A blue-emitting Sc silicate phosphor for ultraviolet excited light-emitting diodes

Wang, Qian; Zhu, Ge; Xin, Shuangyu; Ding, Xin; Xu, Junli; Wang, Yuansheng; Wang, Yuhua

doi:10.1039/c5cp02899j

Cited by 25 publications

(10 citation statements)

References 37 publications

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“…The spectra are drastically changed in the presence of Dy 3+ ions. The PLE spectrum of GdF 3 :2%Dy 3+ , 75 2%Tb 3+ monitored by 542 nm covers not only characteristic excited peaks of Gd 3+ and Tb 3+ ions, but also a new excited peak at 386 nm. The new excited peak belongs to Dy 3+ ion.…”

Section: Characterizationsmentioning

confidence: 91%

“…X-ray powder diffraction (XRD) data for the prepared samples (GdF 3 : Dy 3+ , Tb 3+ ,Eu 3+ ) were taken using a 75 Rigaku D/max-RA X-ray diffractometer with Cu K α radiation (λ= 0.15406 nm) and Ni filter, operating at 20 mA, 30 kV, scanning speed, step length and diffraction range were 10 °/min, 0.1° and 20-70°, respectively. The measurements of photoluminescence (PL), photoluminescence excitation (PLE) 80 spectra and the luminescence decay curves were carried out by a Jobin Yvon FluoroMax-4 using a 150W xenon lamp as the excitation source.…”

Section: Characterizationsmentioning

confidence: 99%

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Energy transfer and tunable multicolor emission and paramagnetic properties of GdF₃:Dy³⁺,Tb³⁺,Eu³⁺ phosphors

Guan

et al. 2016

Phys. Chem. Chem. Phys.

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A series of Dy(3+), Tb(3+), Eu(3+) singly or doubly or triply doped GdF3 phosphors were synthesized by a glutamic acid assisted one-step hydrothermal method. The samples were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM) and photoluminescence (PL) spectroscopy. The results show that the synthesized samples are all pure GdF3. The obtained samples have a peanut-like morphology with a diameter of about 270 nm and a length of about 600 nm. Under UV excitation, GdF3:Dy(3+), GdF3:Tb(3+) and GdF3:Eu(3+) samples exhibit strong blue, green and red emissions, respectively. By adjusting their relative doping concentrations in the GdF3 host, the different color hues of green and red light are obtained by co-doped Dy(3+), Tb(3+) and Tb(3+), Eu(3+) ions in the GdF3 host, respectively. Besides, there exist two energy transfer pairs in the GdF3 host: (1) Dy(3+) → Tb(3+) and (2) Tb(3+) → Eu(3+). More significantly, in the Dy(3+), Tb(3+), and Eu(3+) tri-doped GdF3 phosphors, white light can also be achieved upon excitation of UV light by adjusting the doping concentration of Eu(3+). In addition, the obtained samples also exhibit paramagnetic properties at room temperature (300 K) and low temperature (2 K). It is obvious that multifunctional Dy(3+), Tb(3+), Eu(3+) tri-doped GdF3 materials including tunable multicolors and intrinsic paramagnetic properties may have potential applications in the field of full-color displays.

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Section: Characterizationsmentioning

confidence: 91%

Section: Characterizationsmentioning

confidence: 99%

Energy transfer and tunable multicolor emission and paramagnetic properties of GdF₃:Dy³⁺,Tb³⁺,Eu³⁺ phosphors

Guan

et al. 2016

Phys. Chem. Chem. Phys.

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“…In recent years, rare‐earth‐doped materials have aroused great interest due to their unique optical properties, and have been widely used in optical appliances, [ 1 ] plasma displays, [ 2 ] fluorescent lamps [ 3 ] and biomedical imaging. [ 4 ] Over the past few decades, a variety of researches have focused on the substrates of fluorides, [ 5 ] sulfides, [ 6 ] carbonates, [ 7 ] aluminates, [ 8 ] silicates, [ 9 ] and oxide. [ 10,11 ] In all these substrates, silica is a typical non‐metallic oxide and since it has good chemical stability, biocompatibility, high mechanical strength, low price and low toxicity it is suitable for analysis of drug traces, biomarkers, display technologies and trace analysis of composites.…”

Section: Introductionmentioning

confidence: 99%

Preparation and fluorescence characterization of monodisperse core‐shell structure SiO₂@SiO₂:Tb(1,2‐BDC)₃phen microspheres by a sol‐seed method

Liu

Zhu

et al. 2021

Luminescence

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The SiO2@SiO2:Tb(1,2‐BDC)3phen microspheres with monodispersed core‐shell structure, are kind of fluorescent particles, which are prepared by a seeded growth method under the catalysis of glacial acetic acid (1,2‐BDC, 1,2‐benzenedicarboxylic acid; phen, 1,10‐phenanthroline). Firstly, silica seed was fabricated by the hydrolysis of ethyl orthosilicate, and the Tb(1,2‐BDC)3phen was prepared by using 1,2‐BDC and phen. Then, a thin mesoporous silica shell doped with Tb(1,2‐BDC)3phen was grown on the prepared monodisperse silica colloids. The prepared phosphor was analyzed by Fourier‐transform infrared spectroscopy, X‐ray diffraction analysis, scanning electron microscopy, transmission electron microscopy, thermogravimetric and fluorescence spectroscopy. The experimental results showed that the diameter of the SiO2@SiO2:Tb((1,2‐BDC)3phen microsphere was about 200 nm with a typical core‐shell structure, among which the diameter of the silica core was 180 nm, and that of the mesoporous silicon shell doped with terbium complex was about 10 nm. The fluorescence intensity of SiO2@SiO2:Tb((1,2‐BDC)3phen microsphere is nearly three times higher than that of Tb((1,2‐BDC)3phen complexes. The prepared microspheres could be widely used in bio‐imaging, optoelectronic appliances and medical diagnosis.

