Enhanced luminescence performances of BaLaMgTaO6:Mn4+ red phosphor by Bi3+, Ca2+ doping for indoor plant lighting supplementary LED

A new perovskite BaLaMgTaO6:Mn4+ (BLMTO:Mn4+) red phosphor was synthesized for the first time via the high-temperature solid-state method. The emission band of the phosphor ranges from 650 to 750 nm, which matches well with the absorption band of PFR and PR. By doping of Bi3+ and Ca2+ ions in the BLMTO: Mn4+ phosphor, a 4.76-fold enhancement in the luminescence emission intensity was achieved. The optimized BLMTO:0.5%Mn4+, 1.5%Bi3+, 2%Ca2+ phosphor exhibited a high quantum efficiency of 65% and a high color purity of 98.1% with the chromaticity coordinate (CIE) at (0.733, 0.267). Finally, a LED device was fabricated with the BLMTO:0.5%Mn4+, 1.5%Bi3+, 2%Ca2+ phosphor for further agricultural lighting, which emits warm white light with a low color temperature of 3549 K. The result indicates that the BLMTO:Mn4+, Bi3+, Ca2+ phosphors have a potential for applications in agricultural cultivations. (c) 2021 Elsevier B.V. All rights reserved.

Automated summary

A new perovskite BaLaMgTaO6:Mn4+ red phosphor was synthesized for the first time via the high-temperature solid-state method. The doping of Bi3+ and Ca2+ ions in the phosphor led to a significant enhancement in luminescence emission intensity, showing potential for agricultural lighting applications. The optimized phosphor exhibited high quantum efficiency and color purity, making it suitable for warm white light emission in agricultural cultivations.