Luminescence and energy transfer of Mn2+ co-doped SrSi2O2N2:Eu2+ green-emitting phosphors

Synthesis of BaSi2O2N2:Ce3+,Eu2+ Phosphors and Determination of their Luminescence Properties

“…In the present study, Fig. 6 shows that, for constant Eu 2+ concentration, maximum emission intensity was recorded for y =0.002, whereas the intensity decays at higher Ce 3+ content, likely due to aggregation of Ce 3+ ions 25,26 . Similar results have been reported in an earlier study on Mn 2+ ‐ or Ce 3+ ‐co‐doped SrSi 2 O 2 N 2 :Eu 2+ 25,26 .…”

“…6 shows that, for constant Eu 21 concentration, maximum emission intensity was recorded for y 5 0.002, whereas the intensity decays at higher Ce 31 content, likely due to aggregation of Ce 31 ions. 25,26 Similar results have been reported in an earlier study on Mn 21 -or Ce 31 -co-doped SrSi 2 O 2 N 2 :Eu 21 . 25,26 With respect to the emission intensity of Ce 31 -free phosphor (i.e., y 5 0), co-doping enabled an increase by 52% (at y 5 0.002).…”

An orange emitting phosphor Lu2−CaMg2Si2.9Ti0.1O12:xCe with pure garnet phase for warm white LEDs

“…Most of WLEDs use Y 3 Al 5 O 12 :Ce 3+ (YAG:Ce) garnet phosphors dispersed in a polymer matrix as a light conversion layer and then coated on top of a blue InGaN chip [5]. YAG:Ce, as a typical commercial yellow phosphor, has poor color rendering index (CRI) value and high color temperature [6][7], and it is not suitable for general indoor lighting because the warm white lights cannot be achieved due to the deficiency of red spectral component [8][9][10].…”

Equation of state for Eu-doped SrSi2O2N2

“…It exhibits a large energy band gap (5.6 eV, 26 6.67 eV 27 ). When activated with Eu 2+ ions, this compound shows valuable luminescence properties-in particular it is suitable, as a component, for white LEDs; 14 a very efficient luminescence is observed even at 200…”