Abstract
The behavior of the internal electric field of nuclear-radiation detectors substantially affects detector performance. We investigated the distribution of the internal field in cadmium zinc telluride (CZT) detectors under high carrier injection. We noted the build-up of a space-charge region near the cathode that produces a built-in field opposing the applied field. Its presence entails the collapse of the electric field in the rest of the detector, other than the portion near the cathode. Such a space-charge region originates from serious hole trapping in CZT. The device's operating temperature greatly affects the width of the space-charge region. With increasing temperature from 5°C to 35°C, its width expanded from about one-sixth to one-half of the total depth of the detector.
Original language | English |
---|---|
Pages (from-to) | 1689-1692 |
Number of pages | 4 |
Journal | Journal of Electronic Materials |
Volume | 40 |
Issue number | 8 |
DOIs | |
Publication status | Published - 2011 Aug |
Externally published | Yes |
Keywords
- CZT
- Pockels effect
- electric field
- hole trapping
- polarization
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering
- Materials Chemistry