EFFECT OF TE PRECIPITATES ON THE PERFORMANCE OF CDZNTE DETECTORS.
A recent study of long-drift CdZnTe (CZT) Frisch-ring detectors showed that fluctuations of the collected charge (and device response) depend on the device dimensions and the concentration of Te precipitates in the material. This observation, which could be explained as the cumulative effect of precipitates, led to the investigation of thin (1 mm) planar detectors, where the effects of precipitates can be more clearly ascertained. To perform the investigation, a measurement facility was developed that allowed for high-resolution spatial mapping of the performance of CZT devices. New measurements emerging from this facility provided the first detailed comparisons of the micro-scale X-ray maps and infrared microscopy images for thin CZT samples. Analysis of the data showed conclusively that local deteriorations of device response fully correlate with Te precipitates seen in the IR images. Effects of surface processing conditions on the detector response were also clearly observed.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- DOE/NNSA
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 860508
- Report Number(s):
- BNL-75097-2005-CP; R&D Project: 03108/03109; YN0100000; TRN: US0504918
- Resource Relation:
- Conference: 2005 U.S. WORKSHOP ON THE PHYSICS AND CHEMISTRY OF II-IV MATERIALS; BOSTON, MA; 20050920 through 20050922
- Country of Publication:
- United States
- Language:
- English
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