<abstract xmlns="http://www.w3.org/1999/xhtml"><p>ZnO powders with particle size in the nm to μm range have been fabricated by sonochemical method, utilizing zinc acetate and sodium hydroxide as starting materials. Carrier recombination processes in the powders have been investigated using the photoluminescence, FT-IR and surface photovoltage techniques. It has been shown that the photoluminescence spectra exhibit a number of defect-related emission bands which are typically observed in ZnO lattice and which depend on the sonication time. It has been found that the increase of the stirring time results in a faster decay of the photovoltage transients for times shorter than approximately 5 ms. From the obtained data it has been concluded that the sonication modifies the complicated trapping dynamics from volume to surface defects, whereas the fabrication method itself offers a remarkably convenient means of modifying the relative content of the surface-to-volume defect ratio in powder grains and altering the dynamics of photoexcited carriers.</p></abstract>

ZnO powders with particle size in the nm to μm range have been fabricated by sonochemical method, utilizing zinc acetate and sodium hydroxide as starting materials. Carrier recombination processes in the powders have been investigated using the photoluminescence, FT-IR and surface photovoltage techniques. It has been shown that the photoluminescence spectra exhibit a number of defect-related emission bands which are typically observed in ZnO lattice and which depend on the sonication time. It has been found that the increase of the stirring time results in a faster decay of the photovoltage transients for times shorter than approximately 5 ms. From the obtained data it has been concluded that the sonication modifies the complicated trapping dynamics from volume to surface defects, whereas the fabrication method itself offers a remarkably convenient means of modifying the relative content of the surface-to-volume defect ratio in powder grains and altering the dynamics of photoexcited carriers.

Carrier recombination in sonochemically synthesized ZnO powders

Materials Science-Poland

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

{"article-title":"Carrier recombination in sonochemically synthesized ZnO powders"}

ZnO powders with particle size in the nm to μm range have been fabricated by sonochemical method, utilizing zinc acetate and sodium hydroxide as starting...

Carrier recombination in sonochemically synthesized ZnO powders

Publié en ligne: 23 avr. 2017

Pages: 211 - 216

Reçu: 22 mars 2016

Accepté: 18 déc. 2016

DOI: https://doi.org/10.1515/msp-2017-0016

Mots clés
ZnO, sonochemical synthesis, surface photovoltage, photoluminescence

© 2017 M.I. Zakirov, O.A. Korotchenkov

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Carrier recombination in sonochemically synthesized ZnO powders

Publié en ligne: 23 avr. 2017

Pages: 211 - 216

Reçu: 22 mars 2016

Accepté: 18 déc. 2016

DOI: https://doi.org/10.1515/msp-2017-0016

Mots clésZnO, sonochemical synthesis, surface photovoltage, photoluminescence

© 2017 M.I. Zakirov, O.A. Korotchenkov

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Mots clés
ZnO, sonochemical synthesis, surface photovoltage, photoluminescence