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首页> 外文期刊>Optics Letters >Yb~(3+)-doped GeS_2-Ga_2S_3-CsCl glass with broad and adjustable absorption/excitation band for near-infrared luminescence
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Yb~(3+)-doped GeS_2-Ga_2S_3-CsCl glass with broad and adjustable absorption/excitation band for near-infrared luminescence

机译：掺Yb〜（3+）的GeS_2-Ga_2S_3-CsCl玻璃，具有宽可调的吸收/激发带，可用于近红外发光

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摘要

The luminescent property of Yb~(3+) ions in GeS_2-Ga_2S_3-CsCl glasses with different CsCl contents has been studied. All the samples demonstrate a broad excitation band in the UV or/and visible range, depending on the composition, which is attributed to the charge transfer of the Yb~(3+)-S~(2-)/Cl~- couple. The width of the excitation/absorption band can be as large as 150 nm. Moreover, with the increase of CsCl content, the peak position of the band can be continuously adjusted from 458 to 380 nm, due to the increase of the local average electronegativity around Yb~(3+) ions. The broad and adjustable excitation band makes the Yb~(3+)-doped GeS_2-Ga_2S_3-CsCl glass interesting for modifying the solar spectrum by absorbing strongly in the UV/blue region for emission around 1 μm. This kind of material is the key to adapting the solar spectrum to the response of silicon photovoltaic solar cells.
机译：研究了不同CsCl含量的GeS_2-Ga_2S_3-CsCl玻璃中Yb〜（3+）离子的发光性质。所有样品在紫外或/和可见光范围内均显示出宽的激发带，这取决于组成，这归因于Yb〜（3 +）-S〜（2-）/ Cl〜-对的电荷转移。激发/吸收带的宽度可高达150 nm。此外，随着CsCl含量的增加，由于Yb〜（3+）离子周围的局部平均电负性的增加，能带的峰位置可以从458 nm连续调节到380 nm。宽且可调的激发带使掺Yb〜（3+）的GeS_2-Ga_2S_3-CsCl玻璃对于通过强烈吸收UV /蓝光区域中约1μm的发射光来改变太阳光谱很感兴趣。这种材料是使太阳光谱适应硅光伏太阳能电池响应的关键。

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