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中国物理学会期刊

掺铋BaF2晶体的制备及其近红外发光研究

CSTR: 32037.14.aps.59.2827

Preparation and near-infrared luminescence properties of Bi-doped BaF2 crystal

CSTR: 32037.14.aps.59.2827
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  • 通过温度梯度法制备了Bi2O3:BaF2以及BiF3:BaF2晶体.在Bi2O3:BaF2晶体中观察到了发光峰位于961 nm,半高宽202 nm的超宽带红外发光.在BiF3:BaF2晶体中检测到Bi2+和Bi3+可见区的发光,但是没有观察到红外发光.通过γ射线辐照实现了BiF3:BaF2晶体的近红外发光, 发光峰位于1135 nm,半高宽192 nm.讨论了Bi2O3和BiF3掺杂BaF2晶体的红外发光的机理.

     

    Bi2O3:BaF2 and BiF3:BaF2 crystals were prepared by TGT (temperature gradient method). Near-infrared broadband luminescence was observed in as-grown Bi2O3:BaF2 crystal. The emission band peaks at 961 nm in the range of 850—1250 nm,with FWHM about 202 nm. The luminescence of Bi2+ and Bi3+ ions in the visible region was observed in BiF3:BaF2 crystal, but there was no near-infrared emission. Then the BiF3: BaF2 crystal was exposed to γ-rays in order to reduce valence states of Bi ions. Near-infrared broadband luminescence was observed in γ-irradiated BiF3:BaF2 crystal. The emission band peaks at 1135 nm in the range of 850—1500 nm,with FWHM about 192 nm. The mechanisms of near-infrared luminescence in Bi2O3:BaF2 crystals and γ-irradiated BiF3:BaF2 crystals were discussed.

     

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