Combustion derived single phase Y₄Al₂O₉:Tb³⁺ nanophosphor: crystal chemistry and optical analysis for solid state lighting applications

Abstract

Cool green light emanating monoclinic Y4−xAl2O9:xTb3+ (x = 1–5 mol%) nanophosphors have been fabricated through gel-combustion method.

Exploring the role of neutral ligands in modulating the photoluminescence of samarium complexes with 1,1,1,5,5,5‐hexafluoro‐2,4‐pentanedione

“…Materials with a CCT ranging from 3200 to 4000 K are classified as neutral light sources [63, 64]. Calculation of the CCT values was performed using Equation (5) [65, 66]: $$$$ CCT=-437{n}^3+3601{n}^2-6861n+5514.31. $$$$ …”

Cool green-emissive Y2Si2O7:Tb3+ nanophosphor: auto-combustion synthesis and structural and photoluminescence characteristics with good thermal stability for lighting applications

“…However, four distinct luminous bands of Tb 3+ ion are characterized and located at about 491 nm ( 5 D 4 / 7 F 6 ), 544 nm ( 5 D 4 / 7 F 5 ), 589 nm ( 5 D 4 / 7 F 4 ) and 624 nm ( 5 D 4 / 7 F 3 ). 38,39 The emission peak at 491 nm is the only one that is allowed to be electric-dipole (ED); however, the transitions associated with the other three emission peaks are permitted to be both electric and magnetic-dipole (ED + MD). 40 According to research, the green emission of the YPS:xTb 3+ (x = 0.01-0.06 mole) nanophosphor is caused by the strongest emission peak that coincides with the 5 D 4 / 7 F 5 (544 nm) transition.…”

A green light emissive LaSr2AlO5:Er3+ nanocrystalline material for solid state lighting: crystal phase refinement and down-conversion photoluminescence with high thermal stability

“…Here, I is the luminous intensity, t is the time, A 1 and A 2 are tting parameters, and s 1 and s 2 are the slow and fast components. The average lifetime may also be estimated by putting the values of A 1 , A 2 , s 1 and s 2 into the following eqn (11).…”

“…[6][7][8][9] Compared to traditional incandescent and halogen lights, LEDs and w-LEDs have the benets of low energy consumption, durability, extended life, the absence of mercury, and environmental friendliness. [10][11][12] Due to their benets, LEDs and w-LEDs have a wide variety of potential applications in the elds of display technology and lighting.…”