The structure-dependent luminescence of Eu3+-activated MBaY(BO3)2 (M=Na, K) nanoparticles

Qiao, Xuebin; Jing, Xin; Nie, Xinming; Xu, Jian; Shuai, Qi; Jiang, Zhongsai

doi:10.1016/j.dyepig.2017.04.008

Cited by 36 publications

(10 citation statements)

References 30 publications

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“…They are ecofriendly nanotubes with low cost compared to carbon nanotubes. HNTs are widely used as additives in polymers, for electric components, drug delivery systems, and cosmetics, and for personal care products applications [15][16][17][18][19]. Du et al have studied the thermal stability and flame retardant effects of HNTs in polypropylene (PP)-based composites.…”

Section: Introductionmentioning

confidence: 99%

Effects of halloysite nanotubes on the mechanical, thermal, and flammability properties of PP‐g‐MAH compatibilized polyethylene terephthalate/polypropylene nanocomposites

et al. 2017

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This work investigates the effect of HNTs content on the mechanical, thermal and flammability properties of polypropylene grafted maleic anhydride (PP‐g‐MAH) compatibilized polyethylene terephthalate/polypropylene (PET/PP) blends. The synthesized composites were characterized after compounding using a twin‐screw extruder and injection‐molding machine. The tensile, flexural and impact strengths values peaked at 2 parts per hundred resin (phr). Thermogravimetric analysis showed a marked improvement in thermal stability of the fabricated composites. A gradual increase in T50 and Tmax with increasing HNTs content was observed. The limiting oxygen index revealed a linear relationship with HNTs content. Transmission electron microscopy images showed uniform dispersion of nanotubes at lower HNTs content and agglomerated structures were formed at higher HNTs content due to inter‐tubular interactions both in face‐to‐face or face‐to‐edge manner. The improvements in thermal stability and flammability are attributed to these interactions. Due to improved mechanical properties and flammability, the fabricated composites have potential applications in automotive industries. POLYM. COMPOS., 39:E1554–E1564, 2018. © 2017 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Effects of halloysite nanotubes on the mechanical, thermal, and flammability properties of PP‐g‐MAH compatibilized polyethylene terephthalate/polypropylene nanocomposites

et al. 2017

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“…Under excited at 395 nm, all phosphors presented a series of characteristic emissions, which located at 590 nm ( 5 D 0 → 7 F 1 transition), 611 nm ( 5 D 0 → 7 F 2 transition), 656 nm ( 5 D 0 → 7 F 3 transition), and 705 nm ( 5 D 0 → 7 F 4 transition). 11,52–56 However, with doping Lu 3+ ions into BEB, the PL intensity increased until x = 0.3 (the intensity of BEB:0.3Lu 3+ was almost 1.34 times of that of BEB), and then dropped rashly after doping Lu 3+ ions heavily. The results can be explained by the concentration quenching of Eu 3+ ions.…”

Section: Resultsmentioning

confidence: 96%

“…Surprisingly, the optimal phosphor BEB:0.3Lu 3+ presented better internal quantum efficiency (IQE: 87%) than some other reported red phosphors, such as Na 3 Sc 2 (PO 4 ) 3 :0.35Eu 3+ (IQE: 49%) and MBaY 1− x Eu x (BO 3 ) 2 (IQE: 48%). 11,23 Moreover, the phosphors possessed good thermal stability (the photoluminescence intensity at 423 K was about 52% of that at 303 K). Finally, for investigating the application of the red emitting BEB: x Eu 3+ phosphors, we made a fabricated prototype warm WLED device by coating our red BEB:0.3Lu 3+ , commercial blue BaMgAl 10 O 17 :Eu 2+ (BAM:Eu 2+ ) and green (Ba,Sr) 2 SiO 4 :Eu 2+ phosphors on a 395 nm-emitting (NUV) chip.…”

Section: Introductionmentioning

confidence: 99%

Lu³⁺ doping induced photoluminescence enhancement in novel high-efficiency Ba₃Eu(BO₃)₃ red phosphors for near-UV-excited warm-white LEDs

Annadurai

Liang

et al. 2018

RSC Adv.

