A Novel Blue‐Emitting Phosphor of Eu2+‐Activated Magnesium Haloborate Mg3B7O13Cl

Qiao, Xuebin; Seo, Hyo Jin

doi:10.1111/jace.13329

Cited by 8 publications

(2 citation statements)

References 41 publications

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“…A rare earth ion-doped borate luminescent material can emit a broad band, and the luminescence properties can be controlled by changing the type of alkaline earth metal and the concentration of rare earth ions. Among a wide variety of matrix compounds, halogen-containing borate has become a research hotspot in the exploration of new luminescent materials. − Especially, Eu 2+ -doped halogenate borates, such as X 2 B 5 O 9 Y (X = Ba, Sr, Ca; Y = Cl, Br) series, including Sr 2 B 5 O 9 Cl, Ca 2 B 5 O 9 Cl, Eu 2 B 5 O 9 Cl, Ca 2 BO 3 Cl, Sr 5 (BO 3 ) 3 Cl, Ba 2 Y(BO 3 ) 2 Cl, Mg 3 B 7 O 13 Cl, Sr 5 (PO 4 ) 3 Cl:Eu, etc. − As a matrix, halogenate borates have many advantages, including low synthesis temperature, good physicochemical stability, excellent thermal stability, hydrolytic stability, and so on. , …”

Section: Introductionmentioning

confidence: 99%

Abnormal Self-Reduction Phenomenon of Europium-Doped Borate and Its Luminescence Properties

Ding

et al. 2021

ACS Appl. Electron. Mater.

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In this work, mixed-valence Eu-doped Ba 2 AlB 4 O 9 Cl (BABOC) was successfully synthesized in an air atmosphere for the first time. The samples were determined to possess a good single phase by Rietveld structure refinement and X-ray powder diffraction (XRD). The luminescence spectra of the samples showed that the characteristic emission and excitation peaks of Eu 2+ and Eu 3+ were both present in the sample, and their emitting color could be adjusted by changing the Eu doping concentration. The band gap of BABOC, calculated by density functional theory (DFT), was found to be 4.70 eV and was confirmed by diffuse reflection spectroscopy (DRS). The relationship between the selfreduction efficiency of the sample and the doping concentration of Eu ions was studied by measuring the decay lifetimes of Eu 2+ and Eu 3+ . The thermal quenching and thermoluminescence spectroscopy of the samples were also studied in detail. All of the results indicated that BABOC:Eu has special self-reduction properties, and the abnormal self-reduction phenomenon was explained by a charge compensation model. Our investigation of BABOC:Eu provides practical evidence and a theoretical basis for the self-reduction phenomenon and a new method to further modify the luminescence properties of phosphors.

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Section: Introductionmentioning

confidence: 99%

Abnormal Self-Reduction Phenomenon of Europium-Doped Borate and Its Luminescence Properties

Ding

et al. 2021

ACS Appl. Electron. Mater.

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“…The library under investigation in this work spans a composition space complimentary to what has been found in the literature cited above. The onset of loss of external quantum efficiency (EQE) is commonly reported at Eu concentrations between 3 at.% and 10 at.% in powdered phosphors [22,23,24,25]. This EQE loss is caused by concentration quenching outweighing absorption.…”

Section: Fabrication Of the Librarymentioning

confidence: 99%

Functionalizing window coatings with luminescence centers by combinatorial sputtering of scatter-free amorphous SiAlON:Eu2+ thin film composition libraries

Merkx

Overbeek²,

Kolk

2019

Journal of Luminescence

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SiAlON window coatings are applied on an industrial scale to achieve e.g. scratch-resistance and anti-reflection. Doping these SiAlONs with rare-earths adds luminescent functionality, which could be applied in photovoltaics. By using a combinatorial reactive sputtering approach, an amorphous thin film composition library with a Si:Al ratio from 0.062 : 1 to 3.375 : 1 and a Eu doping from 4.8 at.% to 26 at.% is created. This library uniquely combines high absorption, strong emission and absence of light scattering. By combining position-dependent EDX measurements with transmission and emission spectra, properties like the index of refraction, absorption strength, emission wavelength and decay times of the library can directly be related to the composition. Throughout the library, an index of refraction of 1.63 ± 0.03 is observed, typical for a film with low nitrogen content. The library also shows a large absorption coefficient of 1294 ± 8 cm −1 at.% −1 . Laser-excited emission spectra show that the library has a strong redshift from 500 nm to 550 nm with increasing Al concentration. An increase in Eu concentration also causes a shift of the emission to red. Decay spectra show that a high degree of Si greatly improves the luminescence intensity. These functionalized SiAlON coatings can be of great interest for transparent and scatter-free luminescent solar concentrators applied as windows.

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A novel UV-emitting Ce3+-doped chloroborate Ba2GaB4O9Cl phosphor

Liu

Zhang

et al. 2019

Optik

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A Novel Blue‐Emitting Phosphor of Eu²⁺‐Activated Magnesium Haloborate Mg₃B₇O₁₃Cl

Cited by 8 publications

References 41 publications

Abnormal Self-Reduction Phenomenon of Europium-Doped Borate and Its Luminescence Properties

Abnormal Self-Reduction Phenomenon of Europium-Doped Borate and Its Luminescence Properties

Functionalizing window coatings with luminescence centers by combinatorial sputtering of scatter-free amorphous SiAlON:Eu2+ thin film composition libraries

A novel UV-emitting Ce3+-doped chloroborate Ba2GaB4O9Cl phosphor

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