Photoluminescence and structure evolution of laser synthesized ZrO2:Eu3+ nanopowders depending on the dopant concentration

Nashivochnikov, Aleksandr A.; Kostyukov, Anton I.; Рахманова, М. И.; Cherepanova, Svetlana V.; Снытников, В. Н.

doi:10.1016/j.ceramint.2022.10.018

Cited by 6 publications

(5 citation statements)

References 51 publications

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“…We determine a lifetime of 5.3 ± 0.1 ms. This is similar to the longest values reported, 45 indicating that the contribution of non-radiative decay, e.g. via interaction with surface or other defects, is limited.…”

supporting

confidence: 90%

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Epitaxial Core/Shell Nanocrystals of (Europium-Doped) zirconia and hafnia

Seno,

Reichholf,

Salutari

et al. 2024

Preprint

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A careful design of nanocrystal architecture can strongly enhance the nanocrystal function. So far, this strategy faced a synthetic bottleneck in the case of refractory oxides. Here, we demonstrate the epitaxial growth of hafnia shells onto zirconia cores, and pure zirconia shells onto europium doped zirconia cores. The core/shell structures are fully crystalline. Upon shelling, the optical properties of the europium dopant are dramatically improved (featuring a more uniform coordination and a longer photoluminescence lifetime), indicating the suppression of non-radiative pathways. These results launch the stable zirconium and hafnium oxide hosts as alternatives for the established NaYF4 systems.

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supporting

confidence: 90%

“…Higher doping percentages are typically associated with shorter lifetimes. 45 Here we report a core doped with 9% Eu, which features a lifetime of 5.3 ms after shelling and thus passivating of the surface defects. Some authors attribute the faster decay to monoclinic crystals phase and the slower decay to the tetragonal phase.…”

mentioning

confidence: 87%

Epitaxial Core/Shell Nanocrystals of (Europium-Doped) zirconia and hafnia

Seno,

Reichholf,

Salutari

et al. 2024

Preprint

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show abstract

“…We determined a lifetime of 5.3 ± 0.1 ms. This is similar to the longest values reported for Eu 3+ in ZrO 2 (nano)powders, 47 indicating that the contribution of nonradiative decay, e.g. via interaction with surface or other defects, is limited.…”

supporting

confidence: 87%

“…In the literature, long lifetimes of 4–5 ms appear only for low doping percentages (1%). Higher doping percentages are typically associated with shorter lifetimes . Here we report a core doped with 9% Eu that features a lifetime of 5.3 ms after shelling and thus passivation of the surface defects.…”

mentioning

confidence: 73%

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Epitaxial Core/Shell Nanocrystals of (Europium-Doped) Zirconia and Hafnia

Seno,

Reichholf,

Salutari

et al. 2024

J. Am. Chem. Soc.

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A careful design of the nanocrystal architecture can strongly enhance the nanocrystal function. So far, this strategy has faced a synthetic bottleneck in the case of refractory oxides. Here we demonstrate the epitaxial growth of hafnia shells onto zirconia cores and pure zirconia shells onto europium-doped zirconia cores. The core/shell structures are fully crystalline. Upon shelling, the optical properties of the europium dopant are dramatically improved (featuring a more uniform coordination and a longer photoluminescence lifetime), indicating the suppression of nonradiative pathways. These results launch the stable zirconium and hafnium oxide hosts as alternatives for the established NaYF 4 systems.

show abstract