Abstract

The structures and luminescent properties of a series of Eu 2+ doped Ba and Sr borates have been investigated. From this study, a simple structural relationship is established that distinguishes violet and blue emitting compounds from those that emit at longer wavelengths (> 500 nm). In this model, emphasis is placed on the coordination environments of the O atoms. Borates containing O atoms highly coordinated by heavy alkaline-earth metal atoms produce longer wavelength Eu 2+ emission.

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