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Luminescence and decay times Eu(III) and Nd(III) in polymer electrolytes

Published online by Cambridge University Press:  31 January 2011

L. D. Carlos  and
M. Assunção
L. D. Carlos*
Affiliation:
Departamento de Física, Universidade de Aveiro, 3800 Aveiro, Portugal
M. Assunção
Affiliation:
Departamento de Física, Universidade de Aveiro, 3800 Aveiro, Portugal
*
a)Address all correspondence to this author.
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Abstract

Time-resolved spectroscopy of poly(ethylene) oxide (PEO) and poly(propylene) oxide (PPO) electrolytes containing different concentrations of Eu3+ and Nd3+ ions is reported. A description of the main luminescence features of the Nd3+ electrolytes is also presented. Lifetimes regarding the main transitions of the luminescence spectra (5D0 → 7F1,2 and 4D3/2 → 4I11/2 for Eu3+ and Nd3+, respectively) are determined and are presented as a function of temperature in the range of 13 to 310 K. The order of magnitude of the values obtained at room temperature (0.2–0.6 ms and ≈0.7 ms for Eu3+ and Nd3+, respectively) is a further indication of the technological potential of these new polymeric materials. For the Eu3+ ion the thermally activated quenching of the 5D0 → 7F2 luminescence is discussed in terms of the observed energy superposition between the 5D0,1 levels and the ligands-to-metal charge-transfer states.

Type
Articles
Information
Journal of Materials Research , Volume 11 , Issue 8 , August 1996 , pp. 2104 - 2108
Copyright
Copyright © Materials Research Society 1996

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