Structural characterization and optical properties of dysprosium doped strontium calcium magnesium di-silicate phosphor by solid state reaction method

Sahu, Ishwar Prasad; Bisen, D. P.; Brahme, Nameeta

doi:10.1016/j.displa.2015.03.002

Cited by 38 publications

(14 citation statements)

References 41 publications

(37 reference statements)

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“…ML also appears during the deformation caused by the phase transition or growth of certain crystals as well as during separation of two solids in contact. ML has been observed in insulators, semiconductors as well as in conductors [12].…”

mentioning

confidence: 99%

Enhanced luminescence performance of Sr2MgSi2O7:Eu2+ blue long persistence phosphor by co-doping with Ce3+ ions

Sahu

Bisen

Brahme

et al. 2015

J Mater Sci: Mater Electron

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A series of rare earth doped and co-doped distrontium magnesium di-silicate phosphors namely: Sr 2 MgSi 2 O 7 :Ce 3? , Sr 2 MgSi 2 O 7 :Eu 2? and Sr 2 MgSi 2 O 7 :Eu 2? , Ce 3? were prepared by the solid state reaction method. The crystal structures of sintered phosphors were an akermanite type structure which belongs to the tetragonal crystallography. The chemical compositions of sintered phosphors were confirmed by energy dispersive X-ray spectroscopy (EDS). Under the ultraviolet excitation, the emission spectra of both Sr 2 MgSi 2 O 7 :Eu 2? and Sr 2 MgSi 2 O 7 :Eu 2? , Ce 3? phosphors were composed of a broad band peaking at 460 nm, belonging to the broad emission band. When the Sr 2 MgSi 2 O 7 :Eu 2? phosphor is co-doped with Ce 3? ions, thermouminescence, photoluminescence, afterglow and mechanoluminescence (ML) intensity were strongly enhanced. The Sr 2 MgSi 2 O 7 :Eu 2? phosphor showed some afterglow with short persistence time. Ce 3? phosphors were proportionally increased with the increase of impact velocity, which suggests that these phosphors can be used as sensors to detect the stress of an object. Thus the present investigation indicates that the piezoelectricity is responsible to produce ML in prepared phosphors.

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confidence: 99%

Enhanced luminescence performance of Sr2MgSi2O7:Eu2+ blue long persistence phosphor by co-doping with Ce3+ ions

Sahu

Bisen

Brahme

et al. 2015

J Mater Sci: Mater Electron

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“…In the practical system, the electron traps and the hole traps may not be both equally abundant or important in terms of their contribution to the white light emission, as suggested in Fig. 9 [36,23,27]. …”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 95%

“…When rare earth ions are excited, a great deal of electrons and holes are generated. Some free electrons or free holes transport in the conduction band or the valence band respectively, and then are trapped by the trap levels [27]. The trapped electrons or holes are released back to the conduction or valence band thermally and recombine with the opposite charges at the luminescent centers accompanied by the emission of the light.…”

Section: Thermoluminescence (Tl)mentioning

confidence: 99%

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Luminescence properties of dysprosium doped calcium magnesium silicate phosphor by solid state reaction method

Sahu

Chandrakar

Baghel

et al. 2015

Journal of Alloys and Compounds

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“…Furthermore the oxygen vacancies are also present. All these vacancies present make up trap levels [29]. In SrAl 2 O 4 , the most probable centers which can be observed are the V centers (a hole trapped at a cation vacancy) and F centers (an electron trapped at an anion vacancy).When the sample is irradiated with UV radiation most of the excitation energy associated with the excited carriers (electrons or holes) will be transferred via the host directly to the luminescence centers of Dy 3?…”

Section: Thermoluminescence (Pl)mentioning

confidence: 97%

Luminescence studies of dysprosium doped strontium aluminate white light emitting phosphor by combustion route

Sahu

Bisen

Brahme

et al. 2015

J Mater Sci: Mater Electron

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In the present investigation dysprosium doped strontium aluminate phosphor was prepared by combustion synthesis method. The crystal structure of the prepared phosphor was consistent with standard monoclinic phase with a space group P2 1 . According to the TEM analysis, the particle size was found to be in the nanometer range. The trap parameters which are mainly activation energy (E), frequency factor (s) and order of the kinetics (b) were evaluated by using the peak shape method. Under the ultraviolet (365 nm) excitation, photoluminescence (PL) spectra showed characteristic emission bands at 480 (blue), 573 (yellow) and 670 nm (red) due to 4

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Structural characterization and optical properties of dysprosium doped strontium calcium magnesium di-silicate phosphor by solid state reaction method

Cited by 38 publications

References 41 publications

Enhanced luminescence performance of Sr2MgSi2O7:Eu2+ blue long persistence phosphor by co-doping with Ce3+ ions

Enhanced luminescence performance of Sr2MgSi2O7:Eu2+ blue long persistence phosphor by co-doping with Ce3+ ions

Luminescence properties of dysprosium doped calcium magnesium silicate phosphor by solid state reaction method

Luminescence studies of dysprosium doped strontium aluminate white light emitting phosphor by combustion route

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