A Survey of a Group of Phosphors, Based on Hexagonal Aluminate and Gallate Host Lattices

Abstract

A group of photoluminescent materials, which may have great influence on future fluorescent lamp development, is surveyed. The materials are based on hexagonal aluminates and gallates which are structurally related to the magnetoplumbites and (β‐alumina. When activated with Mn²⁺, Eu²⁺, Tl²⁺, Ce³⁺ , and Tb³⁺ , or combinations of these ions, they are phosphors, some of them having a high efficiency and good temperature dependence.