Detector performance of ammonium-sulfide-passivated CdZnTe and CdMnTe materials

K. H. Kim; A. E. Bolotnikov; G. S. Camarda; L. Marchini; G. Yang; A. Hossain; Y. Cui; L. Xu; R. B. James

doi:10.1117/12.861543

27 August 2010 Detector performance of ammonium-sulfide-passivated CdZnTe and CdMnTe materials

K. H. Kim, A. E. Bolotnikov, G. S. Camarda, L. Marchini, G. Yang, A. Hossain, Y. Cui, L. Xu, R. B. James

Proceedings Volume 7805, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XII; 78051U (2010) https://doi.org/10.1117/12.861543
Event: SPIE Optical Engineering + Applications, 2010, San Diego, California, United States

Abstract

Dark currents, including those in the surface and bulk, are the leading source of electronic noise in X-ray and gamma detectors, and are responsible for degrading a detector's energy resolution. The detector material itself determines the bulk leakage current; however, the surface leakage current is controllable by depositing appropriate passivation layers. In previous research, we demonstrated the effectiveness of surface passivation in CZT (CdZnTe) and CMT (CdMnTe) materials using ammonium sulfide and ammonium fluoride. In this research, we measured the effect of such passivation on the surface states of these materials, and on the performances of detectors made from them.

Citation Download Citation

K. H. Kim, A. E. Bolotnikov, G. S. Camarda, L. Marchini, G. Yang, A. Hossain, Y. Cui, L. Xu, and R. B. James "Detector performance of ammonium-sulfide-passivated CdZnTe and CdMnTe materials", Proc. SPIE 7805, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XII, 78051U (27 August 2010); https://doi.org/10.1117/12.861543

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