A New Crystal Phase Molybdate Yb2Mo4O15: The Synthesis and Upconversion Properties

Wang, Haiqiao; Mačković, Mirza; Osvet, Andres; Litzov, Ivan; Epelbaum, E.; Stiegelschmitt, Alfons; Batentschuk, Miroslaw; Spiecker, Erdmann; Brabec, Christoph J.

doi:10.1002/ppsc.201400137

Cited by 12 publications

(3 citation statements)

References 36 publications

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“… eUCQY [ 192 ] Mo 4 O 15 :Yb 1.82 Er 0.18 NC thin film 1-20 nm (*Varied) - *>0.1 975 (*Gauss) ~0.5 ~1.3 (500–575) 2.6 A, B, C?,D?, H?, I, J C? iUCQY [ 193 ] NaGdF 4 : (18%)Yb 3+ ,(2%)Er 3+ @NaYF 4 CD in Toluene 5.5 [16] nm (Hexagonal) - *>0.1 980 (*Gauss) 100 ~0.22 (500-700) Extrapolated data 2.2 x10 −3 A, H, I, J H *eUCQY [ 135 ] SrLuF: (30.6%)Yb 3+ ,(2.9%)Er 3+ @SrLuF CD in Toluene 4.9 (L: ~11] nm (Face-centred cubic) - *>0.1 980 (*Gauss) 100 ~0.66 (500-700) Extrapolated data 6.6 x10 −3 A, H, I, J H *eUCQY [ 135 ] SrLuF: (30.6%)Yb 3+ ,(2.9%)Er 3+ @SrLuF CD in Toluene 4.9 (~16] nm (Face-centred cubic) - *>0.1 980 (*Gauss) 100 ~1 (500-700) Extrapolated data …”

Section: Reviewing the Ucqy Reporting And Measurement Techniques In The Literaturementioning

confidence: 99%

The upconversion quantum yield (UCQY): a review to standardize the measurement methodology, improve comparability, and define efficiency standards

Jones

Gakamsky

Marqués-Hueso

2021

Science and Technology of Advanced Materials

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Advancing the upconversion materials field relies on accurate and contrastable photoluminescence efficiency measurements, which are characterised by the absolute upconversion quantum yield (UCQY). However, the methodology for such measurements cannot be extrapolated directly from traditional photoluminescence quantum yield techniques, primarily due to issues that arise from the non-linear behaviour of the UC process. Subsequently, no UCQY standards exist, and significant variations in their reported magnitude can occur between laboratories. In this work, our aim is to provide a path for determining and reporting the most reliable UCQYs possible, by addressing all the effects and uncertainties that influence its value. Here the UCQY standard, at a given excitation power density, is defined under a range of stated experimental conditions, environmental conditions, material properties, and influential effects that have been estimated or corrected for. A broad range of UCQYs reported for various UC materials are scrutinized and categorized based on our assertion of the provided information associated with each value. This is crucial for improved comparability with other types of photoluminescent materials, and in addition, the next generation of UC materials can be built on top of these reliable standards.

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Section: Reviewing the Ucqy Reporting And Measurement Techniques In The Literaturementioning

confidence: 99%

The upconversion quantum yield (UCQY): a review to standardize the measurement methodology, improve comparability, and define efficiency standards

Jones

Gakamsky

Marqués-Hueso

2021

Science and Technology of Advanced Materials

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“…Furthermore, the rare earth doped molybdates and tungstates also attract much attention for application in areas such as lasers9, scintillators10, upconverters11, and bio-imaging12 to mention just a few. This shows the versatility of molybdate and tungstate based compounds.…”

mentioning

confidence: 99%

“…This shows the versatility of molybdate and tungstate based compounds. Thus the research of these compounds is very intensive and new structures are reported every so often1113.…”

mentioning

confidence: 99%

Luminescence and luminescence quenching of highly efficient Y2Mo4O15:Eu3+ phosphors and ceramics

Janulevicius

Marmokas

Misevicius

et al. 2016

Sci Rep

134

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A good LED phosphor must possess strong enough absorption, high quantum yields, colour purity, and quenching temperatures. Our synthesized Y2Mo4O15:Eu3+ phosphors possess all of these properties. Excitation of these materials with near-UV or blue radiation yields bright red emission and the colour coordinates are relatively stable upon temperature increase. Furthermore, samples doped with 50% Eu3+ showed quantum yields up to 85%, what is suitable for commercial application. Temperature dependent emission spectra revealed that heavily Eu3+ doped phosphors possess stable emission up to 400 K and lose half of the efficiency only at 515 K. In addition, ceramic disks of Y2Mo4O15:75%Eu3+ phosphor with thickness of 0.71 and 0.98 mm were prepared and it turned out that they efficiently convert radiation of 375 and 400 nm LEDs to the red light, whereas combination with 455 nm LED yields purple colour.

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Decoding Upconversion‐Emitting Phase in Complex Composites Through Single‐Particle‐Level Upconversion Imaging and Density Functional Theory Calculations

Kshetri,

Chaudhary,

Kim

et al. 2024

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The crystal structure and phase stability of a host lattice plays an important role in efficient upconversion phenomena. In stable hosts, lanthanides doping should not generally change the crystal structure of the host itself. But when phase of a system drastically changes after lanthanide doping resulting in multiple phases, accurate identification of upconverting phase remains a challenge. Herein, an attempt to synthesize lanthanide‐doped NiMoO4 by microwave hydrothermal method produced MoO3/Yb2Mo4O15/NiMoO4 micro‐nano composite upconversion phosphor. A combined approach of density functional theory (DFT) calculations and single‐particle‐level upconversion imaging has been employed to elucidate the phase stability of different phases and upconversion properties within the composite. Through single‐particle‐level imaging under 980 nm excitation, an unprecedented resolution in visualizing individual emitting and non‐emitting regions within the composite has been achieved, thereby allowing to accurately assign the Yb2Mo4O15 as a sole upconversion emitting phase in the composite. Result of the DFT calculation further shows that the Yb2Mo4O15 phase is the most thermodynamically preferred over other lanthanide‐doped phases in the composite. This comprehensive understanding not only advances the knowledge of upconversion emission from composite materials but also holds promise for tailoring optical properties of materials for various applications, including bioimaging, sensing, and photonics, where controlled light emission is crucial.

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A New Crystal Phase Molybdate Yb₂Mo₄O₁₅: The Synthesis and Upconversion Properties

Cited by 12 publications

References 36 publications

The upconversion quantum yield (UCQY): a review to standardize the measurement methodology, improve comparability, and define efficiency standards

The upconversion quantum yield (UCQY): a review to standardize the measurement methodology, improve comparability, and define efficiency standards

Luminescence and luminescence quenching of highly efficient Y2Mo4O15:Eu3+ phosphors and ceramics

Decoding Upconversion‐Emitting Phase in Complex Composites Through Single‐Particle‐Level Upconversion Imaging and Density Functional Theory Calculations

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