Improved photoluminescence properties of BaAl 2 Si 2 O 8 :Eu 3+ ,Tb 3+ phosphors by doping Tb 3+

Park, K.; Hakeem, D.A.

doi:10.1016/j.ceramint.2016.12.032

Cited by 35 publications

(4 citation statements)

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“…The excitation spectrum at 612 nm consisted of a broadband peak and a set of sharp line peaks. The broadband peak was 200–330 nm, originating from O 2− → Eu 3+ charge migration [16, 17]; the broadband peak of the excitation image at 544 nm was located at 200–320 nm, which was caused by 4f 8 –4f 7 5d 1 due to the Tb 3+ spin [4, 21, 22]; Figure 7b,c shows the emission spectrum of LMA:2%Tb 3+ , 5%Eu 3+ under an excitation of 274‐nm ultraviolet light, with weak emission bands, located at 438 nm ( 5 D 3 → 7 F 4 ), 451 nm ( 5 D 3 → 7 F 3 ), and 467 nm ( 7 F 0 → 5 D 2 ), showing the transition in the blue region [23]. These weak emission bands were due to the fact that the low‐energy multiphonon vibrations of AlO 4 − and AlO 4 2− groups in the lattice cannot completely bridge the high‐energy states of Eu 3+ and Tb 3+ ( 5 D 3 , 5 D 2 , 5 D 0 ) energy levels, so these emission peaks were very weak [2]; the figure shows that the characteristic peaks of Tb 3+ were 486 nm ( 5 D 4 → 7 F 6 ) and 544 nm ( 5 D 4 → 7 F 5 ) [21, 22] and the characteristic peaks of Eu 3+ were 577 nm ( 5 D 0 → 7 F 0 ), 588 nm ( 5 D 0 → 7 F 1 ), and 614 nm ( 5 D 0 → 7 F 2 ) [16, 17, 24, 25].…”

Section: Resultsmentioning

confidence: 99%

“…In recent years, phosphors doped with rare earth ions to achieve white light emission using aluminate as the substrate have advantages such as high color index, high quantum efficiency, wide excitation range, light emission in the visible range, and low cost; these phosphors are the widely studied fluorescent materials [2]. Of these, Eu 3+ and Tb 3+ are widely used because of advantages such as rich electronic energy levels, high light conversion rate, sharp linear bands, and high luminescence color purity [3,4]. Min et al [5] prepared orange-red phosphor LaMgAl 11 O 19 :Sm 3+ using the high-temperature solid-state method and studied its phase composition, crystal structure, thermal stability, and luminescence properties; Wen et al [6] prepared yellow-red phosphor LaMgAl 11 O 19 :Dy 3+ using the solid-state method.…”

Section: Introductionmentioning

confidence: 99%

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White light emission and energy transfer of LaMgAl₁₁O₁₉:Eu³⁺, Tb³⁺ phosphors

Pang

Xue

et al. 2023

Luminescence

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White-light-tunable LaMgAl 11 O 19 :x%Tb 3+ , y%Eu 3+ series phosphors were prepared using the gel-combustion method. The structure and luminescence properties were studied, and the energy transfer of Eu 3+ and Tb 3+ in the LaMgAl 11 O 19 system was also discussed. The results showed that the LaMgAl 11 O 19 matrix exhibited strong emission in the blue-light region under the excitation of ultraviolet light, which resulted in conditions suitable for the preparation of white-light-tunable phosphors.The emission spectra of LaMgAl 11 O 19 :2%Tb 3+ , y%Eu 3+ (y = 2%-9%) series phosphors were obtained through optimization experiments. It could be seen from the CIE diagram that by adjusting the doping quantities of Eu 3+ and Tb 3+ in the LaMgAl 11 O 19 host, multicolor luminescence and white light emission in a single host could be achieved. By calculating the energy transfer efficiency and critical distance between Eu 3+ and Tb 3+ series phosphors, the mechanism of energy transfer between Tb 3+ and Eu 3+ was found to be the interaction between electric quadruples.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

White light emission and energy transfer of LaMgAl₁₁O₁₉:Eu³⁺, Tb³⁺ phosphors

Pang

Xue

et al. 2023

Luminescence

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“…When the concentration is 0.003, the luminous intensity is at the highest value. Due to the effect of concentration quenching, the luminous intensity of phosphor decreases with the increasing of Mn 4+ concentration [34]. [29,38,39].…”

Section: Photoluminescence Propertiesmentioning

confidence: 99%

A Novel Red-Emitting Na2NbOF5:Mn4+ Phosphor with Ultrahigh Color Purity for Warm White Lighting and Wide-Gamut Backlight Displays

et al. 2021

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In this work, a novel red-emitting oxyfluoride phosphor Na2NbOF5:Mn4+ with an ultra-intense zero-phonon line (ZPL) was successfully synthesized by hydrothermal method. The phase composition and luminescent properties of Na2NbOF5:Mn4+ were studied in detail. The photoluminescence excitation spectrum contains two intense excitation bands centered at 369 and 470 nm, which match well with commercial UV and blue light-emitting diode (LED) chips. When excited by 470 nm blue light, Na2NbOF5:Mn4+ exhibits red light emission dominated by ZPL. Notably, the color purity of the Na2NbOF5:Mn4+ red phosphor can reach 99.9%. Meanwhile, the Na2NbOF5:Mn4+ phosphor has a shorter fluorescence decay time than commercial K2SiF6:Mn4+, which is conducive to fast switching of images in display applications. Profiting from the intense ZPL, white light-emitting diode (WLED) with high color rendering index of Ra = 86.2 and low correlated color temperature of Tc = 3133 K is realized using yellow YAG:Ce3+ and red Na2NbOF5:Mn4+ phosphor. The WLED fabricated using CsPbBr3 quantum dots (QDs) and red Na2NbOF5:Mn4+ phosphor shows a wide color gamut of 127.56% NTSC (National Television Standard Committee). The results show that red-emitting Na2NbOF5:Mn4+ phosphor has potential application prospects in WLED lighting and display backlight.

