CaY₂Si₂S₈:Ce³⁺: a novel green-emitting thiosilicate phosphor for white light-emitting diodes

Abstract

The luminescence of a green-emitting CaY2Si2S8:Ce3+ phosphor and its applicability in fabrication of white LEDs with high CRI and varied CCTs were explored.

Recent progress in luminescence tuning of Ce3+and Eu2+-activated phosphors for pc-WLEDs

“…[25][26][27][28][29][30] In general, phosphors are vital to the development of the WLED lighting and backlight display industry. 39,[41][42][43][44][45][46][47] The emphasis was also be placed on the relationships among crystal structures, luminescence properties, and device performances. Therefore, novel and acceptable fluorescent materials for improving the performances of solid-state lighting must be developed.…”

“…[58][59][60][61][62][63][64][65][66][67][68][69] Commonly, the nephelauxetic effect is linked to the covalency of the crystal. [41][42][43][44][45][46][47]93,95 If the activator ions were surrounded by anion groups, the higher charge density on the anion groups would exert the stronger nephelauxetic effect on activator ions. Thus the covalency of the crystal is related to the electronegativity of anions and the cation-anion distance.…”

2D photonic crystal layer assisted thiosilicate ceramic plate with red‐emitting film for high quality w‐LEDs

“…To determine the dependable approximation of the actual crystal structure for SLSSC, the isomorphic structure data of La 2 PbSi 2 S 8 was adopted as the starting model. This model was also adopted by the previous study for determining the structure of similar thiosilicate BaLa 2 Si 2 S 8 and CaY 2 Si 2 S 8 . The Rietveld refinements were carried out for the host SrLa 2 Si 2 S 8 (SLSS) and the doping sample (5 mol%) SL 1.9 SSC 0.1 from the XRD data, which indicated that the target structure (crystallize into hexagonally with space group R3c (No.…”

Luminescence properties and energy transfer behavior of colour-tunable white-emitting Sr4Al14O25 phosphors with co-doping of Eu2+, Eu3+ and Mn4+

“…Generally, the energy transfer mechanism between the sensitizer (Eu 2+ ) to activator (Mn 4+ ) ions and the relation can be revealed by the Dexter's energy transfer theory: [36][37][38]…”