Red and green nanocomposite phosphors prepared from porous GaAs templates
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SIRBU, Lilian, URSAKI, Veacheslav, TIGINYANU, Ion, DOLGALEVA, Ksenia, BOYD, Robert W.. Red and green nanocomposite phosphors prepared from porous GaAs templates. In: Journal of Optics A: Pure and Applied Optics, 2007, vol. 9, pp. 401-404. ISSN 1464-4258. DOI: https://doi.org/10.1088/1464-4258/9/4/015
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Journal of Optics A: Pure and Applied Optics
Volumul 9 / 2007 / ISSN 1464-4258 /ISSNe 1741-3567

Red and green nanocomposite phosphors prepared from porous GaAs templates

DOI: https://doi.org/10.1088/1464-4258/9/4/015

Pag. 401-404

Sirbu Lilian1, Ursaki Veacheslav2, Tiginyanu Ion12, Dolgaleva Ksenia3, Boyd Robert W.3
 
1 Technical University of Moldova,
2 Institute of Applied Physics, Academy of Sciences of Moldova,
3 University of Rochester
 
Disponibil în IBN: 11 aprilie 2018


Rezumat

Rare-earth-containing oxide nanocomposites are prepared in a controlled fashion from porous GaAs templates. The initial porous GaAs network is replaced by a β-Ga2O3 one during annealing at temperatures from 500 to 900 °C. The impregnation of Eu and Er lanthanides from EuCl 3:C2H5OH and ErCl3:C 2H5OH solutions results in the formation of xenotime EuAsO4 and ErAsO4 microcrystals finely dispersed into the native oxide matrix. The 4f-4f intrashell transitions in Eu3+ and Er3+ ions ensure red and green emission from EuAsO4 and ErAsO4 nanophases. These nanocomposites may prove useful in future generations of optoelectronic and photonic devices.

Cuvinte-cheie
photoluminescence, porous materials, X-ray diffraction