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 language | English |
|---|---|
| Pages (from-to) | 35-43 |
| Number of pages | 9 |
| Journal | Materials Chemistry And Physics |
| Volume | 189 |
| DOIs | |
| Publication status | Published - 1 Mar 2017 |
Fingerprint
Keywords
- AFM
- Oxidation
- Photoelectron spectroscopy
- Semiconductors
- Surfaces
Cite this
}
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 journal › Article
TY - JOUR
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
UR - http://www.scopus.com/inward/record.url?scp=85010868582&partnerID=8YFLogxK
U2 - 10.1016/j.matchemphys.2016.12.029
DO - 10.1016/j.matchemphys.2016.12.029
M3 - Article
VL - 189
SP - 35
EP - 43
JO - Materials Chemistry And Physics
JF - Materials Chemistry And Physics
SN - 0254-0584
ER -