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doped BEB red phosphors were successfully synthesized by a hightemperature solid-state reaction method. X-ray diffraction (XRD) patterns, excitation and emission spectra, decay lifetimes, CIE coordinates, internal quantum efficiency, and thermal stability of these phosphors were systematically studied. Under 395 nm excitation, these phosphors exhibited highbrightness red emissions centred at 611 nm. In addition, it was found that doping appropriate amounts of Lu 3+ ions into BEB phosphors can improve their photoluminescence intensity and internal quantum efficiency. The integrated emission intensity of BEB:0.3Lu 3+ phosphor was about 1.34 times that of BEB phosphor. Compared with commercial red phosphor Y 2 O 2 S:Eu 3+ , BEB:0.3Lu 3+ phosphor showed better color purity (91.4%) and higher emission intensity (about 3.25 times). Surprisingly, the BEB:0.3Lu 3+ phosphor had a high internal quantum efficiency of almost 87%, which was higher than that of 83% for BEB phosphors. Meanwhile, the BEB:0.3Lu 3+ phosphors also exhibited good thermal stability with activation energy around 0.14 eV, and the integrated emission intensity at 423 K remained about 52% of that at 303 K. Finally, by using commercial BaMgAl 10 O 17 :Eu 2+ blue phosphors, commercial (Ba,Sr) 2 SiO 4 :Eu 2+ green phosphors, as-prepared BEB:0.3Lu 3+ red phosphors and a 395 nm nearultraviolet-emitting light-emitting diode (LED) chip, a prototype warm white LED device was fabricated, which showed good color rendering index (CRI ¼ 84.7) and low correlated color temperature (CCT ¼ 3377 K).

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“…It can be seen that the absorption rate of the CEBO red phosphor is ∼44.8% and the quantum yield is ∼95.6% (for detailed calculation information, see the Supporting Information). In fact, the performance is much better than that of some reported red phosphors, such as Gd 2 O 2 S:Eu 3+ , 50 Sr 2 LaSbO 6 :Eu 3+ , 51 Ba 3 P 4 O 13 :Eu 3+ , 52 and NaY-(BO 3 ) 2 :Eu 3+ , 53 revealing that CEBO is an efficient red phosphor for fabricating a WLED with a UV chip.…”

Section: ■ Experimentalmentioning

confidence: 89%

The Non-Concentration-Quenching Phosphor Ca₃Eu₂B₄O₁₂ for WLED Application

et al. 2020

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Commercial white LED devices usually suffer from a high color temperature and poor color rendering. Developing a new, efficient, and stable red phosphor is the key to solving this problem. In this work, a series of pure Ca3Y2‑xB4O12:xEu3+ (0 < x ≤ 2) samples, including the new and fully transitional borate phosphor Ca3Eu2B4O12 (CEBO), have been successfully prepared by solid-state reaction synthesis. CEBO is isostructural with Ca3Y2B4O12 (CYBO), belonging to the orthorhombic system with space group Pnma (No. 62). Under optimal 393 nm excitation, this borate exhibits a strong red emission, peaking at 615 nm, with high color purity. Interestingly, the luminescence of CEBO is relatively higher than that of CYBO:Eu3+ phosphors. The quantum yield of this non-concentration-quenching phosphor reaches 95.6%. Furthermore, a warm pc-WLED device has been fabricated by mixing as-prepared CEBO powders and commercial BaMgAl10O17:Eu2+ and (Sr, Ba)2SiO4:Eu2+ phosphors, which exhibits a high color rendering index (Ra = 83.7) along with a color temperature of around 3883 K. The present work indicates that this new borate, with outstanding quantum efficiency and favorable thermal stability, can be used as a red phosphor for application in WLEDs.

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The structure-dependent luminescence of Eu3+-activated MBaY(BO3)2 (M=Na, K) nanoparticles

Cited by 36 publications

References 30 publications

Effects of halloysite nanotubes on the mechanical, thermal, and flammability properties of PP‐g‐MAH compatibilized polyethylene terephthalate/polypropylene nanocomposites

Effects of halloysite nanotubes on the mechanical, thermal, and flammability properties of PP‐g‐MAH compatibilized polyethylene terephthalate/polypropylene nanocomposites

Lu³⁺ doping induced photoluminescence enhancement in novel high-efficiency Ba₃Eu(BO₃)₃ red phosphors for near-UV-excited warm-white LEDs

The Non-Concentration-Quenching Phosphor Ca₃Eu₂B₄O₁₂ for WLED Application

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The structure-dependent luminescence of Eu3+-activated MBaY(BO3)2 (M=Na, K) nanoparticles

Cited by 36 publications

References 30 publications

Effects of halloysite nanotubes on the mechanical, thermal, and flammability properties of PP‐g‐MAH compatibilized polyethylene terephthalate/polypropylene nanocomposites

Effects of halloysite nanotubes on the mechanical, thermal, and flammability properties of PP‐g‐MAH compatibilized polyethylene terephthalate/polypropylene nanocomposites

Lu3+ doping induced photoluminescence enhancement in novel high-efficiency Ba3Eu(BO3)3 red phosphors for near-UV-excited warm-white LEDs

The Non-Concentration-Quenching Phosphor Ca3Eu2B4O12 for WLED Application

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Product

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Lu³⁺ doping induced photoluminescence enhancement in novel high-efficiency Ba₃Eu(BO₃)₃ red phosphors for near-UV-excited warm-white LEDs

The Non-Concentration-Quenching Phosphor Ca₃Eu₂B₄O₁₂ for WLED Application