Origin of the F-aggregate centers in BaFX(X = Cl, Br) single crystals

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作者：

Kanazawa Univ, Kanazawa, Japan ^{[1
]}

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来源：

Jpn J Appl Phys Part 2 Letter | / 7 A卷 / L812-L815期

关键词：

Band structure - Barium compounds - Color centers - Iridium - Photoluminescence - Refractive index - Single crystals;

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摘要：

Some new experimental evidence to determine the origin of the F-aggregate centers located in the near IR region in BaFX(X = Cl, Br) crystals is demonstrated. The attribution of the F-aggregate bands to a cluster of the F(X-) centers has been confirmed through a series of measurements on their emission in IR and the process of aggregates formation in BaFCl1-xBrx mixed system. The F-aggregate bands at 860 and 1100 nm are assigned to the F(X-)2 and F(X-)4 centers, respectively, in view of the equilibrium between the F(X-) centers and the F-aggregate centers.

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