Optical Properties of Divalent Thulium in Crystalline Strontium Tetraborate

J. R. Peterson; W. Xu; S. Dai1

doi:10.1021/cm00057a017

Optical Properties of Divalent Thulium in Crystalline Strontium Tetraborate

J. R. Peterson, W. Xu, S. Dai1

Chemical Sciences Division

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Abstract

Absorption and luminescence spectra from SrB₄0₇:Tm²⁺ prepared in air have been recorded at room temperature. Because thulium was introduced as Tm³⁺ from Tm₂O₃, a valence change from Tm³⁺ to Tm²⁺ was observed. Optimum production of Tm²⁺ ion occurs when the sample is heated in air at 650 °C. A broad emission band centered in the vicinity of 550 nm has been observed from the sample upon excitation at 457.9 nm. We suggest that it is due to Tm²⁺ ion emission from the 5d band into the ground-state 4f level (²F_7/2 Several conditions promoting the reduction of Tm³⁺ ion in the sample are discussed. In addition, to aid the reduction of Tm³⁺ ion, we have also prepared SrB₄0₇:Tm²⁺ in Ar/H₂ (4%) atmosphere and compared the optical characteristics of Tm²⁺ ion in these samples with those prepared in air.

Original language	English
Pages (from-to)	1686-1689
Number of pages	4
Journal	Chemistry of Materials
Volume	7
Issue number	9
DOIs	https://doi.org/10.1021/cm00057a017
State	Published - Sep 1995

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title = "Optical Properties of Divalent Thulium in Crystalline Strontium Tetraborate",

abstract = "Absorption and luminescence spectra from SrB407:Tm2+ prepared in air have been recorded at room temperature. Because thulium was introduced as Tm3+ from Tm2O3, a valence change from Tm3+ to Tm2+ was observed. Optimum production of Tm2+ ion occurs when the sample is heated in air at 650 °C. A broad emission band centered in the vicinity of 550 nm has been observed from the sample upon excitation at 457.9 nm. We suggest that it is due to Tm2+ ion emission from the 5d band into the ground-state 4f level (2F7/2 Several conditions promoting the reduction of Tm3+ ion in the sample are discussed. In addition, to aid the reduction of Tm3+ ion, we have also prepared SrB407:Tm2+ in Ar/H2 (4%) atmosphere and compared the optical characteristics of Tm2+ ion in these samples with those prepared in air.",

author = "Peterson, {J. R.} and W. Xu and S. Dai1",

year = "1995",

month = sep,

doi = "10.1021/cm00057a017",

language = "English",

volume = "7",

pages = "1686--1689",

journal = "Chemistry of Materials",

issn = "0897-4756",

publisher = "American Chemical Society",

number = "9",

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TY - JOUR

T1 - Optical Properties of Divalent Thulium in Crystalline Strontium Tetraborate

AU - Peterson, J. R.

AU - Xu, W.

AU - Dai1, S.

PY - 1995/9

Y1 - 1995/9

N2 - Absorption and luminescence spectra from SrB407:Tm2+ prepared in air have been recorded at room temperature. Because thulium was introduced as Tm3+ from Tm2O3, a valence change from Tm3+ to Tm2+ was observed. Optimum production of Tm2+ ion occurs when the sample is heated in air at 650 °C. A broad emission band centered in the vicinity of 550 nm has been observed from the sample upon excitation at 457.9 nm. We suggest that it is due to Tm2+ ion emission from the 5d band into the ground-state 4f level (2F7/2 Several conditions promoting the reduction of Tm3+ ion in the sample are discussed. In addition, to aid the reduction of Tm3+ ion, we have also prepared SrB407:Tm2+ in Ar/H2 (4%) atmosphere and compared the optical characteristics of Tm2+ ion in these samples with those prepared in air.

AB - Absorption and luminescence spectra from SrB407:Tm2+ prepared in air have been recorded at room temperature. Because thulium was introduced as Tm3+ from Tm2O3, a valence change from Tm3+ to Tm2+ was observed. Optimum production of Tm2+ ion occurs when the sample is heated in air at 650 °C. A broad emission band centered in the vicinity of 550 nm has been observed from the sample upon excitation at 457.9 nm. We suggest that it is due to Tm2+ ion emission from the 5d band into the ground-state 4f level (2F7/2 Several conditions promoting the reduction of Tm3+ ion in the sample are discussed. In addition, to aid the reduction of Tm3+ ion, we have also prepared SrB407:Tm2+ in Ar/H2 (4%) atmosphere and compared the optical characteristics of Tm2+ ion in these samples with those prepared in air.

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JO - Chemistry of Materials

JF - Chemistry of Materials

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Optical Properties of Divalent Thulium in Crystalline Strontium Tetraborate

Abstract

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