Repositório Institucional da Universidade de Aveiro > Departamento de Física > FIS - Artigos >
 Enhanced photoluminescence features of Eu(3+)-modified di-ureasil-zirconium oxocluster organic-inorganic hybrids
Please use this identifier to cite or link to this item http://hdl.handle.net/10773/7041

title: Enhanced photoluminescence features of Eu(3+)-modified di-ureasil-zirconium oxocluster organic-inorganic hybrids
authors: Ferreira, R. A. S.
Oliveira, D. C.
Maia, L. Q.
Vicente, C. M. S.
André, P. S.
Bermudez, V. Zea
Ribeiro, S. J. L.
Carlos, L. D.
keywords: Organic/inorganic di-ureasil hybrids
Emission quantum yields
issue date: 2010
abstract: In this work, a series of transparent di-ureasil hybrids containing different amounts of methacrylic acid modified zirconium tetrapropoxide (ZrMcOH) nanoclusters (5-85 mol%) and incorporating EuCl(3) and [Eu(tta)(3)(H(2)O)(2)](tta = thenoyltrifluoroacetonate) complex were prepared. These hybrids are multi-wave-length emitters due to the convolution of the host intrinsic emission (electron-hole recombinations occurring in siliceous and urea cross-linkages) Eu(3+) intra-4f(6) transitions. The ZrMcOH incorporation deviates the maximum excitation wavelength of the hybrid host intrinsic emission from the UV (365 nm) to the blue (420 nm) and enhances the absolute emission quantum yield from 6.0 +/- 0.6% to 9.0 +/- 0.9%, and contributes to an increase in the (5)D(0) lifetime values, quantum efficiency due to a decrease in the non-radiative transition probability and OH groups coordinated to the Eu(3+) ions. (C) 2010 Elsevier B.V. All rights reserved.
URI: http://hdl.handle.net/10773/7041
ISSN: 0925-3467
publisher version/DOI: http://dx.doi.org/10.1016/j.optmat.2010.05.028
source: Optical Materials
appears in collectionsFIS - Artigos

files in this item

file description sizeformat
2010_om.pdf628.24 kBAdobe PDFview/open
Restrict Access. You can Request a copy!

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.


Valid XHTML 1.0! RCAAP OpenAIRE DeGóis
ria-repositorio@ua.pt - Copyright ©   Universidade de Aveiro - RIA Statistics - Powered by MIT's DSpace software, Version 1.6.2