Compositional dependence of red photoluminescence of Eu3+ ions in lead and bismuth containing borate glasses.

Herein, heavy metal borate glasses activated with different concertation of Eu 2 O 3 were prepared via the melt quench method. The Eu3+ concentration effect on photoluminescence (PL) properties of prepared glasses was investigated and discussed in detail to understand their utility in solid-state lighting and other photonic applications. The present work explains the suitability of two heavy metal oxides such as PbO and Bi 2 O 3 for Eu 2 O 3 doping to develop the glassy materials for photonic applications. The PL intensity was increased with an increase in Eu3+ content in PbO framed borate glasses while in Bi 2 O 3 containing borate glasses the PL intensity was decreased at higher concentration due to concentration quenching. The Judd–Ofelt parameters and the radiative properties suggest the heavy metal borate glass hosts activated with 1 mol % of Eu3+ were potential materials for red light-emitting devices under blue light excitations. The Lifetime values of the PbO framed glasses were greater compared to Bi 2 O 3 framed borate glasses which suggest the borate glass host containing high PbO content is more precisely suitable than Bi 2 O 3 containing borate glass for solid-state lighting applications under blue light excitation. Image 1 • Photoluminescence properties of Eu3+ ions in PbO and Bi 2 O 3 containing borate glasses were investigated. • The PbO containing glasses activated with 1 mol % of Eu 2 O 3 were exhibited improved spectroscopic and luminescence properties. • Studies suggest the PbO containing glasses are beneficial for solid state lighting application under blue light excitation. [ABSTRACT FROM AUTHOR]