Positron annihilation spectroscopy of vacancy-related defects in CdTe:Cl and CdZnTe:Ge at different stoichiometry deviations

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10328937" target="_blank" >RIV/00216208:11320/16:10328937 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1038/srep20641" target="_blank" >http://dx.doi.org/10.1038/srep20641</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/srep20641" target="_blank" >10.1038/srep20641</a>

Result language

angličtina

Original language name

Positron annihilation spectroscopy of vacancy-related defects in CdTe:Cl and CdZnTe:Ge at different stoichiometry deviations

Original language description

Positron annihilation spectroscopy (PAS) was used to examine the effect of defined Cd-rich and Te-rich annealing on point defects in Cl-doped CdTe and Ge-doped CdZnTe semi-insulating single crystals. The as-grown crystals contain open-volume defects connected with Cd vacancies (V-Cd). It was found that the Cd vacancies agglomerate into clusters coupled with Cl in CdTe: Cl, and in CdZnTe: Ge they are coupled with Ge donors. While annealing in Cd pressure reduces of the VCd density, subsequent annealing in Te pressure restores V-Cd. The CdTe: Cl contains negatively-charged shallow traps interpreted as Rydberg states of (VCdClTe) A-centres and representing the major positron trapping sites at low temperature. Positrons confined in the shallow traps exhibit lifetime, which is shorter than the CdTe bulk lifetime. Interpretation of the PAS data was successfully combined with electrical resistivity, Hall effect measurements and chemical analysis, and allowed us to determine the principal point defect densities.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BM - Solid-state physics and magnetism

OECD FORD branch

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Project

<a href="/en/project/GAP108%2F11%2F0958" target="_blank" >GAP108/11/0958: Investigation of point defects in ZnO and their interaction with hydrogen and nitrogen</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Scientific Reports

ISSN

2045-2322

e-ISSN

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Volume of the periodical

6

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

16

Pages from-to

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UT code for WoS article

000369742600001

EID of the result in the Scopus database

2-s2.0-84958078684