Phase transition in ZnS thin film phosphor

Kryshtab, T.; Khomchenko, V. S.; Andraca-Adame, J. A.; Khachatryan, V. B.; Mazin, M. O.; Rodionov, V. N.

doi:10.1016/j.jcrysgro.2004.11.205

Cited by 7 publications

(7 citation statements)

References 5 publications

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“…It was revealed [6] that Ga and Cl act not only as co-dopant for improvement of luminescent properties, but also as a promotor of collecting and secondary recrystallization processes, which facilitate a coarse-grain formation.…”

Section: A Electroluminescent Display Device Based On Zns〈cuga〉 Filmsmentioning

confidence: 99%

“…Doping the ZnS film with copper and chlorine during the annealing process reduces the phase transition temperature -from 1020 down to 800 °C [8]. The transition of ZnS film sphalerite lattice to wurtzite results in the displacement of the blue emission band towards the short-wave range by 0.07 eV [6]. It is known that the sphalerite structure predominates when the bonding is predominantly covalent, whereas the more ionic systems favor the wurtzite form [8].…”

Section: A Electroluminescent Display Device Based On Zns〈cuga〉 Filmsmentioning

confidence: 99%

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Untitled

2020

Semicond. phys. quantum electron. and optoelectron.

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The review is devoted to the results of studies on the structure, morphology, optical and luminescent properties of thin films doped with the modified Close Space Sublimation method. Using this method, ZnO and ZnS films were doped with impurities of various metals-Ag, Cu, Ga. It has been shown that doping the films leads to an improvement in the crystal structure and radiative properties of films. When using doping with this method, cathodoluminescent screens with high luminance have been manufactured. The screens show more deep green color than C1 and C2 commercial phosphors. The luminance values at 300 K are 200 cd/m 2 for the ZnS〈Cu,Ga〉 film and 1100 cd/m 2 for the ZnO〈Cu, Ga〉 ones. At 77 K, the cathodoluminescence luminance for ZnO〈Cu,Ga〉 film is 3700 cd/m 2 and has not reached the limit value. Doping the ZnO with copper has greatly improved the crystal structure and made it possible to obtain films with white-light emission. Ag doping suppresses the wide visible bands of photoluminescence spectra. The intensity of ultraviolet band is 15-fold increased as compared to their reference non-doped films. The ultraviolet/visible emission ratio reached 20.

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Section: A Electroluminescent Display Device Based On Zns〈cuga〉 Filmsmentioning

confidence: 99%

Section: A Electroluminescent Display Device Based On Zns〈cuga〉 Filmsmentioning

confidence: 99%

Untitled

2020

Semicond. phys. quantum electron. and optoelectron.

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“…This also can influence the rate of G-center formation. Besides, it is known, that ZnS doping by Cu promotes the lattice transformation from hexagonal to cubic phase while the Cl incorporation leads to opposite transformation [26]. In this case, the Cl atoms incorporation can hampers Cu i diffusion.…”

Section: The Analysis Of the Processes Of B-and G-centers Formationmentioning

confidence: 99%

Formation of Cu-related emission centers under thermal doping of ZnS powders with CuCl and CuCl2

Bacherikov

Zhuk

Baran

et al. 2015

Journal of Luminescence

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“…Zinc sulfide doped with Cu or Mn is a good powder phosphor having about 100 % quantum efficiency [6]. Mn doped ZnS nanoparticles are suitable for potential applications such as optoelectronic, bio photonic devices, and nano tuned devices and it can also be used for fluorescence imaging in living tissues.…”

Section: Introductionmentioning

confidence: 99%

Paramagnetic nature of Mn doped ZnS nano particles in opto electronic device application

Suganthi¹,

Pushpanathan²

2016

J Mater Sci: Mater Electron

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Manganese (Mn 2? ) doped ZnS nano sized powder was prepared by co precipitation method with different concentration from 1 to 5 %. The X-ray diffraction pattern indicates that the prepared powders are in cubic structure with the crystallite sizes lie in the range of 10-12 nm. Diffuse reflectance studies enlightens that an increment in the band gap (3.38-3.55 eV) with increasing dopant. The morphology and size of the sample could be intuitively determined by field emission scanning electron microscope and it shows that ZnS and Mn doped ZnS nanoparticles are appeared as spherical shape. The replacement of Zn by Mn is confirmed by energy dispersive analysis. TEM images confirm the spherical shape of the nanoparticles and SAED images exhibit the crystalline nature and confirm the cubic nature of the synthesized samples. The prepared luminescent nanoparticles of Mn doped ZnS have emission peak at around 617 nm. The symmetry and electronic structure of the Mn doped samples are studied with electron paramagnetic resonance.The paramagnetic nature of Mn doped ZnS nano particles are validated by using vibrating sample magnetometer spectra at room temperature. Thermal analysis measurement of the samples shows that the thermal stability of Mn doped ZnS is higher than the undoped ZnS. This corroborates that ZnS:Mn doping is attributed to the removal of water and it enhanced the crystallinity.

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Phase transition in ZnS thin film phosphor

Cited by 7 publications

References 5 publications

Untitled

Untitled

Formation of Cu-related emission centers under thermal doping of ZnS powders with CuCl and CuCl2

Paramagnetic nature of Mn doped ZnS nano particles in opto electronic device application

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