13 September 2018 Controlling Te inclusion during direct mixed solution growth of large size CdZnTe crystal

Song Zhang, Cheng Wang, Bo Zhao, Hui Zhang, Lili Zheng

Proceedings Volume 10762, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XX; 107620V (2018) https://doi.org/10.1117/12.2327047
Event: SPIE Optical Engineering + Applications, 2018, San Diego, California, United States

Abstract

CdZnTe (CZT) is proved to be a perfect material during the fabrication of detectors for X-ray and Gamma ray. However, Te inclusion is one of the main defects in CZT crystal which influences the electrical and spectroscopic properties of the detectors. This paper presents optimization of hot zone design and operating conditions by direct mixed solution growth (DMSG) method in order to reduce the formation of Te inclusion. The growth temperature is 890°C and the growth rate is 5mm/day. With the temperature gradient increased from 20K/cm to 40K/cm, the number of Te inclusion is reduced sharply while the size of Te inclusion is still large. When accelerated crucible rotation technique (ACRT) is introduced, the size of Te inclusion is reduced significantly. Large-size Te inclusion almost disappears under IR imaging. The density of Te inclusion which is larger than 1×10⁴cm³. The resistivity of the as grown crystal is higher than 10¹⁰Ωxcm. At last, the influence of ACRT sequences on Te formation is discussed.

Citation Download Citation

Song Zhang, Cheng Wang, Bo Zhao, Hui Zhang, and Lili Zheng "Controlling Te inclusion during direct mixed solution growth of large size CdZnTe crystal", Proc. SPIE 10762, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XX, 107620V (13 September 2018); https://doi.org/10.1117/12.2327047

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available