White-light emission of Ca2La8(GeO4)6O2: Tb3+/Sm3+ nanocrystalline phosphors for solid-state lighting applications

RE3+ (RE3+ = Tm3+, Tb3+ and Sm3+) ions activated Y6WO12 phosphors: Synthesis, photoluminescence, cathodoluminescence and thermal stability

“…The orange color emission for Sm 3þ ions doped samples is primarily due to the magnetic dipole (MD) 5 D 4 / 7 F 5 electronic transition. According to the selection rules (DJ ¼ 0 and ±1 represent MD transitions, and DJ ¼ 2, 4, and 6 represent electric dipole (ED) transitions), the peaks below 600 nm are purely due to the MD transition (DJ ¼ 0) and above 600 nm are purely due to the ED transitions (DJ ¼ 1 and 2) [30]. The effect of concentration on the emission was also studied by varying the dopant concentration.…”

Solution Combustion Synthesis and Energy Transfer in LaMgAl11O19:Tb3+/Sm3+ Tunable Phosphor

“…5(a)[(iv)] [28]. All the excitation spectra of LMA phosphor at different emission wavelengths showed the common excitation band at 375 nm attributable to 7 F6→ 5 G6 of Tb 3+ ion and 6 H5/2→ 6 P7/2 of Sm 3+ ion [29]. 5.…”

A Novel Single‐Phase White Phosphor Gd7O6(BO3)(PO4)2:Dy3+

“…In recent years, white light-emitting diodes (WLEDs) have been widely acknowledged for their cost-effectiveness, energy efficiency, high luminous efficacy, energy saving, environmental friendliness, and prolonged lifespan. [1][2][3][4] At present, the commonly used solution for obtaining WLEDs is to combine YAG:Ce 3þ yellow phosphor with InGaN blue LED chip; however, the color rendering of the generated white light is inadequate, failing to meet the demands of high-quality color lighting. Due to its excellent color fidelity, high luminous efficiency, and rmarkable stability, single-phase white phosphors have been of great research value.…”

“…[5][6][7] The Dy 3þ ion exhibits two main emission bands, centered at 488 and 574 nm, respectively, corresponding to the 4 F 9/2 ! 6 H 15/2 (electrical dipole) and 4 F 9/2 ! 6 H 13/2 (magnetic dipole) transitions.…”