Novel efficient phosphors on the base of Mg and Zn co-doped SrTiO3:Pr3+

Synthesis of (Ca, Zn)TiO3:Eu3+ red phosphors via the sol–gel method and their luminescence properties

“…The incorporated Zn will form defect centers under the conduction band of the CaTiO 3 host, which can store free electrons and make the energy transfer from CaTiO 3 host to Eu 3+ ions more effective. Similar phenomena were reported in Mg 2+ and Zn 2+ doped SrTiO 3 :Pr 3+ phosphors [39] . However, when the content of Zn exceeds 20mol%, there is a little…”

“…However, when the concentration of Zn is increased to 20 mol%, the phase of ZT becomes quite clear. This indicates that the addition of Zn to CTE would result not only in the formation of the (Ca, Zn)TiO 3 solid-solution, but also in the formation of the ZT second phase due to the solubility limitation, which increases with the firing temperature [39] . It is obvious that the ZT phase gradually enhances and the main phase of CTE gradually weakens with the increase of Zn concentration, indicating that the ZT phase might have a significant influence on crystallization of CTE.…”

Spectroscopic and crystal field analysis of absorption and photoluminescence properties of red phosphor CaAl12O19:Mn4+ modified by MgO

“…Therefore, for a white light LED with higher color rendering and high efficiency, it is feasible to mix a high efficient red phosphor into YAG:Ce. We also note that SrTiO 3 :Pr 3+ co-doped with Mg and Zn has been reported recently to be a promising red phosphor [8].…”

Luminescent properties of Pr3+ doped (Ca, Zn) TiO3: Powders and films

“…Ryu et al [27] found the enhancement of both the fluorescence and phosphorescence in Mg 2+ and Zn 2+ co-doped SrTiO 3 :Pr 3+ powders. They also proposed a defect energy level which is just below the conduction band of SrTiO 3 , which makes the energy transfer from SrTiO 3 host to Pr 3+ ions more effective.…”