Synthesis and Characterization of Europium-Doped Zinc Sulphide (ZnS:Eu) Nano Particles: Nano Red Phosphor

Ahemen, I.; De, D. K.

doi:10.1166/asem.2013.1403

Cited by 12 publications

(4 citation statements)

References 15 publications

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“…Особое внимание уделяется наноразмерным частицам ZnS (КТ) [2,14,[16][17][18][19]. Результаты исследования оптических свойств КТ ZnS−Mn приведены в работах [14,[20][21][22].…”

Section: Introductionunclassified

Фотолюминесценция квантовых точек (Zn, Pb, Mn)S в полиакрилатной матрице

Исаева¹,

Smagin²

2020

Физика И Техника Полупроводников

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Solutions of quantum dots (Zn,Pb,Mn)S with different mole ratio of cations were obtained by colloidal synthesis in methyl methacrylate (MMA) medium. By thermal polymerization of MMA in the block, colloidal solutions are transferred to the glassy state. The optical transparency of PMMA/(Zn,Pb,Mn)S compositions at wavelengths >500 nm reaches 90% with the thickness of the absorbing layer up to 5 mm. Photoluminescence of compositions in the spectral region of 400–480 nm is associated with electron recombination at the levels of defects in the crystal structure of ZnS, in the range of 520–620 nm with 4T1 → 6A1 electron transition in Mn2+ ions. Excitation of photoluminescence occurs as a result of interband transitions in ZnS and energy transfer from the conduction band of ZnS to Mn2+ ion levels. The luminescence spectrum depends on the molar ratio of Mn2+ and Pb2+ ions, the sequence of introduction of the components into the reaction mixture, the wavelength of the exciting radiation.

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Section: Introductionunclassified

Фотолюминесценция квантовых точек (Zn, Pb, Mn)S в полиакрилатной матрице

Исаева¹,

Smagin²

2020

Физика И Техника Полупроводников

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“…КТ выделяют из растворов, наносят на различные подложки [21,24]. Размер КТ, как правило, не превышает 10 nm [19,20,22,39,41,42]. В процессе синтеза ионы Ln 3+ оказываются включенными в кристаллическую структуру полупроводника или находятся на поверхности частиц [19,23,25,41,42].…”

Section: Introductionunclassified

“…В процессе синтеза ионы Ln 3+ оказываются включенными в кристаллическую структуру полупроводника или находятся на поверхности частиц [19,23,25,41,42]. Возбуждение люминесценции и люминесценция КТ, легированных лантаноидами, связаны с межзонным переходам электронов и примесными уровнями в запрещенной зоне полупроводника, а также с электронными переходами в ионах Ln 3+ [19][20][21][22][23][24][25]41,42]. При исследовании структур ZnS/Eu 3+ и CdS/Eu 3+ обнаружен перенос энергии с полупроводниковой матрицы к ионам Eu 3+ , приводящий к увеличению интенсивности люминесценции ионов Ln 3+ .…”

Section: Introductionunclassified

Фотолюминесценция квантовых точек Zn-=SUB=-1-x-y-=/SUB=-Cu-=SUB=-x-=/SUB=-Eu-=SUB=-y-=/SUB=-S/EuL-=SUB=-3-=/SUB=- в полиакрилатной матрице

