New aluminate-germanate hosts with garnet structure for solid state lighting applications

• Published in: Optical materials Vol. 129; p. 112469
• Main Authors: Lohe, P.P., Nandanwar, D.V., Belsare, P.D., Moharil, S.V.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.07.2022
• Subjects: Combustion synthesis; Garnet; Luminescence; Phosphor; Garnet; Combustion synthesis; Phosphor; Luminescence
• ISSN: 0925-3467; 1873-1252
• DOI: 10.1016/j.optmat.2022.112469

In this paper, two newly developed garnet phosphors, BaY2Al4GeO12:Ce3+ and SrY2Al4GeO12:Ce3+ are reported. The materials were prepared by simple, facile combustion synthesis. The emission for these phosphors is in yellow region when excited by blue light. Decay for BaY2Al4GeO12:Ce3+ is nearly exponential with average lifetime of 70 ns. In case of SrY2Al4GeO12:Ce3+, decay curve could be fitted to second order exponential with fast component τ1 = 24.5 ns and slow component τ2 = 57 ns. Capability of excitation by blue LED, yellow emission, simple preparation make these phosphors suitable for white LED lamp fabrication. These could be suitable replacements for YAG:Ce. [Display omitted] •Combustion synthesis of newly developed MY2Al4GeO12:Ce3+ (M = Sr, Ba) reported.•Phosphor prepared in single step at 500 °C.•PL, PLE, lifetime and colour coordinates measurements done.•Blue excitation, yellow emission, useful for LED lamp.