Characterization and evaluation of extended defects in CZT crystals for gamma-ray detectors

被引：53

作者：

Bolotnikov, A. E. ^{[1
]}

Camarda, G. S. ^{[1
]}

Cui, Y. ^{[1
]}

Yang, G. ^{[1
]}

Hossain, A. ^{[1
]}

Kim, K. ^{[1
]}

James, R. B. ^{[1
]}

机构：

[1] Brookhaven Natl Lab, Upton, NY 11973 USA

来源：

JOURNAL OF CRYSTAL GROWTH | 2013年 / 379卷

关键词：

Defects; Volume defects; Radiation; Semiconducting materials; TE INCLUSIONS; CDZNTE; PERFORMANCE; GROWTH; CHARGE;

D O I：

10.1016/j.jcrysgro.2013.01.048

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Material homogeneity is critical in achieving high-performance in all types of radiation detectors. This requirement is not inevitably satisfied in today's commercial detector-grade CdZnTe (CZT) material because it contains high concentrations of extended defects, in particular, Te inclusions, dislocation networks, and twin- and subgrain-boundaries that affect the energy resolution and the efficiency of the devices. Defects, such as grain boundaries and cracks that completely block charge-carrier transport are impermissible in CZT radiation-detectors at concentrations exceeding certain threshold values. Our group in Brookhaven National Laboratory (BNL) conducts systematic studies, detailing the roles of crystal defects in CZT detectors and the mechanisms underlying their formation and effects. We employ infrared transmission microscopy, white beam X-ray diffraction topography, and high-spatial-resolution X-ray response mapping to identify particular types of defects and reveal their relationship with the devices' performances. In this article, we summarize some of the most important results that our group obtained over the past 5 years. Published by Elsevier B.V.

引用

页码：46 / 56

页数：11

共 39 条

[1] Electron trapping nonuniformity in high-pressure-Bridgman-grown CdZnTe
Amman, M
Lee, JS
Luke, PN
[J]. JOURNAL OF APPLIED PHYSICS, 2002, 92 (06) : 3198 - 3206
[2] Authier A., 2005, DYNAMICAL THEORY XRA
[3] Thickness scalability of large volume cadmium zinc telluride high resolution radiation detectors
Awadalla, S. A.
Chen, H.
Mackenzie, J.
Lu, P.
Iniewski, K.
Marthandam, P.
Redden, R.
Bindley, G.
He, Z.
Zhang, F.
[J]. JOURNAL OF APPLIED PHYSICS, 2009, 105 (11)
[4] Bale D.S., 2010, J APPL PHYS, V107
[5] Cumulative effects of Te precipitates in CdZnTe radiation detectors
Bolotnikov, A. E.
Camarda, G. S.
Carini, G. A.
Cui, Y.
Li, L.
James, R. B.
[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2007, 571 (03) : 687 - 698
[6] Correlations Between Crystal Defects and Performance of CdZnTe Detectors
Bolotnikov, A. E.
Babalola, S.
Camarda, G. S.
Cui, Y.
Gul, R.
Egarievwe, S. U.
Fochuk, P. M.
Fuerstnau, M.
Horace, J.
Hossain, A.
Jones, F.
Kim, K. H.
Kopach, O. V.
McCall, B.
Marchini, L.
Raghothamachar, B.
Taggart, R.
Yang, G.
Xu, L.
James, R. B.
[J]. IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 2011, 58 (04) : 1972 - 1980
[7] Internal Electric-Field-Lines Distribution in CdZnTe Detectors Measured Using X-Ray Mapping
Bolotnikov, A. E.
Camarda, G. S.
Cui, Y.
Hossain, A.
Yang, G.
Yao, H. W.
James, R. B.
[J]. IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 2009, 56 (03) : 791 - 794
[8] Effects of Te Inclusions on the Performance of CdZnTe Radiation Detectors
Bolotnikov, A. E.
Abdul-Jabbar, N. M.
Babalola, O. S.
Camarda, G. S.
Cui, Y.
Hossain, A. M.
Jackson, E. M.
Jackson, H. C.
James, J. A.
Kohman, K. T.
Luryi, A. L.
James, R. B.
[J]. IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 2008, 55 (05) : 2757 - 2764
[9] Bolotnikov A.E., 2010, P SPIE HARD XRAY 11, V7805, P7805
[10] Charge loss between contacts of CdZnTe pixel detectors
Bolotnikov, AE
Cook, WR
Harrison, FA
Wong, AS
Schindler, SM
Eichelberger, AC
[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1999, 432 (2-3) : 326 - 331

← 1 2 3 4 →