Luminescence and thermoluminescence properties of a red emitting phosphor, Sr4Al14O25:Eu3+

Emen, Fatih Mehmet; Altinkaya, R.; Kafadar, V. Emir; Avşar, Göktürk; Yeşilkaynak, Tuncay; Külcü, Nevzat

doi:10.1016/j.jallcom.2016.04.232

Cited by 28 publications

(12 citation statements)

References 36 publications

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“…However, each of these dosimeters is not suitable for all low or high radiation zones. Therefore, continuous efforts is being made by researchers worldwide to develop new materials and to improve the dosimetric properties of existing materials to be used as efficient TLD materials over a wide range of radiation doses …”

Section: Introductionmentioning

confidence: 99%

Versatility of thermoluminescence materials and radiation dosimetry – A review

et al. 2019

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Thermoluminescence (TL) materials exhibit a wide range of applications in different areas such as personal dosimetry, environmental dosimetry, medical research etc.Doping of different rare earth impurities in different hosts is responsible for changing the properties of materials useful for various applications in different fields. These materials can be irradiated by different types of beams such as γ-rays, X-rays, electrons, neutrons etc. Various radiation regimes, as well as their dose-response range, play an important role in thermoluminescence dosimetry. Several TL materials, such as glass, microcrystalline, nanostructured inorganic materials and recently developed materials, are reviewed and described in this article.

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Section: Introductionmentioning

confidence: 99%

Versatility of thermoluminescence materials and radiation dosimetry – A review

et al. 2019

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“…Usually, electric dipole transitions are affected by the variations in the chemical environment. The emission intensity of electric dipole is more prominent than that of a magnetic dipole, which discloses less symmetry around the Eu 3+ ions lacking an inversion centre [13]. The non-existence of symmetry centres causes mixing of 4 f orbital with the opposite parity orbitals resulting in the occurrence of electric dipole transitions [22].…”

Section: X-ray Photoelectron Spectroscopy (Xps)mentioning

confidence: 93%

“…Researchers prefer alkaline earth aluminates than sulphides as ideal host material due to their chemical stability [12]. RE metal ions, when doped in the strontium aluminate based host material, results in intense luminescence in the blue to the green region having superior stability, efficiency and afterglow [13]. Strontium aluminates doped with europium are capable of producing significant phosphorescence and emission in the visible region [12].…”

Section: Introductionmentioning

confidence: 99%

Effect of Sr on the luminescence properties of Eu³⁺ activated xZnO-(1-x) SrO-Al₂O₃ phosphors

Revupriya

Anjana

Gopakumar

et al. 2020

Mater. Res. Express

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Europium-doped xZnO-SrO-Al 2 O 3 (x = 0, 0.2, 0.4, 0.5, 0.6, 0.8, 1) phosphors were synthesized by the traditional Solid-State Reaction (SSR) method. The structure of the phosphors prepared was analysed with the x-ray diffraction technique. The xZnO-(1-x) SrO-Al 2 O 3 :Eu 3+ (0.1 mol%) (x = 0, 0.2, 0.4, 0.5, 0.6, 0.8, 1) exhibits varying PL intensity and is maximum for 0.8ZnO-0.2SrO-Al 2 O 3 : Eu 3+ (0.4 mol%) and hence treated as the most prominent phosphor among these combinations. In the photoluminescence spectrum of the phosphors prepared, a sequence of emission bands were visible at various wavelengths viz., 576, 586, 602, 620, 656 and 702 nm as a result of the transitions of Eu 3+ ions [ 5 D0 -7 Fj where (j = 0-4)] and an excitation spectrum at 620 nm. An efficient orange-red phosphor thus developed capable of yielding a quantum efficiency of about 12%. Studies revealed that the commercially available red phosphors having an efficiency of only 9.6% (λex = 394 nm) & 4.2% (λex = 395 nm). Hence the current sample could be an ideal alternative for an efficient phosphor near UV LEDs. The mechanoluminescence of the 0.8ZnO-0.2SrO-Al 2 O 3 : Eu 3+ (0.4 mol%) phosphor was also measured. The phosphor composition was analysed using XPS. The present paper also reports the thermoluminescence and OSL properties of Europium doped Zinc Strontium Aluminate phosphor at different gamma-ray dosages. Peak shape method was employed to evaluate kinetic parameters like activation energy, frequency factor and symmetry factor. OPEN ACCESS RECEIVED

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“…The aluminates have been extensively explored as hosts for phosphors due to their excellent optical properties [8,9]. In this paper, we report the red emitting phosphors Ba 2 Y 1-x Dy x AlO 5 (x = 0.01-0.30) under NUV (Near Ultraviolet) excitation.…”

Section: Introductionmentioning

confidence: 96%

A novel UV pumped yellow-emitting phosphor Ba₂YAlO₅:Dy³⁺ for white light-emitting diodes

2019

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A series of novel Dy3+ activated aluminate Ba2Y1-xDyxAlO5 (x = 0.01–0.30) red-emitting phosphors were synthesized through a high-temperature solid-state route at 1380°C. The X-ray diffraction patterns revealed that the samples were well crystallized in the space group P21/c (No. 14). The spectrum analysis revealed that under UV light excitation, Ba2YAlO5:Dy3+ phosphor exhibited blue and yellow peaks corresponding to 4F9/2–6H15/2 transition and 4F9/2–6H13/2 transition, respectively. The optimum dopant concentration of Dy3+ ions is around 2 mol% and the critical transfer distance of Dy3+ is calculated as 29 Å. The concentration quenching mechanism between Dy3+ has been investigated. Results indicate that Ba2YAlO5:Dy3+ offers the excellent optical properties as a potential yellow-emitting phosphor candidate for n-UV LEDs.

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Luminescence and thermoluminescence properties of a red emitting phosphor, Sr4Al14O25:Eu3+

Cited by 28 publications

References 36 publications

Versatility of thermoluminescence materials and radiation dosimetry – A review

Versatility of thermoluminescence materials and radiation dosimetry – A review

Effect of Sr on the luminescence properties of Eu³⁺ activated xZnO-(1-x) SrO-Al₂O₃ phosphors

A novel UV pumped yellow-emitting phosphor Ba₂YAlO₅:Dy³⁺ for white light-emitting diodes

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Luminescence and thermoluminescence properties of a red emitting phosphor, Sr4Al14O25:Eu3+

Cited by 28 publications

References 36 publications

Versatility of thermoluminescence materials and radiation dosimetry – A review

Versatility of thermoluminescence materials and radiation dosimetry – A review

Effect of Sr on the luminescence properties of Eu3+ activated xZnO-(1-x) SrO-Al2O3 phosphors

A novel UV pumped yellow-emitting phosphor Ba2YAlO5:Dy3+ for white light-emitting diodes

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Product

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Effect of Sr on the luminescence properties of Eu³⁺ activated xZnO-(1-x) SrO-Al₂O₃ phosphors

A novel UV pumped yellow-emitting phosphor Ba₂YAlO₅:Dy³⁺ for white light-emitting diodes