Reddish-orange-emitting Ca12Al14O33: Sm3+ phosphors with high color purity

Impact of ligand environment on optical, luminescence and thermometric behavior of A3(PO4)2:Sm3+ (A = Ca, Sr) phosphors

“…Here, S a and S R are absolute sensitivity and relative sensitivity, respectively. The constants k and ΔE represent the same meaning and value as indicated in Equation (6). Equations ( 8) and ( 9) demonstrate that the fluorescent intensity ratio sensitivity grows when pairs of energy with higher energy differences are utilized.…”

“…To improve the luminous performance of the phosphor, an adequate activator ion and host matrices are necessary. The phosphors for WLEDs have been described in the form of inorganic phosphates, aluminates, borates, niobate, silicate, tungstate, vanadate, germanate, and molybdate, all activated using the different rare earth activator ions [5][6][7][8][9][10][11][12][13]. Due to their multiple 4f transition characteristics, rare earth ions may readily acquire several emission light hues (blue, green, yellow, and red), making them significant activators [5].…”

“…Due to their multiple 4f transition characteristics, rare earth ions may readily acquire several emission light hues (blue, green, yellow, and red), making them significant activators [5]. The Sm 3+ ions serve as significant activator ions when they are introduced into different inorganic lattices and generate emission in the red, orange-red, and orange areas due to electronic transitions from excited energy level 4 G 5/2 to ground energy levels 6 H J/2 (J = 5, 7, 9, 11). It has been shown that the emission of near ultraviolet (NUV) LED chips is a good match with the normal NUV 4f absorption of Sm 3+ ions [14].…”