Large Area &lt;formula formulatype="inline"&gt;&lt;tex Notation="TeX"&gt;${\rm Cd}_{0.9}{\rm Zn}_{0.1}{\rm Te}$&lt;/tex&gt;&lt;/formula&gt; Pixelated Detector: Fabrication and Characterization

Chaudhuri, Sandeep K.; Nguyen, Khai V.; Pak, Rahmi O.; Matei, Liviu; Buliga, Vladimir; Groza, Michael; Bürger, A.; Mandal, Krishna C.

doi:10.1109/tns.2014.2307861

Cited by 31 publications

(6 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…ERPC systems based on pixelated CZT detectors offer modest energy resolution at high fluxes (> 10 6 photons mm À2 s À1 ), typically of the order of 10-20% at 60 keV (Barber et al, 2015;Brambilla et al, 2009;Baumer et al, 2008;Greenberg et al, 2016), and advances in both the CZT crystal growth and the device technology are required. Great efforts have been made on the development of CZT detectors based on spectroscopic grade crystals and characterized by electrical contacts (quasi-ohmic contacts) with low leakage currents (Auricchio et al, 2011;Bell et al, 2015;Chen et al, 2007;Park et al, 2008;Chaudhuri et al, 2014;Szeles et al, 2008;Abbene et al, 2016;Zappettini et al, 2009). Currently, CZT crystals with excellent charge transport properties ( e e > 10 À2 cm 2 V À1 ) are produced by a Canadian company (Redlen Technologies, Victoria BC, Canada) using the travelling heater method (THM) growth technique (Awadalla et al, 2014;Chen et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Development of new CdZnTe detectors for room-temperature high-flux radiation measurements

et al. 2017

View full text Add to dashboard Cite

Recently, CdZnTe (CZT) detectors have been widely proposed and developed for room-temperature X-ray spectroscopy even at high fluxes, and great efforts have been made on both the device and the crystal growth technologies. In this work, the performance of new travelling-heater-method (THM)-grown CZT detectors, recently developed at IMEM-CNR Parma, Italy, is presented. Thick planar detectors (3 mm thick) with gold electroless contacts were realised, with a planar cathode covering the detector surface (4.1 mm × 4.1 mm) and a central anode (2 mm × 2 mm) surrounded by a guard-ring electrode. The detectors, characterized by low leakage currents at room temperature (4.7 nA cm at 1000 V cm), allow good room-temperature operation even at high bias voltages (>7000 V cm). At low rates (200 counts s), the detectors exhibit an energy resolution around 4% FWHM at 59.5 keV (Am source) up to 2200 V, by using commercial front-end electronics (A250F/NF charge-sensitive preamplifier, Amptek, USA; nominal equivalent noise charge of 100 electrons RMS). At high rates (1 Mcounts s), the detectors, coupled to a custom-designed digital pulse processing electronics developed at DiFC of University of Palermo (Italy), show low spectroscopic degradations: energy resolution values of 8% and 9.7% FWHM at 59.5 keV (Am source) were measured, with throughputs of 0.4% and 60% at 1 Mcounts s, respectively. An energy resolution of 7.7% FWHM at 122.1 keV (Co source) with a throughput of 50% was obtained at 550 kcounts s (energy resolution of 3.2% at low rate). These activities are in the framework of an Italian research project on the development of energy-resolved photon-counting systems for high-flux energy-resolved X-ray imaging.

show abstract

Section: Introductionmentioning

confidence: 99%

Development of new CdZnTe detectors for room-temperature high-flux radiation measurements

et al. 2017

View full text Add to dashboard Cite

show abstract

“…At present, semiconductor films used for direct detection include silicon (Si), amorphous selenium (a-Se), mercury iodide (HgI 2 ) and cadmium zinc telluride (CZT). [26][27][28][29] Although people have made great efforts to improve the performance of traditional semiconductors, there are still some shortcomings that hinder their further application. For example, due to its small atomic number (Z = 14), Si shows smaller X-ray absorption capacity which limits detection efficiency.…”

Section: Introductionmentioning

confidence: 99%

A Review on Lead‐Free Perovskites for X‐Ray Detection and Imaging

Zhang

Meng

et al. 2023

Cryst. Res. Technol.

View full text Add to dashboard Cite

Recently, perovskites have shown great promise as a semiconductor material with the advantages of low-temperature fabrication, controllable band gap, and high carrier lifetime. In the field of X-ray detection, a number of workers have developed green and stable and efficient lead-free halide chalcogenides in pursuit of stable performance and biological safety. This article has done the following three works: It introduces the basic principles of X-ray detection briefly. The outstanding works that have been done are summarized in terms of sensitivity, signal-to-noise ratio, and detection limit, and their laws are summarized. The optoelectronic properties of lead-free halide perovskites are summarized, the prospects of lead-free perovskites in the field of X-ray detection are foreseen.

show abstract

“…In addition, most of the organic photodetectors have to couple with a scintillator layer for X‐ray photons detection . Several kinds of inorganic semiconductors (Si, HPGe, GaAs and Cd 1– x Zn x Te) provide excellent detection capability and long‐term stability, while they are normally rigid and fragile . However, lead iodide (PbI 2 ) crystal is an exception.…”

Section: Introductionmentioning

confidence: 99%

Flexible X‐ray detector based on sliced lead iodide crystal

Sun

Zhao

Yang

et al. 2017

Physica Rapid Research Ltrs

View full text Add to dashboard Cite

A promising flexible X‐ray detector based on inorganic semiconductor PbI2 crystal is reported. The sliced crystals mechanically cleaved from an as‐grown PbI2 crystal act as the absorber directly converting the impinging X‐ray photons to electron hole pairs. Due to the ductile feature of the PbI2 crystal, the detector can be operated under a highly curved state with the strain on the top surface up to 1.03% and still maintaining effective detection performance. The stable photocurrent and fast response were obtained with the detector repeated bending to a strain of 1.03% for 100 cycles. This work presents an approach for developing efficient and cost‐effective PbI2‐based flexible X‐ray detector. Photocurrent responses of the flexible PbI2 X‐ray detector with the strain on the top surface up to 1.03% proposed in this work with the cross sectional structure and curved detector photograph as insets. (© 2016 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim)

show abstract

Large Area <formula formulatype="inline"><tex Notation="TeX">${\rm Cd}_{0.9}{\rm Zn}_{0.1}{\rm Te}$</tex></formula> Pixelated Detector: Fabrication and Characterization

Cited by 31 publications

References 24 publications

Development of new CdZnTe detectors for room-temperature high-flux radiation measurements

Development of new CdZnTe detectors for room-temperature high-flux radiation measurements

A Review on Lead‐Free Perovskites for X‐Ray Detection and Imaging

Flexible X‐ray detector based on sliced lead iodide crystal

Contact Info

Product

Resources

About