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“…Among a large number of possible matrices, silicate compound system is deemed to be applicable candidates as the luminescence matrix because of their excellent chemical, physical, and thermal stability, relatively easy preparation as well as their abundance in nature . As a result, many Eu 2+ ‐doped silicate‐based blue‐ and green‐emitting phosphor have been investigated, for instance the commercial (Sr,Ba) 2 SiO 4 :Eu 2+ , RbNa(Li 3 SiO 4 ) 2 :Eu 2+ , K 2 Ba 7 Si 16 O 40 :Eu 2+ , KBaYSi 2 O 7 :Eu 2+ , RbBaScSi 3 O 9 :Eu 2+ , etc.…”

Section: Introductionmentioning

confidence: 99%

“…[18][19][20] Among a large number of possible matrices, silicate compound system is deemed to be applicable candidates as the luminescence matrix because of their excellent chemical, physical, and thermal stability, relatively easy preparation as well as their abundance in nature. 21,22 As a result, many Eu 2+ -doped silicate-based blue-and green-emitting phosphor have been investigated, for instance the commercial (Sr,Ba) 2 SiO 4 :Eu 2+ , RbNa(Li 3 SiO 4 ) 2 :Eu 2+ , 23 K 2 Ba 7 Si 16 O 40 :Eu 2+ , 24 KBaYSi 2 O 7 :Eu 2+ , 25 RbBaScSi 3 O 9 :Eu 2+ , 20 etc. Among them, the Sc silicates have special three dimensional framework structures comprising of abundant tetrahedra and octahedra, which provide adequate crystal chemistry environment for various active ions.…”

Section: Introductionmentioning

confidence: 99%

Novel cyan‐emitting KBaScSi₂O₇:Eu²⁺ phosphors with ultrahigh quantum efficiency and excellent thermal stability for WLEDs

Zhong

Liu

et al. 2019

J Am Ceram Soc

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Owing to the conventional phosphor‐converted white LEDs (pc‐WLEDs) generally suffer from blue‐green cavity, thus, developing an appropriate phosphors covering both the blue and green regions in their emission spectra are very urgent. Herein, a novel Sc silicate phosphor, KBaScSi2O7:Eu2+ (KBSS:Eu2+), has been successfully designed and prepared via a solid‐state reaction. The crystal structure, luminescent properties, thermal quenching, quantum efficiency as well as its application in UV‐pumped WLEDs have been investigated systematically. The KBSS:Eu2+ phosphor exhibits a strong and broad excitation band ranging from 290 to 450 nm, and gives a sufficient cyan emission of 488 nm with a full‐width half‐maximum (FWHM) of 70 nm, which filled the blue‐green cavity. Importantly, the optimized KBSS:Eu2+ phosphor possesses an ultrahigh quantum efficiency (QE) up to 91.3% and an excellent thermal stability retaining 90% at 423 K with respect to that measured at room temperature. Finally, the as‐fabricated UV‐based WLEDs device, with only coupled the mixture of KBSS:Eu2+ cyan phosphor and CaAlSiN3:Eu2+ red ones to a commercial 365nm UV chip, exhibits a satisfactory color‐rendering index (Ra = 88.6), correlated color temperature (CCT = 3770K), and luminous efficiency (LE = 21 lm/W).

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A blue-emitting Sc silicate phosphor for ultraviolet excited light-emitting diodes

Cited by 25 publications

References 37 publications

Energy transfer and tunable multicolor emission and paramagnetic properties of GdF₃:Dy³⁺,Tb³⁺,Eu³⁺ phosphors

Energy transfer and tunable multicolor emission and paramagnetic properties of GdF₃:Dy³⁺,Tb³⁺,Eu³⁺ phosphors

Preparation and fluorescence characterization of monodisperse core‐shell structure SiO₂@SiO₂:Tb(1,2‐BDC)₃phen microspheres by a sol‐seed method

Novel cyan‐emitting KBaScSi₂O₇:Eu²⁺ phosphors with ultrahigh quantum efficiency and excellent thermal stability for WLEDs

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A blue-emitting Sc silicate phosphor for ultraviolet excited light-emitting diodes

Cited by 25 publications

References 37 publications

Energy transfer and tunable multicolor emission and paramagnetic properties of GdF3:Dy3+,Tb3+,Eu3+ phosphors

Energy transfer and tunable multicolor emission and paramagnetic properties of GdF3:Dy3+,Tb3+,Eu3+ phosphors

Preparation and fluorescence characterization of monodisperse core‐shell structure SiO2@SiO2:Tb(1,2‐BDC)3phen microspheres by a sol‐seed method

Novel cyan‐emitting KBaScSi2O7:Eu2+ phosphors with ultrahigh quantum efficiency and excellent thermal stability for WLEDs

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Energy transfer and tunable multicolor emission and paramagnetic properties of GdF₃:Dy³⁺,Tb³⁺,Eu³⁺ phosphors

Energy transfer and tunable multicolor emission and paramagnetic properties of GdF₃:Dy³⁺,Tb³⁺,Eu³⁺ phosphors

Preparation and fluorescence characterization of monodisperse core‐shell structure SiO₂@SiO₂:Tb(1,2‐BDC)₃phen microspheres by a sol‐seed method

Novel cyan‐emitting KBaScSi₂O₇:Eu²⁺ phosphors with ultrahigh quantum efficiency and excellent thermal stability for WLEDs