Sr6(BO3)3BN2: An Oxido–Nitrido–Borate Phosphor Featuring BN2 Dumbbells

Jantz, Stephan G.; Erdmann, Rebekka; Hariyani, Shruti; Brgoch, Jakoah; Höppe, Henning A.

doi:10.1021/acs.chemmater.0c02925

Cited by 7 publications

(7 citation statements)

References 59 publications

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“…Such a long-distance reduces the probability of energy transfer between the Pr 3+ centers effectively and leads to the unusually long 1 D 2 lifetime of the Pr 3+ ions in phase III. Besides, combined with the 1 D 2 lifetimes of Pr 3+ and the site symmetry of doping sites in the three K 3 Lu(PO 4 ) 2 phases, it is worth noting that the centrosymmetric site would reduce the transition probability of the 1 D 2 → 3 H 4 transition and improve the related 1 D 2 lifetime, which is in agreement with the consequence in other lanthanide-based phosphors. , …”

Section: Resultssupporting

confidence: 76%

Enhancing the Photoluminescence Property of Pr³⁺ Ions by Understanding the Polymorphous Influence of the K₃Lu(PO₄)₂ Host

Han

et al. 2021

Inorg. Chem.

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Adjusting the local coordination environment of lanthanide luminescent ions is a useful method to manipulate the relevant photoluminescence (PL) property. K3Lu(PO4)2 is a phase-change material, and according to the stable temperature range from low to high, the related polymorphs are phase I [P21/m, coordination number (CN) of Lu3+ = 7], phase II (P21/m, CN = 6), and phase III (P3̅, CN = 6), respectively. Based on the temperature-dependent PL analysis of K3Lu(PO4)2:Pr3+, we find that Pr3+ ions occupy the noninversion sites (C s ) in the two low-temperature phases but preferentially enter into the inversion ones (C 3i ) in phase III. Compared to Pr3+-doped phase I (78 K), Pr3+ ions in phase III (300 K) manifest a weaker fluorescence intensity (170-fold lower). To enhance the room-temperature PL property of K3Lu(PO4)2:Pr3+, a polymorphous adjustment strategy was proposed by the use of the ion-doping method. By introducing the Gd3+ ions into the lattice, Pr3+-doped phase I is successfully stabilized to room temperature, manifesting a 27-fold fluorescence increase in comparison to K3Lu(PO4)2:Pr3+ (0.1 at. %). The finding discussed in this study highlights the significance of site engineering for luminescent ions and also presents the application value of phase-change hosts in the development of high-performance luminescent materials.

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Section: Resultssupporting

confidence: 76%

Enhancing the Photoluminescence Property of Pr³⁺ Ions by Understanding the Polymorphous Influence of the K₃Lu(PO₄)₂ Host

Han

et al. 2021

Inorg. Chem.

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“…In contrast, the defect formation energies for the structures containing the

{V'_{\rm{K}}}

(Equation 3) are generally less than 10 meV/defect and fall within a range of less than 6 meV per atom (Table S4, Supporting Information). [ 40 ] Based on these calculations, Eu 2+ substitution results in the formation of K + vacancies, and there is no energetic preference for Eu 2+ to preferentially substitute on a particular K + site.…”

