Effect of the Cu content and ZnS treatment on the characteristics of synthesized ZnS:(Cu, Cl) electroluminescent phosphors

Sychov, M. M.; Огурцов, К. А.; Lebedev, V. T.; Kulvelis, Yu. V.; Török, Gy.; Соколов, А. Е.; Trunov, V. A.; Bakhmetyev, Vadim V.; Kotomin, A. A.; Dushenok, S. A.; Kozlov, A. S.

doi:10.1134/s1063782612050223

Cited by 25 publications

(15 citation statements)

References 5 publications

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“…act as a flux [21,24,25]. According to [4,11], it may contribute to introduction of an activator (copper or some other dopants) into lattice of luminophore. In the further relaxation processes (especially if synthesis conditions facilitate the formation of unstable structural states or phases), presence of magnesium promotes deformation processes, which leads to changes in symmetry of ZnS crystal lattice.…”

Section: Resultsmentioning

confidence: 99%

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Luminescent properties of fine-dispersed self-propagating high-temperature synthesized ZnS:Cu,Mg

Bacherikov¹

2017

Semicond. Phys. Quantum Electron. Optoelectron.

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Abstract. The influence of magnesium impurities on luminescent properties of ZnS:Cu,Mg using obtained by self-propagating high-temperature synthesis (SHS) has been investigated. Special attention was paid to changes of photoluminescence spectra caused by relaxation processes in ZnS:Cu,Mg-SHS. It was shown that introduction of magnesium into ZnS:Cu-SHS leads to a change in symmetry of ZnS crystal lattice. It leads to relaxation quenching the photoluminescence bands caused by presence of copper impurities in ZnS.

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Section: Resultsmentioning

confidence: 99%

“…At the same time, luminescent characteristics of light-emitting materials largely depend on the material structure [4,5], ratio of impurities acting as luminescence activators and coactivators [6,7], etc. Studies of the materials obtained using unconventional methods, such as SHS, are of particular interest.…”

Section: Introductionmentioning

confidence: 99%

Luminescent properties of fine-dispersed self-propagating high-temperature synthesized ZnS:Cu,Mg

Bacherikov¹

2017

Semicond. Phys. Quantum Electron. Optoelectron.

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“…Therefore there is a search for new approaches of improvements of their brightness. For example, we have suggested to use electron beam, plasma or shock wave treatment of ZnS and SrGa 2 S 4 precursors in order to create structural defects and thus improve diffusion and solubility of activator (copper) or sulfur in luminescent matrix and improve brightness [2][3][4][5][6]. In the works [7][8][9] it is suggested to fabricate phosphor in a highpressure vessel in the conditions of combustion and/or explosion of explosive substances, which is placed into a vessel together with a charge mixture.…”

Section: Introductionmentioning

confidence: 99%

Effect of shock wave treatment on luminescence of ZnS:Cu,Cl phosphors

et al. 2015

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“…Phosphor's luminescent properties determines their quality and applications. Luminescence depend on a number of factors, such as chemical composition, crystal structure, dopants, etc., and can be controlled using various synthetic technique and treatments [1][2][3][4]. It is well known, that for the efficient luminescence, especially cathodoluminescence, crystallite size is very important, since boundaries between crystallites play role of non-radiative recombination sites [3].…”

Section: Introductionmentioning

confidence: 99%

Effect of composition and synthesis route on structure and luminescence of NaBaPO₄:Eu²⁺and ZnAl₂O₄:Eu³⁺

Bakhmetyev

Lev

Vitalyi

et al. 2016

Proc. 14th Int. Conf. On Global Research and Education, Inter-Academia 2015

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NaBaPO4:Eu 2+ and ZnAl2O4:Eu 3+ phosphors with different dopant content were prepared by solution-combustion (SC) and sol-gel (SG) method. SC route gives samples with high crystallinity, that does not always leads to increase in luminescent properties due to formation of admixture phases. In NaBaPO4 phosphor series, crystallite size reversly depends on admixture Ba3(PO4)2 phase content. Increase in europium concentration up to 10% lead to decrease of crystallite size in samples prepared by SC method, but increase of crystallite size in samples prepared by SG method. For ZnAl2O4:Eu 3+ , prepared by sol-gel technique, increase in Eu 3+ concentration leads to amorphization of structure. IntroductionInorganic phosphors are widely used in modern life in a number of different applications such as light sources, lasers, electronic devices, medicine etc. Phosphor's luminescent properties determines their quality and applications. Luminescence depend on a number of factors, such as chemical composition, crystal structure, dopants, etc., and can be controlled using various synthetic technique and treatments [1][2][3][4]. It is well known, that for the efficient luminescence, especially cathodoluminescence, crystallite size is very important, since boundaries between crystallites play role of non-radiative recombination sites [3]. Influence of synthesis temperature, time on crystallite size was extensively studied for many phosphors, however effect of activator content on crystallite size is not a well known subject [4,5]. For example, effect of Eu 3+ concentration on crystal structure of Y2O3 phosphors, prepared by Pechini and solution-combustion methods were described [4,5]. It was shown that increase of dopant concentration leads to increase of crystallite size of Y2O3: Eu 3+ phosphor prepared by sol-gel method that was explained by acceleration the phenomenon of nucleation of crystals in the presence of impurities. However it is also known that increase of impurities concentration leads to increase in a number of nucleation centers and therefore decrease of crystallite size. In this work synthetic route influence on effect of dopant concentration on crystal structure and luminescent properties of phosphors prepared via different synthetic methods was studied. There were chosen sol-gel (SG) method, as one of the most well-known and widely used synthetic route, which however consists of several steps and is time consuming, and solution-combustion (SC) method, as fast and energy efficient technique. Zinc aluminate spinel and mixed sodium-barium phosphate were used as a host material with europium in three-and divalent states as dopant. NaBaPO4:Eu 2+ phosphor is known as chemically stable and promising material for W-LED application. ZnAl2O4 may be used as UV emitting

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Effect of the Cu content and ZnS treatment on the characteristics of synthesized ZnS:(Cu, Cl) electroluminescent phosphors

Cited by 25 publications

References 5 publications

Luminescent properties of fine-dispersed self-propagating high-temperature synthesized ZnS:Cu,Mg

Luminescent properties of fine-dispersed self-propagating high-temperature synthesized ZnS:Cu,Mg

Effect of shock wave treatment on luminescence of ZnS:Cu,Cl phosphors

Effect of composition and synthesis route on structure and luminescence of NaBaPO₄:Eu²⁺and ZnAl₂O₄:Eu³⁺

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Effect of the Cu content and ZnS treatment on the characteristics of synthesized ZnS:(Cu, Cl) electroluminescent phosphors

Cited by 25 publications

References 5 publications

Luminescent properties of fine-dispersed self-propagating high-temperature synthesized ZnS:Cu,Mg

Luminescent properties of fine-dispersed self-propagating high-temperature synthesized ZnS:Cu,Mg

Effect of shock wave treatment on luminescence of ZnS:Cu,Cl phosphors

Effect of composition and synthesis route on structure and luminescence of NaBaPO4:Eu2+and ZnAl2O4:Eu3+

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Effect of composition and synthesis route on structure and luminescence of NaBaPO₄:Eu²⁺and ZnAl₂O₄:Eu³⁺