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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 28, Iss. 4 — Apr. 1, 2011
  • pp: 649–657

Effect of solvent on the up- and downconversion emissions of Y 2 O 3 : Yb 3 + Er 3 + nanofibers synthesized by a hydrothermal method

Jorge Oliva, Octavio Meza, Luis A. Diaz-Torres, Pedro Salas, Elder De la Rosa, Anatolio Martinez, and Carlos Angeles-Chavez  »View Author Affiliations


JOSA B, Vol. 28, Issue 4, pp. 649-657 (2011)
http://dx.doi.org/10.1364/JOSAB.28.000649


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Abstract

We report on the structural, morphological, and luminescent properties of Y 2 O 3 : Yb 3 + ( 2 % ) Er 3 + ( 1 % ) nanofibers synthesized by a hydrothermal method as a function of the solvent composition ethanol/water. The average length and diameter of the nanofibers ranges from 1.1 to 2.3 μm , and from 50 to 110 nm , respectively. A cubic crystalline structure was obtained, and no effect of the solvent was observed. However, the increment of OHs, because of the increment of water, modifies the quality of the nanofibers. Such impurities improve the emission bands under 940 and 490 nm excitation, especially the red band, via multiphonon relaxation. Relaxation dynamics is explained, based on direct and back energy transfer, multiphonon relaxation, and cross-relaxation. The direct energy transfer coefficients ( C b 2 , C b 4 , and C b 5 ) calculated by the proposed theoretical model point out the fact that upconverted emissions are notably favored by the increment of OHs. The energy backtransfer ( C 5 b ) and cross-relaxation ( C 51 ) coefficients depend only on the ion concentration and not on the OH content.

© 2011 Optical Society of America

OCIS Codes
(160.2540) Materials : Fluorescent and luminescent materials
(160.5690) Materials : Rare-earth-doped materials
(190.7220) Nonlinear optics : Upconversion
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence
(160.4236) Materials : Nanomaterials

ToC Category:
Materials

History
Original Manuscript: June 11, 2010
Revised Manuscript: December 22, 2010
Manuscript Accepted: January 1, 2011
Published: March 9, 2011

Citation
Jorge Oliva, Octavio Meza, Luis A. Diaz-Torres, Pedro Salas, Elder De la Rosa, Anatolio Martinez, and Carlos Angeles-Chavez, "Effect of solvent on the up- and downconversion emissions of Y2O3:Yb3+−Er3+ nanofibers synthesized by a hydrothermal method," J. Opt. Soc. Am. B 28, 649-657 (2011)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-28-4-649

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