What question did this study set out to answer?

Investigate the luminescence properties of divalent europium-doped alkaline-earth borates and clarify the relationship between host oxygen coordination environments and optical transition energies.

October 1, 1997Chemistry of Materials

Eu2+ Luminescence in the Borates X2Z(BO3)2 (X = Ba, Sr; Z = Mg, Ca)

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Authors

ADAnthony L. DiazCentral Washington University DKDouglas A. KeszlerNorthwestern University

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Implication

Spectroscopic study demonstrates tunable luminescence in europium-doped borates, indicating that oxygen coordination geometry and covalency govern optical transition energies.

Key Points

Investigate the luminescence properties of divalent europium-doped alkaline-earth borates and clarify the relationship between host oxygen coordination environments and optical transition energies.
Measured luminescence emission and excitation properties of Eu2+-doped Ba2Mg(BO3)2, Ba2Ca(BO3)2, and Sr2Mg(BO3)2.
Correlated the 4f7 to 4f6 5d1 electronic transition energies of Eu2+ across an extensive series of borate hosts against local oxygen coordination environments.
Eu2+-doped Ba2Mg(BO3)2, Ba2Ca(BO3)2, and Sr2Mg(BO3)2 yielded red, green, and yellow light emissions, respectively.
The 4f7 to 4f6 5d1 transition shifted toward lower energies in borates containing oxygen atoms highly coordinated by regular arrangements of barium or strontium cations.
Covalency effects were identified as the primary mechanism responsible for shifting the excitation band to lower energies.

Cite This Study

Diaz et al. (1997) studied this question.

synapsesocial.com/papers/6aa92e8507f6ffa79a0c080c https://doi.org/10.1021/cm9700817

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Implication

Spectroscopic study demonstrates tunable luminescence in europium-doped borates, indicating that oxygen coordination geometry and covalency govern optical transition energies.

Eu2+ Luminescence in the Borates X2Z(BO3)2 (X = Ba, Sr; Z = Mg, Ca)

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Implication

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Cite This Study

Eu2+ Luminescence in the Borates X2Z(BO3)2 (X = Ba, Sr; Z = Mg, Ca)

Discussion

Member takes

Implication

Key Points

Cite This Study

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