Optical spectroscopy of borate glasses, doped with europium

I.I. Kindrat,V.O. Protsiuk,B.V. Padlyak,I.M. Teslyuk,A. Drzewiecki,V.T. Adamiv,Ya.V. Burak

doi:10.1109/omee.2014.6912379

Abstract

The high optical quality glasses with Li 2 B 4 O 7 :Eu, CaB 4 O 7 :Eu, and LiCaBO 3 :Eu compositions containing 0.5 and 1.0 mol. % Eu 2 O 3 have been obtained by standard glass technology. Using electron paramagnetic resonance (EPR) and optical spectroscopy it was shown that the Eu impurity is incorporated into the Li 2 B 4 O 7 , CaB 4 O 7 , and LiCaBO 3 glasses network as Eu 3+ (4f 6 , 7 F 0 ) ions, exclusively. All observed f - f transitions of the Eu 3+ centres in optical absorption, luminescence excitation and emission spectra were identified. Luminescence kinetic shows single exponential decay with different lifetimes for Eu 3+ centres in the Li 2 B 4 O 7 , CaB 4 O 7 , and LiCaBO 3 glasses.

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