Preparation of Eu2+-doped AlN phosphors by plasma activated sintering

Shi, Zhongqi; Yang, Wanli; Bai, Shujie; Qiao, Guanjun; Jin, Zhihao

doi:10.1016/j.ceramint.2011.02.009

Cited by 19 publications

(11 citation statements)

References 14 publications

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“…The a and c were calculated by using a leastsquares procedure with an XRD pattern processing computer program (JADE 5. occupied a Si site of (SiC) x -(AlN) 1-x , as shown in Fig. 15,46 The same trendy has also been found from the results of calculation for the (SiC) x -(AlN) 1-x :0.03Eu 2+ and (SiC) x -(AlN) 1-x :0.015Eu 2+ . Table 1 shows the forming energies and lattice constants of the above doping structures ((SiC) x -(AlN) 1-x :0.06Eu 2+ ) from simulation, and the lattice constants of (SiC) x -(AlN) 1x :0.006Eu 2+ obtained from the XRD results ( Fig.…”

Section: Resultssupporting

confidence: 77%

Synthesis, crystal structure and photoluminescence of novel blue-emitting Eu²⁺-doped (SiC)_x–(AlN)_1−xphosphors by a nitriding combustion reaction

Shi

Wei

et al. 2014

RSC Adv.

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Graphical Abstract:Highlight: Novel blue-emitting (SiC) x -(AlN) 1-x :yEu 2+ phosphors were synthesized by nitriding combustion reaction, and their luminescence properties, thermal stability and possible doping site of Eu 2+ in (SiC) x -(AlN) 1-x lattice were investigated. AbstractNovel blue-emitting phosphors with the chemical composition of (SiC) x -(AlN) 1-x :yEu 2+ (x=0.06-0.50, y=0.001-0.01) were synthesized by a nitriding combustion reaction route, and the crystal structure, luminescence properties and thermal stability of the (SiC) x -(AlN) 1-x :yEu 2+ phosphors were investigated by theoretical and experimental approaches. Fist-principles calculation results prove that the solid solution of SiC with AlN promotes the doping of Eu 2+ ions into the (SiC) x -(AlN) 1-x host lattice, and Eu 2+ ions tend to occupy Al sites of the host. The synthesized (SiC) x -(AlN) 1-x :yEu 2+ phosphors absorb light in the region of 250-425 nm and show a single and symmetric broadband emission centered at about 470 nm due to the 4f 6 5d-4f 7 transitions of Eu 2+ . The luminescence intensity increases with the SiC content and reaches its maximum at x=0.20. The critical quenching concentration of Eu 2+ in the (SiC) 0.20 -(AlN) 0.80 :yEu 2+ phosphor is about y=0.006. The composition-optimized (SiC) 0.20 -2 (AlN) 0.80 :0.006Eu 2+ phosphor shows a small thermal quenching, retaining the luminance of 91.1% at 150 °C. The CIE coordinates were measured as (0.135, 0.167) with high color purity.The above results indicate that (SiC) x -(AlN) 1-x :yEu 2+ is a promising candidate as a blue-emitting ultraviolet convertible phosphor for white LEDs, and the combustion reaction route is expected to be applicable to synthesis of the present and other kinds of nitride phosphors. IntroductionWhite light emitting diodes (LEDs) have attracted increasing attention as a promising light source for solid state lighting due to their long lifetime, high luminous efficiency, energy saving, and environmental friendly characteristics. 1-3 Typically, commercial white LEDs can be generated by the combination of a blue LED chip and the famous yellow phosphor, YAG:Ce 3+ . 4 However, the disadvantages of this method are a low color-rendering index (CRI) and high correlated color temperature (CCT) due to red emission deficiency in the visible spectrum.During the last several years, white LEDs fabricated by using ultraviolet (UV)/near-ultraviolet (n-UV) chips coupled with blue, green and red phosphors have attracted much attention because of the advantageous of color stability and excellent color rending. 5-7 Therefore, the exploration of novel phosphors with strong absorption, desirable emission/excitation, and high efficiency under UV/n-UV excitation plays an important role in the development of white LEDs.Furthermore, low fabrication cost, low thermal quenching as well as high chemical stability are also required for the phosphors.As a highly efficient activator with allowed 4f-5d transitions, Eu 2+ ion has been widely investigated for the rare-earth-doped phos...

