Visible upconversion in Er 3+ /Yb 3+  co-doped LaAlO 3  phosphors

An aluminate is a compound containing an oxyanion of aluminum. Many aluminates are found in nature. A large number of phosphors that are used in various applications, such as scintillation detectors, optical thermometry, longlasting phosphorescence, solid-state lighting, solid-state lasers, upconversion, bioimaging, and plasma display panels, are based on aluminate formulae. This review focuses on the synthesis and characteristics of such phosphors. The conventional as well as novel methods of synthesizing these phosphors are reviewed. The emphasis on commercially important aluminate phosphors is discussed.

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“…Among rare‐earth perovskites, GdAP:Yb,Er, [ 394 ] LaAP:Yb,Er, [ 395 ] YAP:Yb,Er, [ 396 ] YAP:Sm, etc. find mention.…”

Section: Aluminate Phosphors For Applicationsmentioning

confidence: 99%

“…The UC mechanism involves a two-photon process. [393] Among rare-earth perovskites, GdAP:Yb,Er, [394] LaAP:Yb, Er, [395] YAP:Yb,Er, [396] YAP:Sm, etc. find mention.…”

Section: Upconverting Aluminatesmentioning

confidence: 99%

Luminescent Materials Based on Aluminates: A Review

Revankar

Gedekar²,

Moharil

2022

Physica Status Solidi (a)

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“…Therefore, the Er 3+ –Yb 3+ co‐doped materials promise high conversion efficiency without strong coherent excitation sources. With the inherent advantages of large anti‐Stokes shifts and long excited‐state lifetimes, these Er 3+ –Yb 3+ co‐doped materials can be applied to many areas such as glass system, nanocrystals, silica matrices and oxyfluoride glass ceramic, etc …”

Section: Introductionmentioning

confidence: 99%

“…With the inherent advantages of large anti-Stokes shifts and long excited-state lifetimes, these Er 3+ -Yb 3+ co-doped materials can be applied to many areas such as glass system, nanocrystals, silica matrices and oxyfluoride glass ceramic, etc. [13][14][15][16][17][18][19] As important materials on optical field, rare earth molybdates have promising applications for their superior luminescence properties. Because of its nontoxicity, excellent stability, high oscillating strength and simple synthetic conditions, molybdenum has a huge commercial prospect.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and up‐conversion of Er³⁺ and Yb³⁺ Co‐doped LiY(MoO₄)₂@SiO₂ for optical thermometry applications

et al. 2019

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Non‐contact temperature sensors based on the fluorescence intensity ratio (FIR) have been widely investigated owing to their high sensitivity and reliable real‐time monitoring. Herein, the SiO2‐coated LiY(MoO4)2@SiO2:Er3+,Yb3+ phosphor was investigated as an optical thermometry material, which was synthesized using the conventional solid state reaction and coated by a facile wet chemical route. The effect of surface modification on FIR was systematically characterized by structural analyses and spectral measurements and the temperature‐dependent up‐conversion FIR was investigated from 303 to 603 K under a 980 nm laser excitation. The results showed that the FIR value was thermally stable and the SiO2 coating led to a higher FIR sensitivity as well as a higher saturation threshold. This work would pave a way to design interesting optical thermometry materials in up‐conversion phosphors with better properties.

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“…Recently, trivalent rare earth (RE 3+ ) ion‐doped nanophosphor materials have attracted the attention of researchers because of their applications in three‐dimensional display technologies, field emission displays, plasma display panels, optical communication, lasers, solar cells, infrared quantum counters, sensors and bio‐imaging . RE ions play a significant role as efficient luminescence centers in modern lighting displays, with different emission colors arising from 5d–4f or 4f–4f transitions.…”

Section: Introductionmentioning

confidence: 99%

Structural and luminescent studies of erbium‐doped CaZrO₃ green‐emitting nanophosphors

et al. 2017

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Erbium (Er) (0.5, 1.0 and 1.5 wt%)-doped CaZrO nanophosphors were synthesized by the sol-gel method using poly(vinyl alcohol) as the chelating agent. Their structural and photoluminescence properties were studied using X-ray diffraction (XRD), field emission scanning electron microscopy-energy dispersive spectroscopy (FESEM-EDS), transmission electron microscopy (TEM), photoluminescence and Fourier transform infrared spectroscopy (FTIR). The XRD patterns of the samples confirm that nanoscale crystallite sizes. Agglomeration of the samples was observed using field emission scanning electron microscopy images. Energy dispersive spectroscopy measurements confirmed the existence of Ca, Zr, O and Er in the samples. Average particle sizes for the samples were calculated from transmission electron microscopy images. FTIR spectra clearly show characteristic absorption bands related to the metal oxides, as well as some other organic molecules. The photoluminescence spectra show bands in the green region. The Commission International de l'Eclairage coordinates were calculated and found to be in green region.

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Visible upconversion in Er 3+ /Yb 3+ co-doped LaAlO 3 phosphors

Cited by 29 publications

References 30 publications

Luminescent Materials Based on Aluminates: A Review

Luminescent Materials Based on Aluminates: A Review

Synthesis and up‐conversion of Er³⁺ and Yb³⁺ Co‐doped LiY(MoO₄)₂@SiO₂ for optical thermometry applications

Structural and luminescent studies of erbium‐doped CaZrO₃ green‐emitting nanophosphors

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Visible upconversion in Er 3+ /Yb 3+ co-doped LaAlO 3 phosphors

Cited by 29 publications

References 30 publications

Luminescent Materials Based on Aluminates: A Review

Luminescent Materials Based on Aluminates: A Review

Synthesis and up‐conversion of Er3+ and Yb3+ Co‐doped LiY(MoO4)2@SiO2 for optical thermometry applications

Structural and luminescent studies of erbium‐doped CaZrO3 green‐emitting nanophosphors

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Product

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Synthesis and up‐conversion of Er³⁺ and Yb³⁺ Co‐doped LiY(MoO₄)₂@SiO₂ for optical thermometry applications

Structural and luminescent studies of erbium‐doped CaZrO₃ green‐emitting nanophosphors