Influence of hydrogen on hydrogenated cadmium telluride optical spectra

Malgorzata M. Pociask 1Jacek Polit 1E Sheregii 1J Cebulski 1A Kisiel 2Andrzej Mycielski 3Jerzy Morgiel 4M Piccinini 5Augusto Marcelli 5B V. Robouch 5M Cestelli Guidi 5,6Victor Savchyn I. I. Izhnin 7Paweł Zajdel 8A Nucara 6

1. University of Rzeszow, Institute of Physics, Rejtana 16, Rzeszów 35-310, Poland
2. Jagiellonian University, Institute of Physics (IF UJ), Reymonta 4, Kraków 30-059, Poland
3. Polish Academy of Sciences, Institute of Physics, al. Lotników 32/46, Warszawa 02-668, Poland
4. Polish Academy of Sciences, Institute of Metallurgy and Materials Sciences (IMIM PAN), Reymonta 25, Kraków 30-059, Poland
5. °Laboratori Nazionali Frascati INFN (INFN), Via E. Fermi 40, Frascati 00044, Italy
6. Dipartimento di Fisica and Unita' INFM, Universita' di Roma "La Sapienza", Piazzale Aldo Moro 2, Roma 00185, Italy
7. R&D Institute for Materials SRC "Carat", Lviv, Ukraine
8. Jagiellonian University, Medical College, Department of Medicinal Chemistry, Medyczna 9, Kraków 30-688, Poland


The presence of oxygen impurity in semiconducting materials affects the electrical properties of crystals and significantly limits their application. To remove oxygen impurity, ultra-pure hydrogen is used while growing Te-containing crystals such as CdTe, CdZnTe, and ZnTe. The hydrogenation of CdTe crystals is a technological process that purifies the basic material from oxygen, mainly cadmium and tellurium oxide compounds incorporated in CdTe crystalline lattice. In the present work we analyses the deformations induced by hydrogen and oxygen atoms in CdTe crystals looking at their influence on the near fundamental band (NFB), middle infrared (MIR) and far infrared (FIR) reflectivity spectra as well as on cathodoluminescence (CL) spectra. Comparison of the hydrogenated CdTe phonon structure profiles confirms the presence of hydrogen atoms bounded inside the lattice. The possible localization of hydrogen and oxygen ions within the tetrahedron coordinated lattice is discussed in the framework of a model that shows a good agreement with recent NFB, MIR and FIR experiments carried out on hydrogenated CdTe crystals. Measured reflection spectra in the wavelength range 190-1400 nm (NFB) indicate the appearance in CdTe(HM) and CdTe(HL) of additional maxima at 966 nm related to the electron transitions from level about 0.2 eV above the valence band. The CL spectra confirmed existence of this electron level. We present a possible H2 alignment similar to the single H model i.e., over the face (at about 0.38 Å). For this model the angle from the central atom to the H atoms is equal to 64° which is also close to the bonding angle of CdH2. The propose model was verified by TEM images.

Legal notice
  • Legal notice:

    Copyright (c) Pielaszek Research, all rights reserved.
    The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
    In every case, proper references including Author(s) name(s) and URL of this webpage: must be provided.


Related papers
  1. Anisotropy of selected properties of Al2O3-graphene composite
  2. (Cd, Mn)Te Crystals for X and Gamma Radiation Detectors - an Alternative Material to CdTe and (Cd,Zn)Te. 
  3. SEM studies of the etched surface of (Cd,Mn)Te
  4. The influence of growth atmosphere on the self-selection of the grains during ZnO crystal growth
  5. Electronic structure and magnetic properties of nano and single crystals SrLaAlO4: Mn
  6. The highly versatile handle for synthesis of secondary amine derivatives with potential CNS activity: The Pipecolic Linker
  7. Design, synthesis and anticonvulsant activity of new N-Mannich bases derived from 3-phenylpyrrolidine-  2,5-diones
  8. The multiobjective based design, synthesis and evaluation of the arylsulfonamide/amide derivatives of arylxyethyl- and arylthioethyl- piperidines and pyrrolidines as a novel class of potent 5-HT7 receptor antagonists
  9. Wet chemical methods of manufacturing alumina nanopowders
  10. A novel handle for chemistry on solid support: the Pipecolic linker
  11. Quinolinesulfonamides as potential 5-HT7 and 5-HT1A receptor ligands
  12. The study of HgCdTe MBE-grown structure with ion milling
  13. Far-infrared reflectivity as a probe of point defects in Zn- and Cd-doped HgTe
  14. Far-infrared and Raman Spectroscopy of CdTe0.97Se0.03(In)
  15. Ion milling-assisted study of defect structure of HgCdTe layers grown by liquid phase epitaxy on CdZnTe substrates
  16. Discontinuity of the phonon mode frequency temperature dependence caused by a zero-gap state in HgCdTe alloys
  17.  Far-infrared reflectivity as a probe of point defects in Zn- and Cd-doped HgTe
  18. SR a brilliant sources for solid-state researches in the IR and far-IR energy domain 
  19. Additional  Phonon Modes related to intrinsic defects in CdHgTe
  20. Solid-phase synthesis and preliminary biological investigation of arylpiperazine library as 5-HT1A and 5-HT2A receptor ligands
  21. Phonon and vibrational spectra of real crystals obtained using the synchrotron radiation
  22. HRTEM and TEM studies of amorphous structures in ZrNiTiCu base alloys obtained by rapid solidification or ball milling
  23. ZnO homoepitaxial growth by Atomic Layer Epitaxy technique.
  24. Structural and Electric Fieeld-Induced Properties of the narrow-Gap Semiconductor ZnCdHgTe Thin Films
  25. Preparation of the ZnO substrate surface
  26. TEM Characterization of Thin-Layered Materials
  27. Electrical contacts to semi-insulating (Cd,Mn)Te:V
  28. Influence of hydrogen on optical spectra of hydrogenated CdTe
  29. Microstructure and micro mechanical properties of multilayer Cr/CrN, PLD coatings
  30. Search for New Metallic Glass Compositions in NiZrTi Base Alloys Near Multicomponent Eutectic Positions
  31. Effect of the Annealing Atmosphere on the Quality of ZnO Crystal Surface
  32. Structure properties of bulk ZnO crystals
  33. Materials requirements in the group - CdTe, CdZnTe and CdMnTe - and recent advances for X-ray and gamma-ray applications.
  34. Applications of the II-VI semimagnetic semiconductors
  35. Is the (Cd,Mn)Te crystal a prospective material for X-ray and γ-ray detectors?
  36. The local crystalline structure of ZnCdTe alloys obtained by Far Infrared Synchrotron Radiation measurements
  37. Defects induced by oxygen and hydrogen in CdTe crystals
  39. Structural and optical characterization of epitaxial layers of CdTe/PbTe grown on BaF2 (111) substrates
  40. Low-frequency magnons and phonons in hexagonal MnTe
  42. CVT contactless growth of ZnO crystals
  43. Multi- layer composite based on amorphous materials and quasicrystals, deposited by laser ablation
  44. Properties of MBE CdxHg1-xTe/GaAs structures modified by ion-beam milling
  45. Mn doped ZnTe (110) (1x1) surface in Resonant Photoemission study
  46. Differential Reflectivity and Photoemission study of ZnTe and CdTe(110) surface

Presentation: Poster at E-MRS Fall Meeting 2008, Symposium J, by Malgorzata M. Pociask
See On-line Journal of E-MRS Fall Meeting 2008

Submitted: 2008-05-12 09:21
Revised:   2009-06-07 00:48
© 1998-2022 pielaszek research, all rights reserved Powered by the Conference Engine