Synthesis and characterization of a far-red-emitting Sr2ScNbO6: Mn4+ phosphor for short-day plant cultivation

An efficient rare-earth free deep red-emitting GdGeSbO6:Mn4+ phosphor for white light-emitting diodes

“…6a–h shows the fluorescence decay curves of GdGeSbO 6 : x %Mn 4+ ( x = 0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, and 0.8) phosphors. The luminescence intensity of all samples decayed with time according to the following mono-exponential function eqn (5): 40 where I 0 and I t denote the intensity of the initial emission at moment 0 and the emission intensity at moment t , respectively, A is a constant, and τ is the luminescence lifetime. The GdGeSbO 6 : x %Mn 4+ phosphor lifetimes are 0.3058, 0.3042, 0.2905, 0.2823, 0.2694, 0.2653, 0.2595, and 0.2488 ms matching with x = 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, and 0.8, respectively.…”

A novel Eu3+ activated Ca3Zn3Te2O12 tellurate red phosphor for white LEDs with high color stability and color purity

“…The prerequisite for obtaining better luminescence performance and color purity of phosphors is to choose appropriate matrix materials. 11 So far, numerous types of matrix materials have been reported, such as silicates, 12 titanates, 1 phosphates, 13 tellurites, 14 galliates, 15 niobates, 16 tungstates, 17 etc . Tellurites seem to be a good candidate due to their relatively high thermochemical stability and excellent luminescence efficiency.…”

Enhancing the Luminescence of La3Mg2NbO9:Mn4+ Phosphor through H3BO3 and Charge Compensator Co-Doping for Use in Plant Growth Lamps

“…Fluorescent conversion white-light-emitting diodes (WLEDs) are rapidly replacing traditional illuminant sources with their superior intense brightness, longevity, energy-saving properties, environmental protection, and simple processes, and are gradually becoming mainstream products in the lighting market [ 1 , 2 , 3 , 4 ]. Currently, the mainstream WLEDs in the market obtain white light by compounding Y 3 Al 5 O 12 :Ce 3+ yellow phosphor with InGaN blue LED chips [ 5 , 6 ].…”

“…As a transition metal ion, Mn 4+ has plentiful reserves and a low price compared with traditional rare-earth luminescence centers [14]. In a suitable crystal structure, Mn 4+ ions with a 3d 3 electron configuration can emit bright light, and the emission spectrum is mainly concentrated in the red/far-red wavelength range of 620-740 nm [15,16]. Compared with fluoride phosphors, Mn 4+ -activated oxide phosphors with better chemical stability that are synthesized without the highly corrosive HF have drawn much attention in terms of WLEDs, plant illumination, and infrared illumination [17].…”