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Proceedings Paper

Effect of surfaces on the performance of CdZnTe detectors
Author(s): 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
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Paper 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.

Paper Details

Date Published: 18 December 2001
PDF: 9 pages
Proc. SPIE 4507, Hard X-Ray and Gamma-Ray Detector Physics III, (18 December 2001); doi: 10.1117/12.450758
Show Author Affiliations
Thomas H. Prettyman, Los Alamos National Lab. (United States)
Frank P. Ameduri, Los Alamos National Lab. (United States)
Arnold Burger, Fisk Univ. (United States)
J. C. Gregory, Univ. of Alabama in Huntsville (United States)
Mark A. Hoffbauer, Los Alamos National Lab. (United States)
P. R. Majerus, Los Alamos National Lab. (United States)
Daniel B. Reisenfeld, Los Alamos National Lab. (United States)
Stephen E. Soldner, eV Products (United States)
Csaba Szeles, eV Products (United States)


Published in SPIE Proceedings Vol. 4507:
Hard X-Ray and Gamma-Ray Detector Physics III
Ralph B. James, Editor(s)

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