RETRACTED ARTICLE: Optical properties of rare earth-doped barium aluminate synthesized by different methods-A Review

Kaur, Jaspreet; Jaykumar, Beena; Dubey, Vikas; Shrivastava, Ravi; Suryanarayana, N. S.

doi:10.1007/s11164-013-1349-z

Cited by 19 publications

(16 citation statements)

References 47 publications

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“…Barium aluminate (BaAl 2 O 4 ) has a stuffed tridymite structure that is derived from the SiO 2 β-tridymite structure observed in other alkaline earth aluminates [ 96 ]. It has a hexagonal phase, which is different from those of strontium aluminate and calcium aluminate.…”

Section: Barium Aluminatesmentioning

confidence: 99%

Recent Developments in Lanthanide-Doped Alkaline Earth Aluminate Phosphors with Enhanced and Long-Persistent Luminescence

Kim

2021

Nanomaterials

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Lanthanide-activated alkaline earth aluminate phosphors are excellent luminescent materials that are designed to overcome the limitations of conventional sulfide-based phosphors. The increasing research attention on these phosphors over the past decade has led to a drastic improvement in their phosphorescence efficiencies and resulted in a wide variety of phosphorescence colors, which can facilitate applications in various areas. This review article discusses the development of lanthanide-activated alkaline earth aluminate phosphors with a focus on the various synthesis methods, persistent luminescence mechanisms, activator and coactivator effects, and the effects of compositions. Particular attention has been devoted to alkaline earth aluminate phosphors that are extensively used, such as strontium-, calcium-, and barium-based aluminates. The role of lanthanide ions as activators and coactivators in phosphorescence emissions was also emphasized. Finally, we address recent techniques involving nanomaterial engineering that have also produced lanthanide-activated alkaline earth aluminate phosphors with long-persistent luminescence.

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Section: Barium Aluminatesmentioning

confidence: 99%

Recent Developments in Lanthanide-Doped Alkaline Earth Aluminate Phosphors with Enhanced and Long-Persistent Luminescence

Kim

2021

Nanomaterials

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“…The ferroelectric-paraelectric transition in pure BaAl 2 O 4 was described earlier by various workers [8][9][10][11] based on X-ray diffraction (XRD), electron diffraction (ED) studies and analyses of the infrared spectrum. From these studies it was concluded that the ferroelectric-paraelectric phase transition in BaAl 2 O 4 takes place between 400 and 450 K. In view of the extended investigations on the afterglow behaviour of BaAl 2 O 4 :Eu 2+ co-doped with Dy 3+ (see for example [12]), it is surprising that to date no study of the spectroscopic characteristics of this phase transition has been published.…”

Section: Introductionmentioning

confidence: 99%

Photoluminescence and cathodoluminescence of BaAl₂O₄:Eu²⁺ and undoped BaAl₂O₄: evidence for F-centres

Engelsen¹,

Fern²,

Ireland³

et al. 2020

Opt. Mater. Express

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In this article the photoluminescence (PL) and cathodoluminescence (CL) of undoped BaAl 2 O 4 and BaAl 2 O 4 doped with 500 ppm and 3 mol% Eu 2+ is described. The most important results from the CL measurements are: (1) Undoped BaAl 2 O 4 manifested intrinsic CL at 460 nm, which increased at low temperature and did not change significantly upon exposure to the e-beam; (2) Doping BaAl 2 O 4 with Eu 2+ changed the character of the intrinsic luminescence band: it became more sensitive to temperature variations and the band experienced a blue shift to ∼425 nm; (3) electron beam (e-beam) exposure of Ba 0.97 Eu 0.03 Al 2 O 4 at low temperature increased the 425 nm band strongly while the Eu 2+ emission at ∼500 nm decreased by about 70%. The Eu 2+ emission band was symmetric, indicating that BaAl 2 O 4 :Eu has changed to the P6 3 22 phase upon e-beam exposure at low temperature; (4) We have identified the 460 nm band in undoped BaAl 2 O 4 and the 425 nm band in BaAl 2 O 4 :Eu 2+ with F-centre luminescence, corresponding to the F-centre emission in α-Al 2 O 3. The evidence for the assignment of the 425 nm band in BaAl 2 O 4 :Eu 2+ is the spectacular increase of the spectral radiance at 425 nm by e-beam exposure at 200 keV and low temperature. A preliminary model is presented that explains the results. The PL from BaAl 2 O 4 :Eu 2+ quenched at the rather low temperature of 140°C; this observation is explained in terms of thermal ionization of the Eu 2+ ion.

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“…Among various LPLMs, alkaline-earth aluminates are one of the most important types because of their high photoluminescence efficiency, long lasting time, and great chemical stability [4,5]. In alkaline-earth aluminates, europium dopant is widely used as a luminescence center, and its emission wavelength strongly depends on the host lattice.…”

Section: Introductionmentioning

confidence: 99%

Effects of boric acid on structural and luminescent properties of BaAl2O4:(Eu2+, Dy3+) phosphors

Mao

Qianmin

et al. 2016

Res Chem Intermed

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RETRACTED ARTICLE: Optical properties of rare earth-doped barium aluminate synthesized by different methods-A Review

Cited by 19 publications

References 47 publications

Recent Developments in Lanthanide-Doped Alkaline Earth Aluminate Phosphors with Enhanced and Long-Persistent Luminescence

Recent Developments in Lanthanide-Doped Alkaline Earth Aluminate Phosphors with Enhanced and Long-Persistent Luminescence

Photoluminescence and cathodoluminescence of BaAl₂O₄:Eu²⁺ and undoped BaAl₂O₄: evidence for F-centres

Effects of boric acid on structural and luminescent properties of BaAl2O4:(Eu2+, Dy3+) phosphors

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RETRACTED ARTICLE: Optical properties of rare earth-doped barium aluminate synthesized by different methods-A Review

Cited by 19 publications

References 47 publications

Recent Developments in Lanthanide-Doped Alkaline Earth Aluminate Phosphors with Enhanced and Long-Persistent Luminescence

Recent Developments in Lanthanide-Doped Alkaline Earth Aluminate Phosphors with Enhanced and Long-Persistent Luminescence

Photoluminescence and cathodoluminescence of BaAl2O4:Eu2+ and undoped BaAl2O4: evidence for F-centres

Effects of boric acid on structural and luminescent properties of BaAl2O4:(Eu2+, Dy3+) phosphors

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Photoluminescence and cathodoluminescence of BaAl₂O₄:Eu²⁺ and undoped BaAl₂O₄: evidence for F-centres