Spectroscopic characteristics and optimization of (Gd³⁺/Eu³⁺) co-doped in alkal borate glasses for solid state lighting material

Abstract

The physical, structural, and luminescence properties of lithium aluminum borate glasses as a function of Gd2O3 and Eu2O3 concentration were reported. The glasses composition of 25Li2O–5Al2O3-YGd2O3-(70-Y-Z)B2O3-ZEu2O3 system was successfully synthesized through a conventional melt-quenching technique. The various Gd2O3 concentration, 2.5 mol% is suitably added into the host composite, supporting by X-ray induced luminescence and photoluminescence analysis. The influence of the Eu2O3 concentration doped glasses system has been investigated in different concentrations of Eu3+ ions. It was found that the emission intensity increase with an increase of Eu2O3 concentration up to 3.0 mol% (luminescence quenching. The maximum intensity peaks were located at 614 nm (red emission), which was due to 5 D0→7 F2 transitions of Eu3+ ions. The decay profile is measured to prove the occurrence of maximum energy transfer efficiency (Eu3+-Eu3+) obtained is as high as 15.36% for their potential candidature in solid state device applications.