Effect of surfaces on the performance of CdZnTe detectors

Thomas H. Prettyman; Frank P. Ameduri; Arnold Burger; J. C. Gregory; Mark A. Hoffbauer; P. R. Majerus; Daniel B. Reisenfeld; Stephen E. Soldner; Csaba Szeles

doi:10.1117/12.450758

18 December 2001 Effect of surfaces on the performance of CdZnTe detectors

Thomas H. Prettyman, Frank P. Ameduri, Arnold Burger, J. C. Gregory, Mark A. Hoffbauer, P. R. Majerus, Daniel B. Reisenfeld, Stephen E. Soldner, Csaba Szeles

Author Affiliations +

Proceedings Volume 4507, Hard X-Ray and Gamma-Ray Detector Physics III; (2001) https://doi.org/10.1117/12.450758
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

Surface processing plays a major role in manufacturing CdZnTe semiconductor devices used for radiation detection. We are conducting a thorough, systematic study of surfaces and contacts and their effect on charge transport and signal formation in CdZnTe devices. We are investigating wet chemical processing techniques as well as treatment of surfaces with energetic neutral atoms. Our goal is to develop and implement improved surface treatment methods and device manufacturing techniques for large-volume CdZnTe detectors. In addition, we will determine how surfaces and electrical contacts affect the performance of CdZnTe devices used for radiation detection. In this paper, we will show how surface electronic properties influence carrier transport and signal formation in devices designed to simulate coplanar grid detectors. By altering the surface using a wet chemical process, we will show that charge collection is significantly effected by the conductivity of the surface.

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Thomas H. Prettyman, Frank P. Ameduri, Arnold Burger, J. C. Gregory, Mark A. Hoffbauer, P. R. Majerus, Daniel B. Reisenfeld, Stephen E. Soldner, and Csaba Szeles "Effect of surfaces on the performance of CdZnTe detectors", Proc. SPIE 4507, Hard X-Ray and Gamma-Ray Detector Physics III, (18 December 2001); https://doi.org/10.1117/12.450758

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