Optical properties of Eu2+ doped antipervoskite fluoride single crystals

D. Daniel, R. Nithya, P. Ramasamy, U. Madhusoodanan
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Abstract

Single crystals of pure and Eu2+ doped LiBaF3 have been grown from melt by using a vertical Bridgman-Stockbarger method. Absorption and luminescence spectra for pure and rare-earth-doped LiBaF3 were studied. At ambient conditions the photoluminescence spectra consisted of sharp lines peaked at ∼359 nm attributed to the 6P7/2→8S7/2 transitions in the 4f7 electronic configuration of Eu2+ and a broad band extending between 370 and 450 nm attributed to Eu2+ trapped exciton recombination. The effect of 60Co gamma irradiation has also been investigated.
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Eu2+掺杂反钙钛矿氟化物单晶的光学性质
用垂直Bridgman-Stockbarger方法从熔体中生长出了纯和掺Eu2+的liaf3单晶。研究了纯和稀土掺杂的liaf3的吸收光谱和发光光谱。在环境条件下,Eu2+的4f7电子组态中的6P7/2→8S7/2跃迁在~ 359 nm处达到峰值,Eu2+捕获的激子复合在370 ~ 450 nm处形成了一个宽带。研究了60Co辐照的影响。
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