Photoluminescence properties of broadband deep-red-emitting Na2MgAl10O17:Mn4+ phosphor

Novel Mn4+-activated LiLaMgWO6far-red emitting phosphors: high photoluminescence efficiency, good thermal stability, and potential applications in plant cultivation LEDs

“…[22][23][24][25][26][27][28][29][30][31][32] Recently, it was reported that Mn 4+ ions with a far-red emission of around 710 nm can also be used for plant cultivation LEDs because the emission range due to the 2 E g / 4 A 2g transition was in accordance with the absorption band of phytochrome P FR (centers at 730 nm). 33 Moreover, the Mn 4+ ion can be excited by both blue and near-ultraviolet (NUV) LED chips and exhibits wide absorption bands, which broaden the application eld.…”

Mn4+-activated BaLaMgSbO6 double-perovskite phosphor: a novel high-efficiency far-red-emitting luminescent material for indoor plant growth lighting

“…48,49 Upon 340 nm excitation, the obtained emission spectrum had a narrow emission band in the wavelength range of 650-800 nm peaking at 700 nm, which was attributed to the spin-forbidden 2 E g / 4 A 2g transition of Mn 4+ . [50][51][52] The full width at half maximum (FWHM) of the emission band was about 38 nm, which was narrower than that of Ca 3 La 2 W 2 O 12 :Mn 4+ (FWHM: 39 nm), Li 2 MgTiO 4 :Mn 4+ (FWHM: 46 nm), and Na 2 MgAl 10 O 17 :Mn 4+ (FWHM: 105 nm). 1,32,51 The CIE chromaticity coordinates of BLMS:0.6%Mn 4+ sample were calculated and illustrated in Fig.…”

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

“…5(b), the emission intensity of the LLS:0.3%Mn 4+ ,1.6%Mg 2+ phosphors at 423 K remained about 58% compared that at 303 K, which was better than that of Ca 3 La 2 W 2 O 12 :Mn 4+ (29%), CaLaMgNbO 6 :Mn 4+ (45%), SrLaScO 4 :Mn 4+ (15%), and Gd 2 -ZnTiO 6 :Mn 4+ (27.2%), [61][62][63][64] indicating that the LLS:0.3% Mn 4+ ,1.6%Mg 2+ phosphors had good thermal stability. The corresponding activation energy can be obtained by using the following expression: 65,66 IðTÞ…”