'Star-like' defects in Cd-annealed CdZnTe crystals - An experimental study of their origin and formation mechanism

G. Yang; A. E. Bolotnikov; P. M. Fochuk; Y. Cui; G. S. Camarda; A. Hossain; K. H. Kim; B. Raghothamachar; U. Roy; R. B. James

doi:10.1002/crat.201300009

'Star-like' defects in Cd-annealed CdZnTe crystals - An experimental study of their origin and formation mechanism

G. Yang^*
, A. E. Bolotnikov
, P. M. Fochuk
, Y. Cui
, G. S. Camarda
, A. Hossain
, K. H. Kim
, B. Raghothamachar
, U. Roy
, R. B. James

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

We conducted low-temperature annealing experiments at temperatures slightly above and below the melting point of Te to clarify the effects of the state of Te inclusions (solid or liquid) upon the formation of 'star-like' defects in Cd-annealed CdZnTe (CZT). We also carried out post-growth annealing experiments with and without using Cd vapor to clarify the mechanism of formation of such defects. We demonstrated that these 'star-like' defects are due to the reaction between in-diffused Cd atoms and the molten Te inclusions, but we found no observable 'one-to-one' correlation between 'star-like' defects and Te inclusions. The non-uniform distribution of Te inclusions in the CZT matrix could account for this phenomenon since the punching distance of the dislocations depends on the volume fraction of inclusions within the matrix.

Original language	English
Pages (from-to)	221-226
Number of pages	6
Journal	Crystal Research and Technology
Volume	48
Issue number	4
DOIs	https://doi.org/10.1002/crat.201300009
Publication status	Published - 2013 Apr

Keywords

CdZnTe
annealing
dislocations
inclusions

ASJC Scopus subject areas

General Chemistry
General Materials Science
Condensed Matter Physics

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10.1002/crat.201300009

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title = "'Star-like' defects in Cd-annealed CdZnTe crystals - An experimental study of their origin and formation mechanism",

abstract = "We conducted low-temperature annealing experiments at temperatures slightly above and below the melting point of Te to clarify the effects of the state of Te inclusions (solid or liquid) upon the formation of 'star-like' defects in Cd-annealed CdZnTe (CZT). We also carried out post-growth annealing experiments with and without using Cd vapor to clarify the mechanism of formation of such defects. We demonstrated that these 'star-like' defects are due to the reaction between in-diffused Cd atoms and the molten Te inclusions, but we found no observable 'one-to-one' correlation between 'star-like' defects and Te inclusions. The non-uniform distribution of Te inclusions in the CZT matrix could account for this phenomenon since the punching distance of the dislocations depends on the volume fraction of inclusions within the matrix.",

keywords = "CdZnTe, annealing, dislocations, inclusions",

author = "G. Yang and Bolotnikov, \{A. E.\} and Fochuk, \{P. M.\} and Y. Cui and Camarda, \{G. S.\} and A. Hossain and Kim, \{K. H.\} and B. Raghothamachar and U. Roy and James, \{R. B.\}",

year = "2013",

month = apr,

doi = "10.1002/crat.201300009",

language = "English",

volume = "48",

pages = "221--226",

journal = "Crystal Research and Technology",

issn = "0232-1300",

publisher = "John Wiley \& Sons Inc.",

number = "4",

}

TY - JOUR

T1 - 'Star-like' defects in Cd-annealed CdZnTe crystals - An experimental study of their origin and formation mechanism

AU - Yang, G.

AU - Bolotnikov, A. E.

AU - Fochuk, P. M.

AU - Cui, Y.

AU - Camarda, G. S.

AU - Hossain, A.

AU - Kim, K. H.

AU - Raghothamachar, B.

AU - Roy, U.

AU - James, R. B.

PY - 2013/4

Y1 - 2013/4

N2 - We conducted low-temperature annealing experiments at temperatures slightly above and below the melting point of Te to clarify the effects of the state of Te inclusions (solid or liquid) upon the formation of 'star-like' defects in Cd-annealed CdZnTe (CZT). We also carried out post-growth annealing experiments with and without using Cd vapor to clarify the mechanism of formation of such defects. We demonstrated that these 'star-like' defects are due to the reaction between in-diffused Cd atoms and the molten Te inclusions, but we found no observable 'one-to-one' correlation between 'star-like' defects and Te inclusions. The non-uniform distribution of Te inclusions in the CZT matrix could account for this phenomenon since the punching distance of the dislocations depends on the volume fraction of inclusions within the matrix.

AB - We conducted low-temperature annealing experiments at temperatures slightly above and below the melting point of Te to clarify the effects of the state of Te inclusions (solid or liquid) upon the formation of 'star-like' defects in Cd-annealed CdZnTe (CZT). We also carried out post-growth annealing experiments with and without using Cd vapor to clarify the mechanism of formation of such defects. We demonstrated that these 'star-like' defects are due to the reaction between in-diffused Cd atoms and the molten Te inclusions, but we found no observable 'one-to-one' correlation between 'star-like' defects and Te inclusions. The non-uniform distribution of Te inclusions in the CZT matrix could account for this phenomenon since the punching distance of the dislocations depends on the volume fraction of inclusions within the matrix.

KW - CdZnTe

KW - annealing

KW - dislocations

KW - inclusions

UR - https://www.scopus.com/pages/publications/84876247761

U2 - 10.1002/crat.201300009

DO - 10.1002/crat.201300009

M3 - Article

AN - SCOPUS:84876247761

SN - 0232-1300

VL - 48

SP - 221

EP - 226

JO - Crystal Research and Technology

JF - Crystal Research and Technology

IS - 4

ER -

'Star-like' defects in Cd-annealed CdZnTe crystals - An experimental study of their origin and formation mechanism

Abstract

Keywords

ASJC Scopus subject areas

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