Electro and electro-photo plasticity of CdZnTeSe and CdZnTe

In this work, we studied the influence of applied bias on of the Vickers microhardness HV 0.025 of CdZnTeSe and CdZnTe semi-insulating samples without and with the illumination of light at 870 nm. We observed that a small applied bias results in the hardening of the material. The effect is strongest...

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Bibliographic Details
Published inMaterials today communications Vol. 34
Main Authors Dědič, Václav, Franc, Jan, Moravec, Pavel, Grill, Roman, Elhadidy, Hassan, Šíma, Vladimír, Cieslar, Miroslav, Roy, Utpal N., James, Ralph B.
Format Journal Article
LanguageEnglish
Published United States Elsevier 09.12.2022
Subjects
CdZnTe
CdZnTeSe
electroplasticity
MATERIALS SCIENCE
photoplasticity
spectral dependence
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Summary:In this work, we studied the influence of applied bias on of the Vickers microhardness HV 0.025 of CdZnTeSe and CdZnTe semi-insulating samples without and with the illumination of light at 870 nm. We observed that a small applied bias results in the hardening of the material. The effect is strongest at a bias of ± 0.5 V and is further strengthened by additional illumination. We suggest that the observed positive electro and electro-photo plastic effects in CdZnTeSe and CdZnTe can be explained by an increase in the concentration of free electrons and holes injected from contacts in a biased sample or generated by illumination. These free carriers can be trapped at dislocations and induce a reconstruction of bonds at the dislocation core. The necessity to break the bonds before dislocation glide results in an increase of microhardness.
Bibliography:SRNL-STI-2022-00438
89303321CEM000080
USDOE Office of Environmental Management (EM)
USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation
USDOE Laboratory Directed Research and Development (LDRD) Program
ISSN:2352-4928
2352-4928