Review of the synthesis, characterization, and properties of LaAlO3 phosphors

Kaur, Jaspreet; Singh, Deepti; Dubey, Vikas; Suryanarayana, N. S.; Parganiha, Yogita; Jha, Pooja

doi:10.1007/s11164-013-1126-z

Cited by 36 publications

(14 citation statements)

References 68 publications

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“…3) arising from the charge transfer band (CTB) between Eu 3+ and the neighboring O 2-and a group of lines in the longer wavelength region due to the f-f transitions within Eu 3+ 4f 6 configuration. The prominent excitation band observed at 336 nm (UV) due to the transition of Eu 3+ ( 7 F 0 → 5 D 4 ) and this clearly indicates that CaZrO 3 :Eu 3+ phosphors are effectively excited by ultraviolet light emitting diodes (UV-LEDs) [23][24][25][26].…”

Section: Sem Resultsmentioning

confidence: 98%

“…Generally, the emission spectrum of CaZrO 3 :Eu 3+ consists of two sharp lines at 593, 613 nm, which are associated with the transitions from the excited 5 D 0 level to 7 F J (J 1/4 = 1, 2) levels of Eu 3+ ions [26]. It is reported that the red emission (R) at 613 nm from the 5 D 0 -7 F 2 transition is a typical electric-dipole transition, whereas the orange emission (O) at 593 nm from the 5 D 0 -7 F 1 transition is a typical magnetic-dipole transition.…”

Section: Photoluminescence Studymentioning

confidence: 99%

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Optical studies of Eu3+ doped CaZrO3 phosphor for display device applications

Tiwari

Kuraria

2015

Optik

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Section: Sem Resultsmentioning

confidence: 98%

Section: Photoluminescence Studymentioning

confidence: 99%

Optical studies of Eu3+ doped CaZrO3 phosphor for display device applications

Tiwari

Kuraria

2015

Optik

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“…The width of the peak increases as the size of the crystallite decreases. The size of the crystals has been computed from the full width half maximum (FWHM) of the intense peak using Scherer formula [30][31][32][33][34]. Crystallite size of sample in the range 58 nm is found.…”

Section: Resultsmentioning

confidence: 99%

Mechanoluminescence Study of Europium Doped CaZrO3 Phosphor

Tiwari¹,

Dubey

Kuraria³

2016

J Fluoresc

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Behaviour displayed by mechanoluminescence (ML) in CaZrO3:Eu(3+) doped phosphors with variable concentration of europium ions are described. When the ML is excited impulsively by the impact of a load on the phosphors the ML intensity increases with time, attains a maximum value and then it decreases. In the ML intensity versus time curve, the peak increases and shifts towards shorter time values with increasing impact velocities. Sample was synthesized by combustion synthesis method with variable concentration of Eu(3+) ions (0.1, 0.2, 0.5, 1, 1.5 mol%) and characterized by X-ray diffraction technique. The total ML intensity IT is defined as the area below the ML intensity versus time curve. Initially IT increases with impact velocity V0 of the load and then it attains a saturation value for higher values of impact velocities which follow the relation IT = IT (0) exp.(-Vc/V0) where IT (0) and Vc are constants. Total ML intensity increases linearly with the mass of the phosphors for higher impact velocities. The ML intensity Im, corresponding to the peak of ML intensity versus time curve increases linearly with the impact velocities. The time tm, is found to be linearly related to 1000/V0. The mechanoluminescence induced by impulsive excitation in europium doped CaZrO3 phosphors plays a significance role in the understanding of biological sensors and display device application.

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“…After being ground thoroughly, the powder was placed in an alumina crucible and fired in a muffle furnace at 1000 C for 1 h for calcinations and at 1250 C for 3 h for sintering. Every heating is followed by intermediate grinding [34,35].…”

Section: Methodsmentioning

confidence: 99%