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Ionothermal Synthesis of Lanthanide Tetrafluoride Nanoparticles Using Deep Eutectic Solvents

  • Benjamin R. Furman (a1), Robert D. Gutierrez (a1) and Charles K. Baker (a1)

Abstract

We have developed a new method for controlling the size, crystallinity, and polydispersity of 100–2000 nm tetrafluoride phosphor particles. Five polyol-based deep eutectic solvents (DESs) were downselected out of a set of more than 130 candidates. We analyzed their benefits in synthesizing phosphor matrix particles of β-NaYF4, β-NaYbF4, and β-NaGdF4. We produced green (λmax = 540 nm) and blue/UV (λmax = 450 nm) upconverting phosphors in DES using Yb,Er and Yb,Tm codopants, respectively. The blue/UV phosphor reaction was scaled the up to 25 L, yielding nearly 400 g of high-quality, bright photoluminescent, β-phase product under mild conditions. We conclude that polyol-based DES systems offer a uniquely specialized and useful toolkit for phosphor synthesis.

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References

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Keywords

Ionothermal Synthesis of Lanthanide Tetrafluoride Nanoparticles Using Deep Eutectic Solvents

  • Benjamin R. Furman (a1), Robert D. Gutierrez (a1) and Charles K. Baker (a1)

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