Journal ArticleDOI
CdZnTe and CdTe materials for X-ray and gamma ray radiation detector applications
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In this paper, the effects of bulk, interface and surface defects on charge transport, charge transport uniformity and device performance are reviewed. And the progress in the crystal growth and device fabrication technologies aiming at reducing the concentration of harmful defects and improving Cd 1-x Zn x Te detector performance is discussed.Abstract:
Good detection efficiency and high energy-resolution make Cadmium Zinc Telluride (CdZnTe) and Cadmium Telluride (CdTe) detectors attractive in many room temperature X-ray and gamma-ray detection applications such as medical and industrial imaging, industrial gauging and non-destructive testing, security and monitoring, nuclear safeguards and non-proliferation, and astrophysics. Advancement of the crystal growth and device fabrication technologies and the reduction of bulk, interface and surface defects in the devices are crucial for the widespread practical deployment of Cd 1-x Zn x Te-based detector technology. Here we review the effects of bulk, interface and surface defects on charge transport, charge transport uniformity and device performance and the progress in the crystal growth and device fabrication technologies aiming at reducing the concentration of harmful defects and improving Cd 1-x Zn x Te detector performance.read more
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Journal ArticleDOI
Sensitive X-ray detectors made of methylammonium lead tribromide perovskite single crystals
Haotong Wei,Yanjun Fang,Yanjun Fang,Padhraic Mulligan,William Chuirazzi,Hong-Hua Fang,Congcong Wang,Benjamin Ecker,Yongli Gao,Yongli Gao,Maria Antonietta Loi,Lei Cao,Jinsong Huang +12 more
TL;DR: In this paper, single-crystal perovskite devices 2-3 mm thick exhibit 16.4% X-ray detection efficiency with sensitivity four times higher than α-Se detectors.
Journal ArticleDOI
Monolithic integration of hybrid perovskite single crystals with heterogenous substrate for highly sensitive X-ray imaging
Wei Wei,Yang Zhang,Qiang Xu,Haotong Wei,Yanjun Fang,Qi Wang,Yehao Deng,Tao Li,Alexei Gruverman,Lei Cao,Jinsong Huang +10 more
TL;DR: In this paper, hybrid perovskite crystals are integrated onto silicon wafers enabling fabrication of an X-ray linear detector array, which may reduce patient dose in medical imaging applications.
Journal ArticleDOI
Dopant compensation in alloyed CH 3 NH 3 PbBr 3-x Cl x perovskite single crystals for gamma-ray spectroscopy
Haotong Wei,Dylan DeSantis,Wei Wei,Yehao Deng,Dengyang Guo,Tom J. Savenije,Lei Cao,Jinsong Huang,Jinsong Huang +8 more
TL;DR: A dopant compensation in alloyed OIHP single crystals is reported to overcome limitations of device noise and charge collection, enabling γ-ray spectrum collection at room temperature.
Journal ArticleDOI
High-performance direct conversion X-ray detectors based on sintered hybrid lead triiodide perovskite wafers
Shreetu Shrestha,Rene Fischer,Gebhard J. Matt,Patrick Feldner,Thilo Michel,Andres Osvet,Ievgen Levchuk,Benoit Merle,Saeedeh Golkar,Haiwei Chen,Sandro Francesco Tedde,Oliver Schmidt,Rainer Hock,Manfred Rührig,Mathias Göken,Wolfgang Heiss,Gisela Anton,Christoph J. Brabec +17 more
TL;DR: Methyl ammonium lead triiodide perovskite wafers for application in direct conversion X-ray detectors are fabricated by a room-temperature sintering process.
Journal ArticleDOI
Highly sensitive X-ray detector made of layered perovskite-like (NH 4 ) 3 Bi 2 I 9 single crystal with anisotropic response
Renzhong Zhuang,Renzhong Zhuang,Xueji Wang,Wenbo Ma,Yuhao Wu,Xu Chen,Longhua Tang,Haiming Zhu,Jiyong Liu,Lingling Wu,Wei Zhou,Xu Liu,Yang Michael Yang +12 more
TL;DR: Li et al. as mentioned in this paper proposed a 2D layered perovskite-like (NH4)3Bi2I9 device that provides unique anisotropic X-ray detecting performance with different crystal directions, effective suppression of ion migration and a low detection limit of 55'nGyair's−1.
References
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Journal ArticleDOI
Single-polarity charge sensing in ionization detectors using coplanar electrodes
TL;DR: In this paper, a new method to preferentially sense the collection of single-polarity charge carriers in ionization detectors is presented, which uses coplanar electrodes to closely emulate the function of Frisch grids commonly employed in gas and liquid ionisation detectors.