Smagin¹,

Исаева²,

Eremina³

2020

Журнал Технической Физики

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Zinc sulfide is one of the most popular luminescent semiconductors of group A(II)B(VI). Doping ZnS quantum dots with Ln3+ ions makes it possible to form nanoscale structures in a semiconductor matrix containing isolated centers of narrow-band luminescence. The introduction of quantum dots into the acrylate matrix further stabilizes the particles and allows them to form their morphology. Nanoscale structures of Zn1-x-yCuxEuyS/EuL3, where L − trifluoroacetate are anions, were synthesized by the method of emerging reagents in situ in the medium of methyl methacrylate (MMA). ZnS doping was performed by simultaneous introduction of soluble precursors of zinc sulfide, as well as copper and europium trifluoroacetates into the acrylate reaction mixture. Polymer optically transparent compositions of PMMA/Zn1-x-yCuxEuyS/EuL3 were obtained by radical polymerization of MMA in the block. The excitation of luminescence of compositions is associated with Interzone electron transitions in ZnS, with a system of levels that form alloying ions in the forbidden zone of ZnS, as well as with their own energy absorption by Eu3+ ions. Broadband luminescence of compositions is caused by intracrystalline defects formed in ZnS during doping. Narrow-band luminescence occurs as a result OF 5D0→7Fj electronic transitions in Eu3+ ions associated with quantum dots, as well as being in the polymer matrix independently of them. The transfer of energy from the donor levels of the semiconductor matrix to the levels of Eu3+ ions, followed by its release in the form of luminescence, was confirmed by the imposition of absorption bands doped with ZnS and excitation bands of luminescence compositions, as well as an increase in the intensity of narrow-band luminescence of Eu3+ ions while reducing the intensity of a wide band of recombination luminescence of doped ZnS. A decrease in the intensity of the ZnS recombination luminescence band with an increase in the concentration of Eu3+ >1.0∙10-3 mol/L ions is also associated with the formation of a layer of complex europium compounds on the particle surface that prevent the passage of exciting radiation to the particle core.

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“…КТ выделяют из растворов в виде порошка, наносят на различные подложки [34,47]. Размер КТ, как правило, не превышает 10 nm [30,38,43,46,48]. В процессе синтеза ионы Ln 3+ оказываются включенными в кристаллическую структуру полупроводника в объеме или на поверхности частиц [33,[37][38][39]49].…”

Section: Introductionunclassified

Фотолюминесценция композиций полиметилметакрилат/(Zn, Cu, Ag)S : Eu-=SUP=-3+-=/SUP=-

Smagin¹,

Затонская²,

Ilina³

et al. 2020

Физика Твердого Тела

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Luminescent nanoscale particles (quantum dots) (Zn,Cu,Ag)S:Eu3+ were synthesized during decomposition of thioacetamide complexes of metals in a methylmethacrylate medium during block polymerization under heating. The formation of quantum dots is confirmed by the corresponding band in the optical absorption spectrum of polymer compositions. Photoluminescence of PMMA/(Zn,Cu,Ag)S:Eu3+ compositions is manifested as a complex band associated with defects in the crystal structure formed when ZnS was doped with copper and silver ions, and a set of narrow bands of luminescence of Eu3+ ions. Luminescence excitation occurs as a result of inter-zone transitions and electron transitions from the valence band to the ZnS defect levels, and self-absorption of energy by Eu3+ ions. The relationship of ions Eu3+ particles of ZnS is confirmed by the dependence of the intensity of the broadband luminescence of ZnS with increasing concentration of ions Eu3+ and an increase in intensity narrow-band luminescence of ions Eu3+ as a result of energy transfer from levels of doped ZnS crystals on the energy levels of the ions Eu3+.

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Synthesis and Characterization of Europium-Doped Zinc Sulphide (ZnS:Eu) Nano Particles: Nano Red Phosphor

Cited by 12 publications

References 15 publications

Фотолюминесценция квантовых точек (Zn, Pb, Mn)S в полиакрилатной матрице

Фотолюминесценция квантовых точек (Zn, Pb, Mn)S в полиакрилатной матрице

Фотолюминесценция квантовых точек Zn-=SUB=-1-x-y-=/SUB=-Cu-=SUB=-x-=/SUB=-Eu-=SUB=-y-=/SUB=-S/EuL-=SUB=-3-=/SUB=- в полиакрилатной матрице

Фотолюминесценция композиций полиметилметакрилат/(Zn, Cu, Ag)S : Eu-=SUP=-3+-=/SUP=-

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