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首页> 外文期刊>Materials Chemistry and Physics >Eu (Ⅲ) as a probe in titania thin films: The effect of temperature
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Eu (Ⅲ) as a probe in titania thin films: The effect of temperature

机译：Eu（Ⅲ）作为二氧化钛薄膜探针的研究：温度的影响

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摘要

Titania oxide films doped with europium were prepared by the sol-gel process and deposited on glass substrates by the dip-coating technique. The fluorescence and excitation spectra of the Eu (Ⅲ) in the films changed as the calcination temperature rose. TiO_2 :Eu thin films were heat-treated at various temperatures (100, 200, 300,400 and 500℃), resulting in transparent films. Excitation spectra presented a change in the charge transfer band (CTB) with increasing temperature. Eu (Ⅲ) emission spectra exhibited transitions arising mainly from the ~5D_0 level to the ~7F_J (J = 0-4) manifolds. The lifetime of the ~5D_0 → ~7F_2 transition of the Eu (Ⅲ) ion increased in the samples heated-treated up to 400℃, while the lifetime of the sample treated at 500℃ decreased, probably due to a change in the crystalline structure of the TiO_2.
机译：通过溶胶-凝胶法制备掺杂euro的二氧化钛膜，并通过浸涂技术将其沉积在玻璃基板上。随着煅烧温度的升高，薄膜中Eu（Ⅲ）的荧光和激发光谱发生了变化。在各种温度（100、200、300,400和500℃）下对TiO_2：Eu薄膜进行热处理，得到透明的薄膜。激发光谱表明，电荷转移带（CTB）随温度升高而变化。 Eu（Ⅲ）发射光谱的跃迁主要是由〜5D_0能级到〜7F_J（J = 0-4）流形引起的。 Eu（Ⅲ）离子〜5D_0→〜7F_2跃迁的寿命在加热至400℃的样品中增加，而在500℃处理的样品的寿命减少，这可能是由于晶体结构的改变的TiO_2。

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