Persistent luminescence of inorganic nanophosphors prepared by wet-chemical synthesis
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2018
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Journal of Alloys and Compounds
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The synthesis of efficient nanosized persistent luminescence materials remains a challenge for the
community. Paradoxically, due to the dependence of the point lattice defects and the persistent luminescence
efficiency, the control of the defect formation, favorable when the materials are prepared at
high temperatures, normally leads to particle growth and sintering. In this work, efficient nanosized rare
earth doped disilicates Sr2MgSi2O7:Eu2þ,Dy3þ were synthesized via three different wet-chemical
methods taking advantages of the microwave-assisted reduction process as a support step to produce
high-quality polycrystalline materials. The crystallite size of the sample showed to be smaller when the
decomposition temperature of the precursors is higher and close to the phase formation energy. The
excitation VUV spectroscopy indicated that despite being nanocrystalline, the materials optical band gap
has just a small difference compared one to another. The reduction of Eu3þ to Eu2þ was successfully
obtained, since the f-d interconfigurational transitions of Eu2þ 4f65d1/4f7 emission were observed in
the blue region of the spectra. The persistent luminescence efficiency measured through its lasting decay
time was close to the commercial materials references and with the advantage of having size control
during the synthesis method that can lead to the size dependent applications of photonic materials.
Como referenciar
BONTURIM, EVERTON; MERIZIO, LEONNAM G.; REIS, ROBERTO dos; BRITO, HERMI F.; RODRIGUES, LUCAS C.V.; FELINTO, MARIA C.F.C. Persistent luminescence of inorganic nanophosphors prepared by wet-chemical synthesis. Journal of Alloys and Compounds, v. 732, p. 705-715, 2018. DOI: 10.1016/j.jallcom.2017.10.219. Disponível em: http://repositorio.ipen.br/handle/123456789/27982. Acesso em: 18 Apr 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.