Influence of substitution of Al-O for Si-N on improvement of photoluminescence properties and thermal stability of Ba2Si5N8:Eu2+ red emitting phosphors

Khan, Sayed Ali; Khan, Noor Zamin; Zhong, Hao; Ji, Wei; Abadikhah, Hamidreza; Lu, Hao; Xu, Xin; Agathopoulos, Simeon

doi:10.1016/j.jallcom.2017.09.335

Cited by 45 publications

(14 citation statements)

References 28 publications

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“…Recently, aluminum nitride (AlN), boron nitride (BN), and gallium nitride (GaN) have been studied extensively because of their wide band gaps, high efficiency, and excellent chemical stability. − In particular, these materials doped with rare-earth (RE) ions have excellent luminescence properties suitable for solid-state lighting due to their wide band gaps; hence, they have attracted great interest in recent years. The continued fascination with RE-doped wide-band gap materials is partly due to the discovery that thermal quenching of the emission decreases as the band gap of the host material increases. − Because the doping activator ions of metal nitrides or oxynitrides have good visible light emission and low luminescence heat quenching, they are often used as color conversion phosphors for white light-emitting diodes (wLEDs) …”

Section: Introductionmentioning

confidence: 99%

Boron Nitride Nanoparticle Phosphors for Use in Transparent Films for Deep-UV Detection and White Light-Emitting Diodes

Jung

Shim

Son

et al. 2021

ACS Appl. Nano Mater.

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White-emitting hexagonal boron nitride (h-BN) nanophosphors were synthesized via pyrolysis (1200 °C). The nanoparticle phosphors were prepared by chemical mixed molecular adduction in which the starting materials were boric acid, melamine, cerium nitrate (Ce 3+ ), and dysprosium nitrate (Dy 3+ ). The nanoparticle phosphors showed blue-yellow emission activated by attendant incorporation of Ce 3+ and Dy 3+ when excited under ultraviolet (UV) light. This color emission was modified from blue to yellow by adjusting the atomic ratio of rare earth elements ([Dy + ]/[Ce 3+ ]) without interruption of the crystal structure of h-BN. Photoluminescent (PL) intense yellow emission was realized in BN:Ce 3+ /Dy 3+ phosphors at [Dy + ]/[Ce 3+ ] = 0.5, and the characteristic Ce 3+ emission peaks of 4f−5d at 480 nm and Dy 3+ due to the transitions of 4 F 9/2 → 6 H 15/2 at 480 nm, 4 F 9/2 → 6 H 13/2 at 575 nm, and 4 F 9/2 → 6 H 11/2 at 662 nm were observed in the PL emission spectra. However, further addition of Dy 3+ ions exchanged the phase in h-BN to dysprosium borate (DyBO 3 ), according to X-ray diffraction results, and decreased luminescence properties, according to PL findings. In addition, the synthesized nanophosphors showed white emission under UV light for thin films that would be suitable for deep-UV detection and anticounterfeiting applications, which require the film to be hidden and identifiable only by macroscopic examination. In addition, the co-doped nanophosphors can be applied to white-emitting LED glass discs.

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Section: Introductionmentioning

confidence: 99%

Boron Nitride Nanoparticle Phosphors for Use in Transparent Films for Deep-UV Detection and White Light-Emitting Diodes

Jung

Shim

Son

et al. 2021

ACS Appl. Nano Mater.

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“…The main benefit of this mechanism is a simple coating which led a low‐cost product. However, the emission spectrum of this combination suffers from the deficiency of the red color component which doesn't provide the desire quality color of white‐LED 10,11 . More specifically the generated white light with the mention combination provides poor color quality due to high correlated color temperature (CCT >7000 K) and lower color rendering index (CRI <80) 12,13 .…”

Section: Introductionmentioning

confidence: 99%

“…It is worth noting that the red‐emitting phosphors are the main desire for both the way of phosphors converted white – LEDs 11,17,18 . In the first method it is used to improve the value of CRI and CCT by enhancing the red spectral region in the emission spectrum of YAG: Ce 3+ coated on blue‐emitting InGaN chip 19‐21 .…”

Section: Introductionmentioning

confidence: 99%

Single phase multi color emitting Ca₂LuTaO₆: Dy³⁺/Eu³⁺ double perovskite oxide phosphors

