Enhancement of SrSi2O2N2:Eu2+ phosphor by means of oxygen to nitrogen control

Mechanism of the Luminescence Enhancement of SrSi2N2O2:Eu2+ Phosphor via Manganese Addition

“…The starting materials were high-purity SrCO 3 (Abcr, 99.99%), SiO 2 (Merck, 99%), and Si 3 N 4 (UBE, >98%). The proportion of Si 3 N 4 /SiO 2 was 1.8/0.2 because, as we verified and reported elsewhere, such a ratio of Si precursors enables obtaining the pure triclinic phase of the SrSi 2 N 2 O 2 crystal . In the case of europium-doped samples, Eu 2 O 3 (Treibacher, 99.99%) was used.…”

“…It has also been proved that phosphors with higher QYs can be obtained by adding alkali carbonates or by using an appropriate ratio of Si precursors in the SrSi 2 N 2 O 2 :Eu synthesis, although the phase compositions of the resultant materials are complex. The presence of additional phases can affect the shape and position of the luminescence spectrum of the phosphor, as well.…”

Dual fluorescence properties and enhanced thermal stability of SrSi2O2N2:Eu2+ phosphors by coupling with g-C3N4

“…The PLE spectrum consists of structural bands associated with the parity-allowed transition between the ground state and the excited states of the configuration of Eu 2+ ions. 49 The PLE spectrum of the SSON/CN composites was recorded by monitoring the emission peak at 460 nm and 525 nm. The excitation band of SSON/CN composites monitored at 460 nm is similar to that from pure g-C 3 N 4 .…”