Synthesis of Eu2+-doped A-site and oxygen-deficient perovskite related host for photoluminescent materials

Perovskite‐related compounds have been investigated in many fields, because they have various unique properties due to their compositions and structures which are characterized by various combinations of the A and B cations. In addition, defect perovskite‐type compounds have also been investigated in many areas, especially as ion conductors. In this study, we used the A‐site and oxygen‐deficient perovskite, Sr3Al2O6, as a photoluminescent host material. This means that the defect sites were able to substitute several ions. We investigated the A3Al2O6:Eu2+ phosphor material (A = Mg, Ca, Sr, Ba) produced by a solid state reaction in several kinds of atmospheres. Based on our results, the phosphor showed wide excitation and emission bands of 300–400 nm and 450–600 nm, respectively. The emission color control depended on the A‐site substitution ratio. It is a very useful phosphor for white LEDs. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)