Preparation of nanophosphors of SnO2: Eu3+, Tb3+, Dy3+ by coprecipitation method
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2017
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INTERNATIONAL CONFERENCE ON LUMINESCENCE, 18th
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In recent years, white light emitting diodes (W-LEDs) have been replaced the conventional
incandescent and fluorescent lamps due to the lower manufacturing cost, high Color
Rendering Index (CRI) and luminescence efficiency [1,2]. In this work, the simultaneous
incorporation of the Tb3+,Eu3+,Dy3+- doped SnO2 matrix were prepared with the
coprecipitation method as a possible alternative to solid state synthesis. This procedure is
environmental friendly, producing materials with high crystallinity as well as controlled
particle size. An aqueous solution of RECl3·6H2O was added in a solution containing
SnCl2·2H2O, HNO3 (1 mol·L-1) and ethanol to obtain the phosphor. Subsequently, in resulting
solution was added NH4OH (7 mol·L-1) aqueous solution that lead to the formation of a white
precipitate aged in mother liquor for two days. Finally, the as-prepared precipitate was
washed with distilled water several times to eliminate chloride and nitrate anions. The RE3+
doping concentrations in SnO2
were identical for each rare earth ion in following
concentrations: 0.5, 1.0, 2.0, 3.0 and 4.0 mol-% of the SnIV amount. The luminescence
materials were characterized by X-ray powder diffraction (XPD), thermal analysis (TG),
infrared absorption spectroscopy (FTIR) and UV excited photoluminescence. The CIE
parameters and the color correlated temperature (CCT) are obtained in order to characterize
the color emission as well as to apply in cold and warm W-LEDs.
Como referenciar
SALVADOR, F.F.S.; FELINTO, M.C.F.C.; PEDROSO, C.C.S.; BARBOSA, H.P.; BRITO, H.F. Preparation of nanophosphors of SnO2: Eu3+, Tb3+, Dy3+ by coprecipitation method. In: INTERNATIONAL CONFERENCE ON LUMINESCENCE, 18th, August 27 - September 01, 2017, João Pessoa, PB. Abstract... p. 385-385. Disponível em: http://repositorio.ipen.br/handle/123456789/28697. Acesso em: 30 Dec 2025.
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.