Photoluminescence of doped La10S14O

摘要

The rare‐earth oxysulfide La10S14O, doped with cerium, emits a bright luminescence band peaking around 6350 A˚ at room temperature. This red emission is quenched by copper impurities inadvertently present in insufficiently purified La10S14O. The Cu impurity in turn brings forth an emission band peaking around 7200 A˚. The red 6350‐A˚ luminescence has technological importance for color TV screen and luminescent lamp application. We report on the photoluminescence properties of doped La10S14O and on refinements of its structure determination.