Tunable emissions via the white region from Sr₂Gd₈(SiO₄)₆O₂:RE³⁺ (RE³⁺: Dy³⁺, Tm³⁺, Eu³⁺) phosphors

Abstract

Sr2Gd8(SiO4)6O2 is an excellent host lattice for tunable emissions via the white-light region when co-doped with suitable trivalent rare-earth ions.

Size Effect in Novel Red Efficient Garnet Nanophosphor

“…Rare earth (RE) doped materials are being given great attention in the field of lighting, lasers, displays, and structural analysis because of their unique intraconfigurational f−f transitions, which occur as sharp and intense emission lines. 1 One of most commonly RE ions used for doping of different matrices is Eu 3+ , due to its simple electronic energy level scheme among the RE ions. Eu 3+ is a preferable choice as an activator ion with red emission from the 5 D 0 state, which has been used in lighting and displays.…”

Novel red-emitting LiGd(WO4)2:Eu3+phosphor with high thermal stability and high color purity for application in white light-emitting diodes

“…19 Consequently, coating red-, green-, and blue-emitting phosphors on UV LED chips has been considered as an effective method to produce warm white light with high color rendering index (R a 4 90) and low correlated color temperature, which is expected to dominate the market in the near future. [20][21][22] However, it is difficult to find a suitable red-emitting phosphor for trichromatic WLEDs, considering that the commercial red phosphor (Y 2 O 2 S:Eu 3+ ) has some evident disadvantages in terms of poor chemical stability under UV radiation and its fluorescent efficiency is lower than that of the BaMgAl 10 O 17 :Eu 2+ (blue-emitting) and ZnS:Cu + , Al 3+ (greenemitting) phosphors. 2 Moreover, some sulfides are always blended in them, which cause environmental pollution.…”

Tunable luminescence and electrical properties of cerium doped strontium aluminate (SrAl2O4:Ce3+) phosphors for white LED applications

“…Either exchange interactions occur at a smaller value of R c (<0.5 nm), or electric multipolar interactions prevail. In the case of SrAl 2 O 4 : Ce 3+ phosphors, the value of R c was calculated to be 1.540 nm, hence the sample exhibits electric multipolar interactions [ 36 ].…”