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Article
Open AccessRole of selenium addition to CdZnTe matrix for room-temperature radiation detector applications
Because of its ideal band gap, high density and high electron mobility-lifetime product, cadmium zinc telluride (CdZnTe or CZT) is currently the best room-temperature compound-semiconductor X- and gamma-ray de...
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Article
Open AccessNovel ZnO:Al contacts to CdZnTe for X- and gamma-ray detectors
CdZnTe (CZT) has made a significant impact as a material for room-temperature nuclear-radiation detectors due to its potential impact in applications related to nonproliferation, homeland security, medical ima...
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Article
Analysis of Defects on Chemically-Treated CdZnTe Surfaces
In this work, we focused on investigating the various defects that extend into the near-surface region of CdZnTe (CZT) crystals, and on exploring processing techniques for producing a smooth, non-conductive su...
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Article
Spectroscopic properties of large-volume virtual Frisch-grid CdMnTe detectors
CdMnTe(CMT) is a promising alternative material for use as a room-temperature radiation detector. Frisch-grid detectors have a simple configuration and outstanding spectral performance compared with other sing...
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Article
Long-term stability of ammonium-sulfide- and ammonium-fluoride-passivated CdMnTe detectors
We evaluated the long-term stability of CdMnTe (CMT) detectors treated with ammonium-saltbased passivants. Passivation improved the detector’s stability and reduced the degradation of its energy resolution wit...
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Article
Empirical Correlations Between the Arrhenius’ Parameters of Impurities’ Diffusion Coefficients in CdTe Crystals
Understanding of self- and dopant-diffusion in semiconductor devices is essential to our being able to assure the formation of well-defined doped regions. In this paper, we compare obtained in the literature u...
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Article
Topographic Evaluation of the Effect of Passivation in Improving the Performance of CdZnTe Detectors
Surface passivation reportedly is an effective technique for controlling surface leakage current and its related electronic noise. Several chemical agents have been effectively used for passivating cadmium zin...
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Article
Novel Approach to Surface Processing for Improving the Efficiency of CdZnTe Detectors
We emphasize an improvement of the surface processing procedures for cadmium zinc telluride (CZT) detectors, which is one of the principal problems limiting the technology. A rough surface enhances the leakage...
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Article
Low-Temperature Photoluminescence Study of CdTe:In Crystals Annealed in Molten Bismuth
We used a low-temperature photoluminescence (PL) technique to investigate CdTe:In crystals after annealing in molten bismuth (Bi). The two annealed samples showed different resistivities after the treatment. F...
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Article
New insight into the 1.1-eV trap level in CdTe-based semiconductor
We investigated trap levels in detector-grade CdZnTe (CZT) material grown by using three different methods, viz, the Bridgman, traveling heater method (THM), and high-pressure Bridgman method (HPB), by current...
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Article
Investigation of Structural Defects in CdZnTe Detector-Grade Crystals
We investigated structural defects in CdZnTe detector-grade crystals grown under different conditions. Here, we report our findings from high-resolution electron microscopy [transmission electron microscopy (T...
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Article
Post-growth Annealing of Cadmium Zinc Telluride Crystals for Room-Temperature Radiation Detectors
We investigated the effects of post-growth annealing on cadmium zinc telluride crystals intended for use as room-temperature radiation detectors. Annealing under Cd vapor effectively eliminated Te inclusions. ...
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Article
Point Defects in Pb-, Bi-, and In-Doped CdZnTe Detectors: Deep-Level Transient Spectroscopy (DLTS) Measurements
We studied, by current deep-level transient spectroscopy (I-DLTS), point defects induced in CdZnTe detectors by three dopants: Pb, Bi, and In. Pb-doped CdZnTe detectors have a new acceptor trap at around 0.48 ...
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Article
Internal Electric Field Behavior of Cadmium Zinc Telluride Radiation Detectors Under High Carrier Injection
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) det...
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Article
Growth of detector-grade CZT by Traveling Heater Method (THM): An advancement
In this present work we report the growth of Cd0.9Zn0.1Te doped with In by a modified THM technique. It has been demonstrated that by controlling the microscopically flat growth interface, the size distribution a...
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Article
Improvement of CdMnTe Detector Performance by MnTe Purification
Residual impurities in manganese (Mn) are a big obstacle to obtaining high- performance CdMnTe (CMT) X-ray and gamma-ray detectors. Generally, the zone-refining method is an effective way to improve the materi...
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Article
Effects of dislocations and sub-grain boundaries on X-ray response maps of CdZnTe radiation detectors
The imperfect quality of CdZnTe (CZT) crystals for radiation detectors seriously diminishes their suitability for different applications. Dislocations and other dislocation-related defects, such as sub-grain b...
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Article
Study of Structural Defects in CdZnTe Crystals by High Resolution Electron Microscopy
We investigated defects in CdZnTe crystals produced from various conditions and their impact on fabricated devices. In this study, we employed transmission and scanning transmission electron microscope (TEM an...
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Article
Point Defects in CdZnTe Crystals Grown by Different Techniques
We studied, by current deep-level transient spectroscopy (I-DLTS), point defects in CdZnTe detectors grown by different techniques. We identified 12 different traps with energy levels from 7 meV to 1.1 eV. Alt...
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Article
Time-Resolved and Post-Irradiation Studies of the Interaction of High-Power Pulsed Microwave Radiation with Silicon
We have measured the microwave-induced damage to the near-surface region of silicon for 1.9-μs pulses at a frequency of 2.856 GHz and a pulse power of up to 7.2 MW. Rectangular samples were irradiated in a tes...
