Photoluminescence properties of Ca9Lu(PO4)7:Ce3+, Mn2+ prepared by conventional solid-state reaction

Morphology Tunable Self‐Assembled Sr2P2O7:Ce3+, Mn2+ Phosphor and Luminescence Properties

“…Ce 3+ can absorb UV light, especially the near‐UV in some crystals, and Mn 2+ can give an enhanced orange‐to‐red emission through a Ce 3+ –Mn 2+ energy transfer. Thus, Ce 3+ , Mn 2+ co‐doping into hosts may supply an approach to the design of new phosphors, for example, Ca 3 Sc 2 Si 3 O 12 :Ce 3+ , Mn 2+ ; Ca 9 Y(PO 4 ) 7 :Ce 3+ , Mn 2+ ; Ca 9 Lu(PO 4 ) 7 :Ce 3+ , Mn 2+ ; Sr 2 Mg(BO 3 ) 2 :Ce 3+ , Mn 2+ ; and Ca 4 Si 2 O 7 F 2 :Ce 3+ , Mn 2+ . Investigations on Ce 3+ and Mn 2+ co‐doped strontium pyrophosphate phosphors, however, have rarely been reported.…”

Giant enhancement of white light emission from Ca9Ln(PO4)7:Eu2+,Mn2+ (Ln = La, Lu, Gd) phosphors achieved by remote aluminum reduction

“…In recent years, various of single-phase white-light-emitting phosphors have been synthesized and investigated, including Ca 3 Sc 2 Si 3 O 12 :Ce 3+ , Mn 2+ [6], Na 3 LuSi 2 O 7 :Eu 2+ , Mn 2+ [7], Sr 2 Y 8 (SiO 4 ) 6 O 2 :Bi 3+ , Eu 3+ [8], Ca 5 (PO 4 ) 3 Cl:Ce 3+ , Eu 2+ , Tb 3+ , Mn 2+ [9], and Ca 9 Y(PO 4 ) 7 :Eu 2+ , Mn 2+ [10]. Among these, the phosphate system single-phase white-light-emitting phosphors, especially for phosphate phosphors with polar whitlockite-type structure, have come into focus owing to their perfect stability and good color reproducibility [10][11][12][13][14][15][16][17][18]. In particular, owing to the forbidden 4 T 1 → 6 A 1 transitions, the emission intensity of Mn 2+ is weak under UV excitation.…”

“…However, the emission of Mn 2+ can be considerably improved by introducing an efficient sensitizer. Eu 2+ has been widely used as such promising sensitizer in many Mn 2+ doped hosts [7,[9][10][11][12][13][14][15][16][17][18]. However, due to the energy transfer and the complex interaction between the donor and the acceptor, the quantum efficiencies of such single-phase white-light-emitting phosphors decreased sharply when emission centres were co-doped into the host.…”

“…In particular, the reducer and the compounds were always separated throughout the whole process of reaction). In the CO atmosphere reduction group, reference samples were calcined at 1000°C for 8 h in an alumina crucible covered with an outer crucible filled with graphite power [13,17]. The final samples were cooled down freely to room temperature and then were re-grounded for further characterization.…”

Large-scale production of spherical Y2O3:Eu3+ phosphor powders with narrow size distribution using a two-step spray drying method

“…[13][14][15][16][17][18][19] Although the process is relatively simple, the resulting powders have unavoidable disadvantages such as non-uniform morphologies and broad particle size distributions of about 2-20 µm. Moreover, the phosphor powders can have inhomogeneous phase distributions due to the uneven mixing of the bulky precursors during the preparation process.…”