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“…As the synthesis temperature was changed from 1,000 C to 1,300 C, the intensities of the three emission peaks of Sr ions in the Sr 2-x SiO 4 -xEu phosphors, it is necessary to consider the critical concentration of the Eu 3+ ions, the volume of the unit cell, and the number of cations in the unit cell and then calculating the critical energy transfer distance. [28][29][30] The critical energy transfer distance (R o ) for the concentration quenching in the Sr 2-x SiO 4 -xEu phosphors can be calculated using the formula: R o = 2[(3 V)/(4πx c N)] 1/3 , where N,…”

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confidence: 99%

Effects of synthesis methods and different concentrations of Eu³⁺ ions on the emission properties of Sr₂SiO₄ phosphors

Chen

Yang

et al. 2021

Luminescence

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Sr 2-x SiO 4 -xEu (x = 0.01, 0.02, 0.035, and 0.05) phosphors were synthesized at 1000-1,300 C for 2 h in two different processes, the solid-state reaction (SSR) method and a two-step (TS) method, and these results revealed three important findings. The secondary Sr 3 SiO 5 phase was observed in 1,300 C-TS-synthesized Sr 2-x SiO 4 -xEu powder, but no raw materials or secondary phases were observed in the SSR-prepared Sr 2-x SiO 4 -xEu powders. The concentration quenching effect of Eu 3+ ions was really observed in TS-prepared Sr 2-x SiO 4 -xEu phosphors, which was not observed in SSR-prepared Sr 2-x SiO 4 -xEu phosphors. High emission intensity of charge transition state (CT) band was observed in the photoluminescence excitation spectra, for that the 265 and 393 nm were used as the excitation wavelengths of Sr 2-x SiO 4 -xEu phosphors. Sr 2-x SiO 4 -xEu phosphors under different synthesis processes and excitation wavelengths would have different main emission peaks in the photoluminescence emission spectra. In this study, we also well discussed and explored the relationships of photoluminescence properties with the dipole transitions (electric or magnetic) of Eu 3+ ions and the different coordination structures of Sr +2 ions. K E Y W O R D S charge transition state, concentration quenching effect, different synthesis processes, Sr 2-x SiO 4 -xEu phosphors 1 | INTRODUCTION Inorganic luminescent materials have been investigated as practical applications in many display devices, for example, flat panel screens and field emission displays. Recently, considerable efforts have been devoted to investigate materials with different emission properties,which can be used for WLEDs and optical storage devices. [1,2] As being compared with traditional incandescent and fluorescent lamps, WLEDs have the advantages of high brightness, dependability, long life-time, low power consumption, lack of toxic mercury, and environmental friendliness. [3] For that, WLEDs are promising devices for solid-state lighting and liquid-crystal display backlights because of their excellent properties. More researchers pay attention to developing phosphors and applying them to fabricate WLEDs with different emission methods. Accordingly, the investigations of highperformance phosphors with the properties of blue-light excitability, high quantum efficiency, and small thermal quenching are vital.Many methods are currently used to produce WLEDs, including combining blue LEDs with a yellow phosphor material, combining blue LEDs with the green and red phosphors, using UV-LEDs combined

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Improved photoluminescence properties of BaAl 2 Si 2 O 8 :Eu 3+ ,Tb 3+ phosphors by doping Tb 3+

Cited by 35 publications

References 35 publications

White light emission and energy transfer of LaMgAl₁₁O₁₉:Eu³⁺, Tb³⁺ phosphors

White light emission and energy transfer of LaMgAl₁₁O₁₉:Eu³⁺, Tb³⁺ phosphors

A Novel Red-Emitting Na2NbOF5:Mn4+ Phosphor with Ultrahigh Color Purity for Warm White Lighting and Wide-Gamut Backlight Displays

Effects of synthesis methods and different concentrations of Eu³⁺ ions on the emission properties of Sr₂SiO₄ phosphors

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Improved photoluminescence properties of BaAl 2 Si 2 O 8 :Eu 3+ ,Tb 3+ phosphors by doping Tb 3+

Cited by 35 publications

References 35 publications

White light emission and energy transfer of LaMgAl11O19:Eu3+, Tb3+ phosphors

White light emission and energy transfer of LaMgAl11O19:Eu3+, Tb3+ phosphors

A Novel Red-Emitting Na2NbOF5:Mn4+ Phosphor with Ultrahigh Color Purity for Warm White Lighting and Wide-Gamut Backlight Displays

Effects of synthesis methods and different concentrations of Eu3+ ions on the emission properties of Sr2SiO4 phosphors

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White light emission and energy transfer of LaMgAl₁₁O₁₉:Eu³⁺, Tb³⁺ phosphors

White light emission and energy transfer of LaMgAl₁₁O₁₉:Eu³⁺, Tb³⁺ phosphors

Effects of synthesis methods and different concentrations of Eu³⁺ ions on the emission properties of Sr₂SiO₄ phosphors