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 |
Bibliographical note
Funding Information:This work was supported by US Department of Energy, Office of Nonproliferation Research and Development, NA-22. The manuscript has been authored by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH1-886 with the US Department of Energy.
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