Paper Title:
Negative Capacitance Phenomena in CZT Room Temperature Radiation Detectors
  Abstract

CdZnTe , Cadmium zinc telluride (CZT) is an interesting room temperature radiation detector. This research paper is reporting a negative capacitance behavior of CZT detectors at bias voltages around 60V. Initially at 0V, the CZT capacitance is positive and decreases with bias voltage increase. At around 60V, the measured capacitance approaches zero, then with small voltage increase , capacitance value reverses sign and starts to increase in the negative direction with increasing bias voltage . This effect is stable at 100 kHz. The behavior of low and other quality detectors can differ, low quality detectors can show negative capacitance at low bias voltages and low frequencies. The initial explanation of this phenomena is due to non-uniform distribution of impurities inside the bulk material.

  Info
Periodical
Materials Science Forum (Volumes 480-481)
Edited by
A. Méndez-Vilas
Pages
399-404
DOI
10.4028/www.scientific.net/MSF.480-481.399
Citation
M. A. Hassan, "Negative Capacitance Phenomena in CZT Room Temperature Radiation Detectors", Materials Science Forum, Vols. 480-481, pp. 399-404, 2005
Online since
March 2005
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Price
$32.00
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