Surface composition of Cd1–xFe(Mn)xTe1–ySey systems exposed to air

Nenad Bundaleski, Ivana Radisavljević, João Trigueiro, Alexander Tolstogouzov, Zlatko Rakočević, Mirjana Medić, Orlando M N D Teodoro, Nebojša Romčević, Nenad Ivanović

Research output: Contribution to journalArticle

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Abstract

Using X–ray induced Photoelectron Spectroscopy, Time–of–Flight Secondary Ion Mass Spectrometry and Atomic Force Microscopy we have investigated elemental composition, structure and oxidation process taking place at the surfaces of polycrystalline Cd0.99Fe0.01Te0.97Se0.03 and Cd0.95Mn0.05Te0.97Se0.03 systems stored in ambient conditions. The surface oxidation destroys the native CdTe matrix and provokes substantial atomic rearrangement in the first few atomic layers. The near–surface region of both systems is enriched in Cd and to some extent Te–deficient, but the surface structure, morphology and the native oxide composition are all found to be considerably different. In Cd0.99Fe0.01Te0.97Se0.03 system both Fe and Se dopants diffuse into the bulk and oxidation of its surface results in formation of a thin CdTeO3 layer which covers the CdTe matrix. In Cd0.95Mn0.05Te0.97Se0.03 system oxygen–rich atmosphere triggers Mn and Se out–diffusion and the nonuniform oxide layer predominantly consists of MnO and a small amount of Te–oxide which both lay underneath a thin layer of metallic Cd segregated at the top of the surface.

Original languageEnglish
Pages (from-to)35-43
Number of pages9
JournalMaterials Chemistry And Physics
Volume189
DOIs
Publication statusPublished - 1 Mar 2017

Fingerprint

Surface structure
air
Air
Oxidation
Oxides
oxidation
Photoelectron spectroscopy
Secondary ion mass spectrometry
Chemical analysis
oxides
Atomic force microscopy
matrices
secondary ion mass spectrometry
Doping (additives)
actuators
photoelectron spectroscopy
atomic force microscopy
atmospheres

Keywords

  • AFM
  • Oxidation
  • Photoelectron spectroscopy
  • Semiconductors
  • Surfaces

Cite this

Bundaleski, N., Radisavljević, I., Trigueiro, J., Tolstogouzov, A., Rakočević, Z., Medić, M., ... Ivanović, N. (2017). Surface composition of Cd1–xFe(Mn)xTe1–ySey systems exposed to air. Materials Chemistry And Physics, 189, 35-43. https://doi.org/10.1016/j.matchemphys.2016.12.029
Bundaleski, Nenad ; Radisavljević, Ivana ; Trigueiro, João ; Tolstogouzov, Alexander ; Rakočević, Zlatko ; Medić, Mirjana ; Teodoro, Orlando M N D ; Romčević, Nebojša ; Ivanović, Nenad. / Surface composition of Cd1–xFe(Mn)xTe1–ySey systems exposed to air. In: Materials Chemistry And Physics. 2017 ; Vol. 189. pp. 35-43.
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abstract = "Using X–ray induced Photoelectron Spectroscopy, Time–of–Flight Secondary Ion Mass Spectrometry and Atomic Force Microscopy we have investigated elemental composition, structure and oxidation process taking place at the surfaces of polycrystalline Cd0.99Fe0.01Te0.97Se0.03 and Cd0.95Mn0.05Te0.97Se0.03 systems stored in ambient conditions. The surface oxidation destroys the native CdTe matrix and provokes substantial atomic rearrangement in the first few atomic layers. The near–surface region of both systems is enriched in Cd and to some extent Te–deficient, but the surface structure, morphology and the native oxide composition are all found to be considerably different. In Cd0.99Fe0.01Te0.97Se0.03 system both Fe and Se dopants diffuse into the bulk and oxidation of its surface results in formation of a thin CdTeO3 layer which covers the CdTe matrix. In Cd0.95Mn0.05Te0.97Se0.03 system oxygen–rich atmosphere triggers Mn and Se out–diffusion and the nonuniform oxide layer predominantly consists of MnO and a small amount of Te–oxide which both lay underneath a thin layer of metallic Cd segregated at the top of the surface.",
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Bundaleski, N, Radisavljević, I, Trigueiro, J, Tolstogouzov, A, Rakočević, Z, Medić, M, Teodoro, OMND, Romčević, N & Ivanović, N 2017, 'Surface composition of Cd1–xFe(Mn)xTe1–ySey systems exposed to air' Materials Chemistry And Physics, vol. 189, pp. 35-43. https://doi.org/10.1016/j.matchemphys.2016.12.029

Surface composition of Cd1–xFe(Mn)xTe1–ySey systems exposed to air. / Bundaleski, Nenad; Radisavljević, Ivana; Trigueiro, João; Tolstogouzov, Alexander; Rakočević, Zlatko; Medić, Mirjana; Teodoro, Orlando M N D; Romčević, Nebojša; Ivanović, Nenad.

