LaGaO3/SrTiO3混合晶体中Ti3+离子的蓝色荧光

Feofilov Symposium on Spectropscopy of Crystals Activated by Rare-Earth and Transition Metal Ions Pub Date : 2002-07-12 DOI:10.1117/12.475317

S. Kaczmarek

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引用次数: 0

摘要

在强晶体场的吸收光谱中，在八面体Ga位置存在Ti3+离子。Ti3+离子的产生是由于晶体生长的一些还原条件。发现在较高温度下电子离域，例如在氧化还原反应中:Ti4+ + e = Ti3+可能在光谱中以近红外区电荷转移带的形式出现，引起蓝色吸收。LaGaO3/SrTiO3混合晶体中Ti3+的2T2-2E跃迁荧光显示，在314、340和384 nm激发下，Ti3+的2T2-2E跃迁有两个以420和447 nm为中心的荧光带。

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Blue fluorescence of Ti3+ ions in LaGaO3/SrTiO3 mixed crystals

In the absorption spectrum of the crystal there was stated the presence of Ti3+ ions at octahedral Ga positions in strong crystal field. Ti3+ ions arise due to some reducing conditions of the crystal growth. It was found that electron delocalization at higher temperature, e.g. In oxidation-reduction reaction: Ti4+ + e equals Ti3+ may appear in optical spectra as charge transfer bands in the NIR region giving rise to blue absorption. The observed fluorescence of 2T2-2E transition of Ti3+ in the LaGaO3/SrTiO3 mixed crystals shows two bands centered at about 420 and 447 nm coming from excitation at 314, 340 and 384 nm.

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Feofilov Symposium on Spectropscopy of Crystals Activated by Rare-Earth and Transition Metal Ions

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