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Luminescence of BaBrI and SrBrI single crystals doped with Eu~(2+)

机译:Eu〜(2+)掺杂BaBrI和SrBrI单晶的发光

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摘要

The crystal growth procedure and luminescence properties of pure and Eu2+-doped BaBrI and SrBrl crystals are reported. Emission and excitation spectra were recorded under ultraviolet and vacuum ultraviolet excitations. The energy of the first Eu2+ 4f-5d transition and SrBrl band gap are obtained. The electronic structure calculations were performed within GW approximation as implemented in the Vienna Ab lnitio Simulation Package. The energy between lowest Eu2+ 5d state and the bottom of conduction band are found based on luminescence quenching parameters. The vacuum referred binding energy diagram of lanthanide levels was constructed using the chemical shift model. (C) 2018 Elsevier B.V. All rights reserved.
机译:报道了纯的和掺杂Eu2 +的BaBrI和SrBrl晶体的晶体生长过程和发光特性。在紫外和真空紫外激发下记录发射和激发光谱。获得了第一个Eu2 + 4f-5d跃迁的能量和SrBrl带隙。电子结构计算是在Vienna Ab lnitio Simulation Package中实现的GW近似范围内进行的。根据发光猝灭参数发现最低Eu2 + 5d态与导带底部之间的能量。使用化学位移模型构建了镧系元素水平的真空参照结合能图。 (C)2018 Elsevier B.V.保留所有权利。

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