Role of selenium addition to CdZnTe matrix for room-temperature radiation detector applications

Roy, Utpal; Camarda, G. S.; Cui, Yonggang; Gul, R.; Hossain, Anwar; Yang, Ge; Zázvorka, Jakub; Dědič, V.; Franc, J.; James, R. B.

doi:10.1038/s41598-018-38188-w

Cited by 74 publications

(47 citation statements)

References 32 publications

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“…Optical photograph and X-ray topographic image on a 2-inch diameter Cd0.9Zn0.1Te0.93Se0.07 grown by THM showed the complete absence of sub-grain boundary networks, and there were very few sub-grain boundaries, much less than often present in CZT [31]. The average concentration of Te inclusions (~2.5 x 10 5 cm -3 ) was found to be about one order of magnitude less than that in CZT grown by a similar technique [31]. This evidence of better material quality often translates to higher detector performance, increased detector yield and a lower cost of production.…”

Section: Introductionmentioning

confidence: 95%

“…The indium and Te were also of 6N purity. The details of the growth technique are described in [31].…”

Section: A Detector Materials and Fabricationmentioning

confidence: 99%

“…The key difference between CZTS and its major counterparts, CdTe, and CZT, is the ability of Se to effectively prevent sub-grain boundary networks from being formed during the crystal growth process [32]. The segregation coefficient of Zn in CdTe matrix is >1 and is significantly reduced by Se [31]. Thus, the presence of Se leads to better crystal compositional uniformity, and hence higher yield of defect-free regions in the ingot and better detector resolution.…”

Section: B Comrarison Of Czts To Cztmentioning

confidence: 99%

“…Our recent studies have shown that CZTS has the advantage of lowering the cost of room-temperature nuclear detection devices. In particular, the addition of Se to the CZT matrix significantly reduced Zn segregation, limited the formations of sub-grain boundaries and their networks, limited the formation of Te inclusions and precipitates, and improved the compositional homogeneity of the CZTS matrix [31]. Optical photograph and X-ray topographic image on a 2-inch diameter Cd0.9Zn0.1Te0.93Se0.07 grown by THM showed the complete absence of sub-grain boundary networks, and there were very few sub-grain boundaries, much less than often present in CZT [31].…”

Section: Introductionmentioning

confidence: 99%

“…In particular, the addition of Se to the CZT matrix significantly reduced Zn segregation, limited the formations of sub-grain boundaries and their networks, limited the formation of Te inclusions and precipitates, and improved the compositional homogeneity of the CZTS matrix [31]. Optical photograph and X-ray topographic image on a 2-inch diameter Cd0.9Zn0.1Te0.93Se0.07 grown by THM showed the complete absence of sub-grain boundary networks, and there were very few sub-grain boundaries, much less than often present in CZT [31]. The average concentration of Te inclusions (~2.5 x 10 5 cm -3 ) was found to be about one order of magnitude less than that in CZT grown by a similar technique [31].…”

Section: Introductionmentioning

confidence: 99%

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Optimizing CdZnTeSe Frisch-Grid Nuclear Detector for Gamma-Ray Spectroscopy

et al. 2020

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Wide bandgap semiconductor materials capable of detecting X-rays and gamma-rays at room temperature without cryogenic cooling have great advantages that include portability and wide-area deployment in nuclear and radiological threat defense. Additional major applications include medical imaging, spectroscopy, and astrophysics. Most current room-temperature ionizing radiation detector devices are fabricated from cadmium telluride (CdTe) and cadmium zinc telluride (CdZnTe). Cadmium zinc telluride selenide (CdZnTeSe or CZTS) can be grown with high crystal yield compared to CdTe and CdZnTe. Thus, CZTS has the advantage of lowering the cost of room-temperature nuclear detectors. Thick CdTe-based detectors are prone to the trapping of charge carriers, thus limiting energy resolution and efficiency. A Frisch-Grid configuration helps to solve this problem. This research is focused on optimizing the Frisch-grid configuration for a CZTS detector. The CZTS was grown by traveling heater method. Infrared images of the CZTS matrix largely showed the absence of tellurium inclusions. The resistivity of the CZTS obtained from a current-voltage plot is of the order of 10 10 Ω.cm. The charge-transport characterized by measuring the electron mobility-lifetime product is 4.7 x 10-3 cm 2 /V. Detector resolution was measured for various Frischring widths. For a 4.8 x 4.9 x 9.7 mm 3 detector, the best Frisch-ring widths were found to be 3-4 mm. A detector resolution of 1.35% full-width-at-half-maximum was obtained for the 3-mm width at-2300 V bias voltage for the 662-keV gamma peak of 137 Cs. A resolution of 1.36% was obtained for the 4-mm width at-1800 V applied bias. INDEX TERMS CdZnTeSe detectors, detector resolution, Frisch-grid, gamma-ray detector, nuclear radiation detector, traveling heater method, X-ray detector.

