Effects of excess Te on flux inclusion formation in the growth of cadmium zinc telluride when forced melt convection is applied

McCoy, Jedidiah J.; Kakkireni, Saketh; Gélinas, Guillaume; Garaffa, Jeremy F.; Swain, Santosh K.; Lynn, Kelvin G.

doi:10.1016/j.jcrysgro.2020.125542

Title: Effects of excess Te on flux inclusion formation in the growth of cadmium zinc telluride when forced melt convection is applied

Journal Article · Tue Feb 04 00:00:00 EST 2020 · Journal of Crystal Growth

DOI:https://doi.org/10.1016/j.jcrysgro.2020.125542· OSTI ID:1801120

McCoy, Jedidiah J. ^[1]; Kakkireni, Saketh ^[1]; Gélinas, Guillaume ^[2]; Garaffa, Jeremy F. ^[3]; Swain, Santosh K. ^[1]; Lynn, Kelvin G. ^[1]

Washington State Univ., Pullman, WA (United States)
5N Plus Inc., Montréal, QC (Canada); École Polytechnique de Montréal, QC (Canada)
5N Plus Inc., Montréal, QC (Canada)

The presence of second phase defects, particularly flux inclusions of tellurium rich composition, are of great concern for charge collection efficiency in cadmium zinc telluride (CZT) and cadmium telluride (CT) material intended for applications such as radiation detection. These inclusions can distort applied electric field lines within the detector as well as act as trapping centers for charge carriers. Reduction and/or elimination of these inclusions is required to achieve appropriate charge collection efficiencies, especially in detectors of thicknesses greater than 5 mm. These so-called flux inclusions are understood to form as a consequence of constitutional undercooling at the crystal growth interface. In this study, a forced melt convection technique was applied in Vertical Bridgman (VB) melt growth of CZT without reducing imposed growth rates of ~2 mm/hr. Several rotation profiles were tested while adjusting the melt composition from 51.62 to 61.75 atomic percent (at%) Te where the Te concentration was initially increased to improve overall material purity. With forced melt convection, the best inclusion distributions were achieved with highly Te rich melt compositions, far beyond the stoichiometric composition range for the CZT system. Average inclusion diameters were reduced to 2 µm while inclusions greater than 5 µm were essentially eliminated. Composition analyses of these ingots revealed near equilibrium concentrations of Te, even with ingots grown from Te concentrations as high as 61.75 at% Te. In this paper, a recipe for the reduction of inclusions in CZT melt growth is put forward and the implications of this method on our understanding of inclusion formation are discussed.

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Research Organization:: Washington State Univ., Pullman, WA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0002565

OSTI ID:: 1801120

Alternate ID(s):: OSTI ID: 1599666

Journal Information:: Journal of Crystal Growth, Vol. 535; ISSN 0022-0248

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 7 works

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References (26)

