Photoluminescence properties and crystal field analysis of a novel red-emitting phosphor K 2 BaGe 8 O 18 :Mn 4+

Enhanced photoluminescence and energy transfer performance of Y3Al4GaO12:Mn4+,Dy3+ phosphors for plant growth LED lights

“…The tting slope is À1.4229 and the q was calculated to be 4.2687 which is close to 6, indicating that the main quenching mechanism of YAGO:Mn 4+ phosphor is dd interactions. 22,29,30,32 As shown in Fig. 3(c), it is obvious that the substitution of Ga 3+ enhances the intensity of excitation spectra, which indicates these phosphors can be excited easily.…”

“…Therefore, solid solution treatment can improve the luminescence performance and thermal stability. [28][29][30] There are many conditions for solid solution formation, such as similar ion radius size, alike crystal structure or chemical formula, similarity of ion electronegativity, and the same of ion value. For example, Ca 14 Al 10 Zn 6 O 35 31 and Ca 14 Ga 10 Zn 6 O 35 32 has the similar structure, Mn 4+ -doped Ca 14 Al 10 Zn 6 O 35 phosphors show far-red emitting, and the luminescence properties can be improved by substituting Ga 3+ for Al 3+ ion.…”

Dual‐activator luminescence of LuAG:Mn4+/Tb3+ phosphor for optical thermometry

“…The PLE spectrum is obtained by monitoring at 668 nm. There are four bands centered at 312 nm, 347 nm, 370 nm, and 470 nm, assigned to O 2‐ ‐Mn 4+ charge transfer and Mn 4+ : 4 A 2 → 4 T 1 , 4 A 2 → 2 T 2 , and 4 A 2 → 4 T 2 transitions, respectively . 4 A 2 → 4 T 1 and 4 A 2 → 4 T 2 are spin‐allowed transitions and 4 A 2 → 2 T 2 is spin‐forbidden transition according to the spin selection rules of ∆S = 0.…”

Preparation, characterization, and luminescence properties of double perovskite SrLaMgSbO6:Mn4+ far-red emitting phosphors for indoor plant growth lighting

“…4(d) shows the luminescence decay curves of the SLMS:xMn 4+ (x ¼ 0.05%, 0.6%, 0.8%, 1.0%, and 1.2%) phosphors. The decay lifetimes of the as-prepared samples were obtained by using the following double exponential expression: [50][51][52][53]…”