Physics-based generation of gamma-ray response functions for CDZNTE detectors

Prettyman, T. H.; Cooper, C.; Luke, P.N.; Russo, P.A.; Amman, M.; Mercer, D.

doi:10.2172/527538

Cited by 5 publications

(1 citation statement)

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“…We first suspected surfaces and contacts had a significant influence on internal electric fields when we attempted to model pulse height spectra for coplanar grid detectors. 2 Because the carrier concentration in bulk CdZnTe material is low (<1×10 6 cm -3 ), we assumed that the space charge density was negligible throughout the volume of the device. We found that this assumption grossly underestimated charge collection by the biased anode electrodes in coplanar grid detectors, leading to inaccurate simulations of pulse height spectra.…”

Section: Introductionmentioning

confidence: 99%

<title>Effect of surfaces on the performance of CdZnTe detectors</title>

et al. 2001

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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 affected by the conductivity of the surface.

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Section: Introductionmentioning

confidence: 99%