Effects of Te Inclusions on the Performance of CdZnTe Radiation Detectors Bolotnikov, A. E.; Abdul-Jabbar, N. M.; Babalola, O. S. IEEE Transactions on Nuclear Science, Vol. 55, Issue 5 https://doi.org/10.1109/TNS.2008.2003355	journal	October 2008
Phase-field simulation during directional solidification of a binary alloy using adaptive finite element method Takaki, Tomohiro; Fukuoka, Toshimichi; Tomita, Yoshihiro Journal of Crystal Growth, Vol. 283, Issue 1-2 https://doi.org/10.1016/j.jcrysgro.2005.05.064	journal	September 2005
Phase field modeling of shallow cells during directional solidification of a binary alloy Bi, Zhiqiang; Sekerka, Robert F. Journal of Crystal Growth, Vol. 237-239 https://doi.org/10.1016/S0022-0248(01)01893-0	journal	April 2002
Size and distribution of Te inclusions in THM as-grown CZT wafers: The effect of the rate of crystal cooling Roy, U. N.; Weiler, S.; Stein, J. Journal of Crystal Growth, Vol. 332, Issue 1 https://doi.org/10.1016/j.jcrysgro.2011.07.025	journal	October 2011
Reduction of Inclusions in (CdZn)Te and CdTe:In Single Crystals by Post-Growth Annealing Belas, E.; Bugár, M.; Grill, R. Journal of Electronic Materials, Vol. 37, Issue 9 https://doi.org/10.1007/s11664-008-0479-3	journal	May 2008
Cumulative effects of Te precipitates in CdZnTe radiation detectors Bolotnikov, A. E.; Camarda, G. S.; Carini, G. A. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 571, Issue 3 https://doi.org/10.1016/j.nima.2006.11.023	journal	February 2007
Cadmium zinc telluride and its use as a nuclear radiation detector material Schlesinger, T. E.; Toney, J. E.; Yoon, H. Materials Science and Engineering: R: Reports, Vol. 32, Issue 4-5 https://doi.org/10.1016/S0927-796X(01)00027-4	journal	April 2001
Towards optimization of ACRT schedules applied to the gradient freeze growth of cadmium zinc telluride Divecha, Mia S.; Derby, Jeffrey J. Journal of Crystal Growth, Vol. 480 https://doi.org/10.1016/j.jcrysgro.2017.10.001	journal	December 2017
Overcoming Mobility Lifetime Product Limitations in Vertical Bridgman Production of Cadmium Zinc Telluride Detectors McCoy, Jedidiah J.; Kakkireni, Saketh; Gilvey, Zachary H. Journal of Electronic Materials, Vol. 48, Issue 7 https://doi.org/10.1007/s11664-019-07196-5	journal	April 2019
The Influence of Constitutional Supercooling on the Distribution of Te-Particles in Melt-Grown CZT Henager, Charles H.; Alvine, Kyle J.; Bliss, Mary Journal of Electronic Materials, Vol. 44, Issue 11 https://doi.org/10.1007/s11664-015-3995-y	journal	September 2015
Non-stoichiometry related defects at the melt growth of semiconductor compound crystals – a review Rudolph, P. Crystal Research and Technology, Vol. 38, Issue 78 https://doi.org/10.1002/crat.200310069	journal	July 2003
Post-growth thermal annealing study of CdZnTe for developing room-temperature X-ray and gamma-ray detectors Yang, G.; Bolotnikov, A. E.; Fochuk, P. M. Journal of Crystal Growth, Vol. 379 https://doi.org/10.1016/j.jcrysgro.2012.11.041	journal	September 2013
A method for an accurate determination of stoichiometric deviations in CdTe and CdZnTe bulk crystals Zappettini, A.; Waldner, R.; Bissoli, F. Journal of Crystal Growth, Vol. 275, Issue 1-2 https://doi.org/10.1016/j.jcrysgro.2004.11.064	journal	February 2005
Recipe to minimize Te precipitation in CdTe and (Cd,Zn)Te crystals Vydyanath, H. R. Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, Vol. 10, Issue 4 https://doi.org/10.1116/1.586275	journal	July 1992
Basic problems of vertical Bridgman growth of CdTe Rudolph, Peter; Mühlberg, Manfred Materials Science and Engineering: B, Vol. 16, Issue 1-3 https://doi.org/10.1016/0921-5107(93)90005-8	journal	January 1993
Stability of a Planar Interface During Solidification of a Dilute Binary Alloy Mullins, W. W.; Sekerka, R. F. Journal of Applied Physics, Vol. 35, Issue 2 https://doi.org/10.1063/1.1713333	journal	February 1964
Composition Study of CdTe Charges Synthesized by the Travelling Heater Method Audet, Nicholas; Levicharsky, Blagovest; Zappettini, Andrea IEEE Transactions on Nuclear Science, Vol. 54, Issue 4 https://doi.org/10.1109/TNS.2007.903171	journal	August 2007
Phase Diagram of the Zn-Cd-Te Ternary System Steininger, Jacques; Strauss, Alan J.; Brebrick, Robert F. Journal of The Electrochemical Society, Vol. 117, Issue 10 https://doi.org/10.1149/1.2407297	journal	January 1970
Impurity gettering effect of Te inclusions in CdZnTe single crystals Yang, G.; Bolotnikov, A. E.; Cui, Y. Journal of Crystal Growth, Vol. 311, Issue 1 https://doi.org/10.1016/j.jcrysgro.2008.09.201	journal	December 2008
Analysis of the accelerated crucible rotation technique applied to the gradient freeze growth of cadmium zinc telluride Divecha, Mia S.; Derby, Jeffrey J. Journal of Crystal Growth, Vol. 468 https://doi.org/10.1016/j.jcrysgro.2016.09.068	journal	June 2017
Fluctuations in induced charge introduced by Te inclusions within CdZnTe radiation detectors Bale, Derek S. Journal of Applied Physics, Vol. 108, Issue 2 https://doi.org/10.1063/1.3448234	journal	July 2010
Elimination of Te precipitates from CdTe wafers Sochinskii, N. V.; Dieguez, E.; Pal, U. Semiconductor Science and Technology, Vol. 10, Issue 6 https://doi.org/10.1088/0268-1242/10/6/020	journal	June 1995
The crystal perfection depends on the superheating of the mother phase too — experimental facts and speculations on the “melt structure” of semiconductor compounds Rudolph, P.; Koh, H. J.; Schäfer, N. Journal of Crystal Growth, Vol. 166, Issue 1-4 https://doi.org/10.1016/0022-0248(96)00119-4	journal	September 1996
Synthesis of ultra-high-purity CdTe ingots by the traveling heater method Audet, N.; Cossette, M. Journal of Electronic Materials, Vol. 34, Issue 6 https://doi.org/10.1007/s11664-005-0003-y	journal	June 2005
Distribution and genesis of inclusions in CdTe and (Cd,Zn)Te single crystals grown by the Bridgman method and by the travelling heater method Rudolph, P.; Engel, A.; Schentke, I. Journal of Crystal Growth, Vol. 147, Issue 3-4 https://doi.org/10.1016/0022-0248(94)00617-2	journal	February 1995
Influence of growth parameters on CdTe low temperature thermal conductivity Jouglar, J.; Hetroit, C.; Vuillermoz, P. L. Journal of Applied Physics, Vol. 51, Issue 6 https://doi.org/10.1063/1.328066	journal	June 1980

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