Khan

Sohail

et al. 2021

J Am Ceram Soc

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The trivalent rare‐earth (RE3+) doped phosphors show tremendous achievement in narrow band multicolor line emission for various applications. However, the 4f–4f absorption transition of these ions is forbidden in UV and blue light excitation. Usually, a sensitizer having spin allowed transition was used as a co‐dopant to excite these ions via the energy transfer phenomenon. Another approach promisingly using to excite these ions by efficient energy transfer from the intrinsic emission of the Ca2LuTaO6 double perovskite phosphors host lattice. Phosphors of Ca2LuTaO6 with double perovskite structure were synthesized by using a high‐temperature solid‐state reaction method. The produced Ca2LuTaO6 double perovskite phosphors show an intrinsic broad band emission centered at 424 nm under the excitation of 313 nm UV light. The origin of this broad band blue emission was deeply investigated by using computation and experimental approaches. The trivalent activator Dy3+ and Eu3+ were doped is a single and co‐dopant in the produced Ca2LuTaO6 phosphors to check their excitation in UV and near‐UV spectral region. X‐ray diffraction and scanning electron microscopy were used to investigate the structure and phase analysis. Various characterizations such as photoluminescence excitation, emission, and CIE chromaticity coordinates were measured which illustrate the potential of Dy3+ and Eu3+ activated Ca2LuTaO6 double perovskite phosphors for narrow band multicolor line emission for various applications.

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“…One of the ways of overcoming the problem consists in adjusting the crystal field environment around Eu 2+ activator, the 5d levels of which are sensitive to crystal field in a single-host phosphor [8][9][10]. Nevertheless, up to now, the results obtained in this way allowed just quite little shift and broadening of Eu 2+ 5d-4f emission band.…”

Section: Introductionmentioning

confidence: 99%

Tuning Emission Spectrum of KSrPO4:Eu2+ Phosphor by Co-Doping with Y3+

et al. 2021

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A series of co-doped KSrPO 4 :Eu 2+ , Y 3+ phosphors have been prepared through a high-temperature solid-state reaction at various temperatures. Luminescence spectroscopic characterization allowed to demonstrate that emission spectrum of original KSrPO 4 :Eu 2+ phosphor that is typically dominated by Eu 2+ 4f 6 5d 1 → 4f 7 emission can be significantly modified by co-doping with Y 3+ ions, which results in appearance of a broad defect emission. The latter makes the phosphor potential for WLED application. The Y 3+ co-doping related defect emission was found to get enhanced with the increase of Y 3+ content and synthesis temperature. The nature and peculiarities of the new defect emission are discussed.

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Influence of substitution of Al-O for Si-N on improvement of photoluminescence properties and thermal stability of Ba2Si5N8:Eu2+ red emitting phosphors

Cited by 45 publications

References 28 publications

Boron Nitride Nanoparticle Phosphors for Use in Transparent Films for Deep-UV Detection and White Light-Emitting Diodes

Boron Nitride Nanoparticle Phosphors for Use in Transparent Films for Deep-UV Detection and White Light-Emitting Diodes

Single phase multi color emitting Ca₂LuTaO₆: Dy³⁺/Eu³⁺ double perovskite oxide phosphors

Tuning Emission Spectrum of KSrPO4:Eu2+ Phosphor by Co-Doping with Y3+

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Influence of substitution of Al-O for Si-N on improvement of photoluminescence properties and thermal stability of Ba2Si5N8:Eu2+ red emitting phosphors

Cited by 45 publications

References 28 publications

Boron Nitride Nanoparticle Phosphors for Use in Transparent Films for Deep-UV Detection and White Light-Emitting Diodes

Boron Nitride Nanoparticle Phosphors for Use in Transparent Films for Deep-UV Detection and White Light-Emitting Diodes

Single phase multi color emitting Ca2LuTaO6: Dy3+/Eu3+ double perovskite oxide phosphors

Tuning Emission Spectrum of KSrPO4:Eu2+ Phosphor by Co-Doping with Y3+

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Single phase multi color emitting Ca₂LuTaO₆: Dy³⁺/Eu³⁺ double perovskite oxide phosphors