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Section: Introductionmentioning

confidence: 95%

“…The indium and Te were also of 6N purity. The details of the growth technique are described in [31].…”

Section: A Detector Materials and Fabricationmentioning

confidence: 99%

Section: B Comrarison Of Czts To Cztmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optimizing CdZnTeSe Frisch-Grid Nuclear Detector for Gamma-Ray Spectroscopy

et al. 2020

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Metal Halide Perovskites for High‐Energy Radiation Detection

et al. 2020

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Metal halide perovskites (MHPs) have emerged as a frontrunner semiconductor technology for application in third generation photovoltaics while simultaneously making significant strides in other areas of optoelectronics. Photodetectors are one of the latest additions in an expanding list of applications of this fascinating family of materials. The extensive range of possible inorganic and hybrid perovskites coupled with their processing versatility and ability to convert external stimuli into easily measurable optical/electrical signals makes them an auspicious sensing element even for the high-energy domain of the electromagnetic spectrum. Key to this is the ability of MHPs to accommodate heavy elements while being able to form large, high-quality crystals and polycrystalline layers, making them one of the most promising emerging X-ray and-ray detector technologies. Here, the fundamental principles of high-energy radiation detection are reviewed with emphasis on recent progress in the emerging and fascinating field of metal halide perovskite-based X-ray and-ray detectors. The review starts with a discussion of the basic principles of high-energy radiation detection with focus on key performance metrics followed by a comprehensive summary of the recent progress in the field of perovskite-based detectors. The article concludes with a discussion of the remaining challenges and future perspectives.

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The Incorporation of CsCu₂I₃ Nanocrystals into Polydimethylsiloxane Matrix for X‐ and γ‐Ray Scintillators

Haposan,

Makowski,

Kowal

et al. 2024

Physica Rapid Research Ltrs

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CsCu2I3 CsCu2I3 lead‐free nanocrystals (NCs) have recently garnered significant interest for their outstanding optical and scintillation characteristics, particularly for X‐ray imaging applications. In this study, CsCu2I3 NCs are mixed with polydimethylsiloxane (PDMS) resin in the form of a pellet to protect against environmental factors such as moisture. The resulting sample exhibits a light yield of up to 2 ph keV−1 and an excellent energy resolution of 13% for γ‐ray excitation at 662 keV at room temperature. Additionally, the CsCu2I3 NCs–PDMS resin shows no afterglow and has a negligible trap density. Herein, high stability at low irradiation intensities and reasonable stability at higher intensities are demonstrated. Moreover, the sample features a fast component scintillation decay times of 3.55 ns, which is slightly faster than that of (BZA)2PbBr4. This outcome possesses promising combination in designing lightweight and flexible hybrid PDMS‐based hybrid materials scintillators. These scintillation properties of CsCu2I3 NCs–PDMS can be a promising candidate for affordable and flexible screens for X‐ and γ‐ray photon‐counting computed tomography.

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Role of selenium addition to CdZnTe matrix for room-temperature radiation detector applications

Cited by 74 publications

References 32 publications

Optimizing CdZnTeSe Frisch-Grid Nuclear Detector for Gamma-Ray Spectroscopy

Optimizing CdZnTeSe Frisch-Grid Nuclear Detector for Gamma-Ray Spectroscopy

Metal Halide Perovskites for High‐Energy Radiation Detection

The Incorporation of CsCu₂I₃ Nanocrystals into Polydimethylsiloxane Matrix for X‐ and γ‐Ray Scintillators

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Role of selenium addition to CdZnTe matrix for room-temperature radiation detector applications

Cited by 74 publications

References 32 publications

Optimizing CdZnTeSe Frisch-Grid Nuclear Detector for Gamma-Ray Spectroscopy

Optimizing CdZnTeSe Frisch-Grid Nuclear Detector for Gamma-Ray Spectroscopy

Metal Halide Perovskites for High‐Energy Radiation Detection

The Incorporation of CsCu2I3 Nanocrystals into Polydimethylsiloxane Matrix for X‐ and γ‐Ray Scintillators

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The Incorporation of CsCu₂I₃ Nanocrystals into Polydimethylsiloxane Matrix for X‐ and γ‐Ray Scintillators