Luminescence of Rare Earth‐Activated Tellurate Perovskites

Abstract

, where and , crystallize with ordered (Fm3m) or ordered‐distorted perovskite structures, and can be used as hosts for rare earth activated luminescence. Rare earths (Ln3+) were introduced according to the substitution, . The Eu3+ emission depends strongly on the ordering of the perovskite structure. The transition is dominant when Eu3+ occupies a site with symmetry in the Fm3m ordered perovskite, whereas the Eu3+ emission is the transition in the ordered‐distorted perovskite structure. Only is an effective host for Tb3+‐, Dy3+‐, and Er3+‐activated luminescence.