Jump to main content
Jump to site search

Issue 43, 2013
Previous Article Next Article

On the unusual photoluminescence of Eu3+ in α-Zn2P2O7: a time resolved emission spectrometric and Judd–Ofelt study

Author affiliations

Abstract

Zn2P2O7:Eu3+ was synthesized and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM); Fourier transformed infrared spectroscopy (FTIR) and photoluminescence (PL) techniques. Based on the time resolved emission spectroscopic investigations (TRES), it was inferred that two different types of Eu3+ ions were present in the zinc pyrophosphate. The first type was a long lived species (∼τ = 1.77 ms) present at relatively few symmetric ‘5-coordinated Zn’ sites, while the second was a short lived species (∼τ = 620 μs) present at symmetric ‘6-coordinated Zn’ sites. This unusual behavior of the trivalent rare earth species could be explained with the help of Judd–Ofelt (J–O) calculations. From the calculations, the radiative (τR) and non radiative (τNR) life times were evaluated for both species. It was observed that the radiative life time of the Eu3+ species present in symmetric environment was higher than that of the species present in the asymmetric environment, which is consistent with the selection rules governing the transition. It was observed that the presence of a very strong non-radiative component at the symmetric site brings down the overall lifetime value. The J–O intensity parameters for all the Eu3+ species present in the pyrophosphate system were calculated adopting standard procedure. Ω4 > Ω2 was found that for short lived species; while for the long lived species, the reverse trend was observed further confirming the correlation between the asymmetry and bonding.

Graphical abstract: On the unusual photoluminescence of Eu3+ in α-Zn2P2O7: a time resolved emission spectrometric and Judd–Ofelt study

Back to tab navigation

Publication details

The article was received on 17 Jun 2013, accepted on 13 Aug 2013 and first published on 16 Aug 2013


Article type: Paper
DOI: 10.1039/C3RA43027H
RSC Adv., 2013,3, 20046-20053

  •   Request permissions

    On the unusual photoluminescence of Eu3+ in α-Zn2P2O7: a time resolved emission spectrometric and Judd–Ofelt study

    S. K. Gupta, M. Mohapatra, S. V. Godbole and V. Natarajan, RSC Adv., 2013, 3, 20046
    DOI: 10.1039/C3RA43027H

Search articles by author

Spotlight

Advertisements