Section: Resultsmentioning

confidence: 99%

Realizing Wide‐Gamut Human‐Centric Display Lighting with K₃AlP₃O₉N:Eu²⁺

Hariyani

Xing

Amachraa

et al. 2023

Advanced Optical Materials

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Computers, televisions, and smartphones are revolutionized by the invention of InGaN blue light‐emitting diode (LED) backlighting. Yet, continual exposure to the intense blue LED emission from these modern displays can cause insomnia and mood disorders. Developing “human‐centric” backlighting that uses a violet‐emitting LED chip and a trichromatic phosphor mixture to generate color images is one approach that addresses this problem. The challenge is finding a blue‐emitting phosphor that possesses a sufficiently small Stokes’ shift to efficiently down‐convert violet LED light and produce a narrow blue emission. This work reports a new oxynitride phosphor that meets this demand. K3AlP3O9N:Eu2+ exhibits an unexpectedly narrow (45 nm, 2206 cm−1), thermally robust, and efficient blue photoluminescence upon violet excitation. Computational modeling and temperature‐dependent optical property measurements reveal that the narrow emission arises from a rare combination of preferential excitation and site‐selective quenching. The resulting chromaticity coordinates of K3AlP3O9N:Eu2+ lie closer to the vertex of the Rec. 2020 than a blue LED chip and provides access to ≈10% more colors than a commercial tablet when combined with commercial red‐ and green‐emitting phosphors. Alongside the wide gamut, tuning the emission from the violet LED and phosphor blend can reduce blue light emissions to produce next‐generation, human‐centric displays.

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“…Whereas controlling the cation chemistry has been a tool to tune materials for many years, tailoring of the anion chemistry has recently become more and more important [1–5] . Materials with desired physical and chemical properties can be obtained by taking advantage of the different anion radii, electronegativities or polarizabilities.…”

Section: Figurementioning

confidence: 99%

Na₃SO₄H—The First Representative of the Material Class of Sulfate Hydrides

et al. 2021

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The first representative of a novel class of mixed‐anionic compounds, the sulfate hydride Na3SO4H, and the corresponding deuteride Na3SO4D were obtained from the solid‐state reaction of NaH or NaD with dry Na2SO4. Precise reaction control is required, because too harsh conditions lead to the reduction of sulfate to sulfide. A combined X‐ray and neutron diffraction study revealed that the compound crystallizes in the tetragonal space group P4/nmm with the lattice parameters a=7.0034(2) Å and c=4.8569(2) Å. The sole presence of hydride and absence of hydroxide ions is proven by vibrational spectroscopy and comparison with spectra predicted from quantum chemical calculations. 1H and 23Na MAS NMR spectra are consistent with the structure of Na3SO4H: a single 1H peak at 2.9 ppm is observed, while two peaks at 15.0 and 6.2 ppm for the inequivalent 23Na sites are observed. Elemental analysis and quantum chemical calculations further support these results.

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Sr₆(BO₃)₃BN₂: An Oxido–Nitrido–Borate Phosphor Featuring BN₂ Dumbbells

Cited by 7 publications

References 59 publications

Enhancing the Photoluminescence Property of Pr³⁺ Ions by Understanding the Polymorphous Influence of the K₃Lu(PO₄)₂ Host

Enhancing the Photoluminescence Property of Pr³⁺ Ions by Understanding the Polymorphous Influence of the K₃Lu(PO₄)₂ Host

Realizing Wide‐Gamut Human‐Centric Display Lighting with K₃AlP₃O₉N:Eu²⁺

Na₃SO₄H—The First Representative of the Material Class of Sulfate Hydrides

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Sr6(BO3)3BN2: An Oxido–Nitrido–Borate Phosphor Featuring BN2 Dumbbells

Cited by 7 publications

References 59 publications

Enhancing the Photoluminescence Property of Pr3+ Ions by Understanding the Polymorphous Influence of the K3Lu(PO4)2 Host

Enhancing the Photoluminescence Property of Pr3+ Ions by Understanding the Polymorphous Influence of the K3Lu(PO4)2 Host

Realizing Wide‐Gamut Human‐Centric Display Lighting with K3AlP3O9N:Eu2+

Na3SO4H—The First Representative of the Material Class of Sulfate Hydrides

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Product

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Sr₆(BO₃)₃BN₂: An Oxido–Nitrido–Borate Phosphor Featuring BN₂ Dumbbells

Enhancing the Photoluminescence Property of Pr³⁺ Ions by Understanding the Polymorphous Influence of the K₃Lu(PO₄)₂ Host

Enhancing the Photoluminescence Property of Pr³⁺ Ions by Understanding the Polymorphous Influence of the K₃Lu(PO₄)₂ Host

Realizing Wide‐Gamut Human‐Centric Display Lighting with K₃AlP₃O₉N:Eu²⁺

Na₃SO₄H—The First Representative of the Material Class of Sulfate Hydrides