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Section: Resultssupporting

confidence: 77%

Synthesis, crystal structure and photoluminescence of novel blue-emitting Eu²⁺-doped (SiC)_x–(AlN)_1−xphosphors by a nitriding combustion reaction

Shi

Wei

et al. 2014

RSC Adv.

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“…1 Among them, aluminum nitride (AlN) has been studied as a new class of nitride host for the phosphors owing to its wide bandgap (6.2 eV), high thermal conductivity and high stability. 1,2 To date, activators such as rare-earth [3][4][5][6][7][8] and Mn 9,10 doped AlN phosphors have been reported for utilization in LEDs and FEDs. Especially, AlN:Mn is one of the promising phosphor because it can emit bright orangered color owing to the transition of 3d-electrons in a Mn ion.…”

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confidence: 99%

Red-emittingAlN:Mn²⁺phosphors prepared by combustion synthesis

Shi

Zou

Jing

et al. 2015

Funct. Mater. Lett.

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Red-emitting Mn 2þ -doped AlN (AlN:Mn 2þ ) phosphors were successfully prepared by a highly effective combustion synthesis method. The phase purity, morphology, element-composition and luminescence properties of the synthesized phosphors were investigated. X-ray diffraction (XRD) results show that the Mn 2þ -doped into the AlN host did not induce a second phase and distort the structure significantly. Scanning electron microscopy (SEM) images display that the phosphors have an irregular shape with a particle size in the range of 1-5 μm. X-ray photoelectron spectroscopy (XPS) spectrum indicates that Mn ions are divalent state. The synthesized AlN:Mn 2þ phosphors exhibit a strong red emission centered at $ 600 nm, which is ascribe to the 4 T 1 ( 4 G)-6 A 1 ( 6 S) transition of Mn 2þ under ultraviolet excitation. The emission intensity reaches its maximum when Mn 2þ -doped concentration is 3 mol%.

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“…The previous investigation has demonstrated that Si codopant is a key factor in the incorporation of Eu 2+ in AlN [12,13,16,37]. It can improve the solubility of Eu in AlN lattice, and as a result, the luminescence and the phase purity of AlN: Eu 2+ are significantly enhanced.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, AlN: Eu 2+ blue phosphor for FEDs has been widely investigated because of its excellent optical properties such as high birghtness, long lifetime, low saturation, and high thermal conductivity [10][11][12][13][14][15]. Especially finding that the co-doping of Si was essential to enhance the blue emission of Eu 2+ .…”

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Novel single-host Al1−xSixCxN1−x: Mn2+ white phosphors for field emission displays

Yuwen

Liu

Xia

et al. 2017

J Mater Sci: Mater Electron

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Preparation of Eu2+-doped AlN phosphors by plasma activated sintering

Cited by 19 publications

References 14 publications

Synthesis, crystal structure and photoluminescence of novel blue-emitting Eu²⁺-doped (SiC)_x–(AlN)_1−xphosphors by a nitriding combustion reaction

Synthesis, crystal structure and photoluminescence of novel blue-emitting Eu²⁺-doped (SiC)_x–(AlN)_1−xphosphors by a nitriding combustion reaction

Red-emittingAlN:Mn²⁺phosphors prepared by combustion synthesis

Novel single-host Al1−xSixCxN1−x: Mn2+ white phosphors for field emission displays

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Preparation of Eu2+-doped AlN phosphors by plasma activated sintering

Cited by 19 publications

References 14 publications

Synthesis, crystal structure and photoluminescence of novel blue-emitting Eu2+-doped (SiC)x–(AlN)1−xphosphors by a nitriding combustion reaction

Synthesis, crystal structure and photoluminescence of novel blue-emitting Eu2+-doped (SiC)x–(AlN)1−xphosphors by a nitriding combustion reaction

Red-emittingAlN:Mn2+phosphors prepared by combustion synthesis

Novel single-host Al1−xSixCxN1−x: Mn2+ white phosphors for field emission displays

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Synthesis, crystal structure and photoluminescence of novel blue-emitting Eu²⁺-doped (SiC)_x–(AlN)_1−xphosphors by a nitriding combustion reaction

Synthesis, crystal structure and photoluminescence of novel blue-emitting Eu²⁺-doped (SiC)_x–(AlN)_1−xphosphors by a nitriding combustion reaction

Red-emittingAlN:Mn²⁺phosphors prepared by combustion synthesis