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Number of results
2011 | 120 | 6A | A-66-A-68

Article title

Positron-Annihilation, Structural and Optical Studies on Properties of Nanostructured ZrO_2, ZnO, Bi_2O_3 and ZnO-Bi_2O_3

Content

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Languages of publication

EN

Abstracts

EN
Nanostructured oxides, like ZrO_2, on ZnO and Bi_2O_3 show interesting electronic and photovoltaic properties. Pressed and annealed samples were obtained from nanopowders grown in hydrothermal or plasma processes. Positron annihilation (the Doppler broadening depth-resolved, positron lifetime) techniques were used to trace structural changes in samples after annealing. Photoluminescence spectra of all investigated samples show broad-band emission in the visible, with intensity depending on annealing temperature. The change in nanoporosity and positron lifetimes correlate well with changes in photoluminescence properties. The nature of broad photoluminescence bands is to be understood; further positron studies via the Doppler coincidence method would help in identifying the nature of defects in these samples.

Keywords

EN

Contributors

author
  • Institute of High Pressure Physics, Polish Academy of Sciences, Warsaw, Poland
author
  • Institute of Physics, Nicolaus Copernicus University, Toruń, Poland
author
  • Institute of Inorganic Chemistry, Riga Technical University, Salaspils, Latvia
author
  • Institute of Microelectronics and Optoelectronics, Warsaw University of Technology, Warsaw, Poland
  • Institute of Microelectronics and Optoelectronics, Warsaw University of Technology, Warsaw, Poland
author
  • Dipartimento di Fisica, Universita di Trento, Trento, Italy
author
  • Institute of Physics, Nicolaus Copernicus University, Toruń, Poland

References

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  • [2] Ü. Özgür, Ya.I. Alivov, C. Liu, A. Teke, M.A. Reshchikov, S. Dogan, V. Avrutin, S.-J. Cho, H. Morkoç, J. Appl. Phys. 98, 041301 (2005)
  • [3] J.D. Fidelus, A. Karbowski, S. Mariazzi, R.S. Brusa, G. Karwasz, Nukleonika 55, 85 (2010)
  • [4] G.P. Karwasz, A. Zecca, R.S. Brusa, D. Pliszka, J. Alloys Comp. 382, 244 (2004)
  • [5] R.S. Brusa, C. Macchi, S. Mariazzi, G.P. Karwasz, G. Scarel, M. Fanciulli, Radiat. Phys. Chem. 76, 189 (2007)
  • [6] A. Karbowski, J.D. Fidelus, G. Karwasz, Mater. Sci. Forum 666, 155 (2011)
  • [7] T. Hirai, Y. Asada, J. Colloid Interface Sci. 284, 184 (2005)
  • [8] A.B. Djurišić, Y.H. Leung, Small 2, 944 (2006) %

Document Type

Publication order reference

Identifiers

YADDA identifier

bwmeta1.element.bwnjournal-article-appv120n6ap19kz
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