CdTexSe1-x: a potential candidate for room-temperature radiation detector applications

U. N. Roy; A. E. Bolotnikov; G. S. Camarda; Y. Cui; A. Hossain; G. Yang; R. Tappero; R. B. James

doi:10.1117/12.2063174

5 September 2014 CdTe_xSe_1-x: a potential candidate for room-temperature radiation detector applications

U. N. Roy, A. E. Bolotnikov, G. S. Camarda, Y. Cui, A. Hossain, G. Yang, R. Tappero, R. B. James

Proceedings Volume 9213, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XVI; 92130F (2014) https://doi.org/10.1117/12.2063174
Event: SPIE Optical Engineering + Applications, 2014, San Diego, California, United States

Abstract

CdTe_xSe_1-x, with its several advantages over the conventional CdZnTe (CZT) material, offers potential as a roomtemperature radiation detector. Its main advantage is the near-unity segregation coefficient of Se in the CdTe matrix that results in higher compositional homogeneity of the grown ingot. In this paper, we discussed the growth of CdTeSe crystals by various techniques, such as the Traveling Heater method and the Vertical Bridgman technique. We analyzed the different defects in the grown ingots, including Te inclusions/precipitations, sub-grain boundaries and dislocation networks, and studied their effects on the materials’ charge-transport characteristics. Our experimental findings demonstrated several advantages of CdTeSe over CZT, in addition to the near-unity segregation coefficient of Se, including lower concentrations of Te-inclusions/precipitations and sub-grain boundaries and a higher degree of uniformity. Our findings on its charge-transport characteristics also are very encouraging.

Citation Download Citation

U. N. Roy, A. E. Bolotnikov, G. S. Camarda, Y. Cui, A. Hossain, G. Yang, R. Tappero, and R. B. James "CdTe_xSe_1-x: a potential candidate for room-temperature radiation detector applications", Proc. SPIE 9213, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XVI, 92130F (5 September 2014); https://doi.org/10.1117/12.2063174

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