Research progress of Mn doped phosphors

Abstract

In this review article, Mn applications have been divided into three parts. We provide an overview of recent progress in developing Mn 4+ doped red phosphors for promising application in warm white light-emitting diodes. In addition, we summarize reports on Mn 2+ co-doped Eu 2+ or Ce 3+ phosphors that can produce white light with outstanding color rendering index (CRI) and color coordinates via energy transfer processes, and report the application of Mn 2+ in green to NIR phosphors.

Thermally stable La2LiSbO6:Mn4+,Mg2+far-red emitting phosphors with over 90% internal quantum efficiency for plant growth LEDs

“…Mn 4+ ions can be doped into the octahedral sites in the host as an activator, 31,32 resulting in the efficient red or far-red emissions which are signicant for plant growth. [33][34][35][36][37] La 2 -LiSbO 6 compound with double-perovskite structure, which contains two octahedral structures, [SbO 6 ] and [LiO 6 ], have be reported by M. L. López et al 38 In this paper, La 2 LiSbO 6 :-Mn 4+ ,Mg 2+ (LLS:Mn 4+ ,Mg 2+ ) far-red-emitting phosphors have been systematically studied. Under the excitation of 338 nm, LLS:0.3%Mn 4+ ,1.6%Mg 2+ phosphors exhibited intense far-red emission around 712 nm ( 2 E g / 4 A 2g transition), which matched well with the absorption spectrum of phytochrome P FR .…”

Temperature-Dependent Luminescence of Red-Emitting Ba2Y5B5O17: Eu3+ Phosphors with Efficiencies Close to Unity for Near-UV LEDs

“…Mn 4+ -doped inorganic materials show efficient and sharp line red luminescence in the 600-750 nm spectral range. However, only phosphors based on fluoride host matrices (for instance, K 2 SiF 6 :Mn 4+ , BaTiF 6 :Mn 4+ ) possess suitable emission for white LEDs, i.e., below 650 nm [3,15,16].…”

Deep-red emitting Mg2TiO4:Mn4+ phosphor ceramics for plant lighting

“…The broad excitation bands in the near ultraviolet (nUV) and the blue region of Mn 4+ are associated with the 4 A 2g → 4 T 1g and 4 A 2g → 4 T 2g transitions while the red emission is associated with the 2 E g → 4 A 2g transition. The emission peak of Mn 4+ doped materials is closely related to the host matrix, such as uorides and oxides [11][12] . Hence, selecting a suitable host material is the key point to obtain the luminescence properties needed by plant lighting.…”