In: Materials Chemistry And Physics, Vol. 189, 01.03.2017, p. 35-43.

Research output: Contribution to journalArticle

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T1 - Surface composition of Cd1–xFe(Mn)xTe1–ySey systems exposed to air

AU - Bundaleski, Nenad

AU - Radisavljević, Ivana

AU - Trigueiro, João

AU - Tolstogouzov, Alexander

AU - Rakočević, Zlatko

AU - Medić, Mirjana

AU - Teodoro, Orlando M N D

AU - Romčević, Nebojša

AU - Ivanović, Nenad

N1 - Sem PDF. Serbian Ministry of Education, Science and Technological Development (III 45003; III 45005) Program of scientific and technological cooperation between Republic of Serbia (451-03-02328/2012-14/03) Portuguese Research Grant through FCT-MEC (Pest-UID/FIS/00068/2013) Program of scientific and technological cooperation between Republic of Portugal (451-03-02328/2012-14/03)

PY - 2017/3/1

Y1 - 2017/3/1

N2 - Using X–ray induced Photoelectron Spectroscopy, Time–of–Flight Secondary Ion Mass Spectrometry and Atomic Force Microscopy we have investigated elemental composition, structure and oxidation process taking place at the surfaces of polycrystalline Cd0.99Fe0.01Te0.97Se0.03 and Cd0.95Mn0.05Te0.97Se0.03 systems stored in ambient conditions. The surface oxidation destroys the native CdTe matrix and provokes substantial atomic rearrangement in the first few atomic layers. The near–surface region of both systems is enriched in Cd and to some extent Te–deficient, but the surface structure, morphology and the native oxide composition are all found to be considerably different. In Cd0.99Fe0.01Te0.97Se0.03 system both Fe and Se dopants diffuse into the bulk and oxidation of its surface results in formation of a thin CdTeO3 layer which covers the CdTe matrix. In Cd0.95Mn0.05Te0.97Se0.03 system oxygen–rich atmosphere triggers Mn and Se out–diffusion and the nonuniform oxide layer predominantly consists of MnO and a small amount of Te–oxide which both lay underneath a thin layer of metallic Cd segregated at the top of the surface.

AB - Using X–ray induced Photoelectron Spectroscopy, Time–of–Flight Secondary Ion Mass Spectrometry and Atomic Force Microscopy we have investigated elemental composition, structure and oxidation process taking place at the surfaces of polycrystalline Cd0.99Fe0.01Te0.97Se0.03 and Cd0.95Mn0.05Te0.97Se0.03 systems stored in ambient conditions. The surface oxidation destroys the native CdTe matrix and provokes substantial atomic rearrangement in the first few atomic layers. The near–surface region of both systems is enriched in Cd and to some extent Te–deficient, but the surface structure, morphology and the native oxide composition are all found to be considerably different. In Cd0.99Fe0.01Te0.97Se0.03 system both Fe and Se dopants diffuse into the bulk and oxidation of its surface results in formation of a thin CdTeO3 layer which covers the CdTe matrix. In Cd0.95Mn0.05Te0.97Se0.03 system oxygen–rich atmosphere triggers Mn and Se out–diffusion and the nonuniform oxide layer predominantly consists of MnO and a small amount of Te–oxide which both lay underneath a thin layer of metallic Cd segregated at the top of the surface.

KW - AFM

KW - Oxidation

KW - Photoelectron spectroscopy

KW - Semiconductors

KW - Surfaces

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DO - 10.1016/j.matchemphys.2016.12.029

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JO - Materials Chemistry And Physics

JF - Materials Chemistry And Physics

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Bundaleski N, Radisavljević I, Trigueiro J, Tolstogouzov A, Rakočević Z, Medić M et al. Surface composition of Cd1–xFe(Mn)xTe1–ySey systems exposed to air. Materials Chemistry And Physics. 2017 Mar 1;189:35-43. https://doi.org/10.1016/j.matchemphys.2016.12.029