Tunable green to red ZrO<sub>2</sub>:Er nanophosphors

Soares, M.R.; Holz, T.; Oliveira, F.J.; Costa, F.M.; Monteiro, T.

doi:10.1039/c5ra00189g

Cited by 25 publications

(13 citation statements)

References 68 publications

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“…The identified lines in the green spectral region correspond to the sharp intraionic emission lines from the excited 2 H 11/2 , 4 S 3/2 multiplets to the 4 I 15/2 ground state of the Er 3+ in the YSZ host. The spectral shape and peak position of the identified lines are similar to those recently reported for the ZrO 2 :Er nanoparticles 17 . With the used doping contents, the luminescence of the tetragonal YSZ:Er,Yb results in an intense green visual appearance with naked eye at RT, as shown in Figure 6 (right).…”

Section: Ysz:eryb Synthesized By Plalsupporting

confidence: 79%

“…The PLAL technique was used to produced YSZ nanoparticles co-doped with Er 3+ and Yb 3+ ions (YSZ:Er,Yb), using the previously reported procedure 17 . The nanoparticles were produced through the ablation of a ceramic target, placed in the bottom of a cell immersed in deionized water, under irradiation of a nanosecond Q-switched pulsed Nd:YAG laser with 1064 nm wavelength.…”

Section: -Introductionmentioning

confidence: 99%

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Defect luminescence in oxides nanocrystals grown by laser assisted techniques

et al. 2015

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Wide band gap oxides, such as ZnO, SnO 2 and ZrO 2 , are functional materials with a wide range of applications in several important technological areas such as those including lighting, transparent electronics, sensors, catalysis and biolabeling. Recently, doping and co-doping of oxides with lanthanides have attracted a strong interest for lighting purposes, especially among them nanophosphors for bioassays. Tailoring the crystalline materials physical properties for such applications often requires a well-controlled incorporation of dopants in the material lattice and a comprehensive understanding of their role in the oxides matrices. These undoped or intentionally doped oxides have band gap energies exceeding 3.3 eV at room temperature and are known to exhibit optically active centers that span from the ultraviolet to the near infrared region. Typically, by using photon energy excitation above the materials band gap, high quality undoped materials display narrow emission lines near the band edge due to free and bound-exciton recombination, as well as shallow donor-acceptor recombination pairs. Additionally, broad emission bands are often observed in these wide band gap hosts, hampering some of the desired physical properties for further applications. Recognizing and understanding the role of the dopant-related defects when deliberately introduced in the oxide hosts, as well as their influence on the samples luminescence properties, constitutes a matter of exploitation by the scientific community worldwide. In this work, we investigate the luminescence properties of undoped and lanthanide doped oxide materials grown by laser assisted techniques. Laser assisted flow deposition (LAFD) and pulse laser ablation in liquids (PLAL) were used for the growth of ZnO, SnO 2 and yttria stabilized ZrO 2 (YSZ) micro and nanocrystals with different morphologies, respectively. Regarding the YSZ host, trivalent lanthanide ions were optically activated by in-situ doping and co-doping. The influence of the defect energy states on the optical properties of the different undoped and doped metal oxide hosts is investigated under ultraviolet and infrared excitation by means of photoluminescence and photoluminescence excitation.

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Section: Ysz:eryb Synthesized By Plalsupporting

confidence: 79%

Section: -Introductionmentioning

confidence: 99%

Defect luminescence in oxides nanocrystals grown by laser assisted techniques

et al. 2015

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“…This causes a reduction in PL emission intensity at higher fluence in the green region. The prompt intensity of Er 3+ ions is dependent on concentration of Er 3+ ions and consequently on the crystalline phase [6]. Green emission dominates in monoclinic phase of ZrO 2 (<5 mol% of Er 3+ ions) whereas tetragonal phase of ZrO 2 (>5 mol% of Er 3+ ions) show intense emission in the red region.…”

Section: Down-conversion Pl Under Excitation At 379 Nmmentioning

confidence: 99%

“…The intensity and color of emission of PL of ZrO 2 :Er 3+ is influenced by the concentration of Er 3+ . The PL is green in color for low concentration of Er 3+ and red when the concentration of Er 3+ ions is greater (>4 mol%) [6].…”

Section: Introductionmentioning

confidence: 99%

“…This is because of its excellent chemical and thermal stability, low phonon frequency (∼470 cm −1 ) & wide optical band/energy gap [1][2][3]. In recent years, a variety of synthesis methods have been developed to produce nanocrystalline zirconia with various morphologies that can be exploited for use in devices including optoelectronic, photonic, displays [4][5][6]. The f-f transitions of trivalent rare earth (RE) ions produce sharp lines in absorption spectrum as well as emission spectrum.…”

Section: Introductionmentioning

confidence: 99%

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Down and upconversion photoluminescence of ZrO₂:Er³⁺ phosphor irradiated with 120 MeV gold ions

Lokesha

Nagabhushana

Chithambo

et al. 2020

Mater. Res. Express

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Down conversion and upconversion photoluminescence of pristine and gold ion irradiated ZrO 2 :Er 3+ phosphor synthesized by solution combustion are reported. The crystallinity of the sample as analysed by x-ray diffraction shows a monoclinic phase having a crystallite size of about 57 nm calculated using Williamson-Hall formula. Field emission scanning electron microscopy shows that the shape and size of phosphor grains are non uniform. The down conversion photoluminescence of ZrO 2 :Er 3+ has sharp emission bands in the red, green and blue regions of the spectrum. These emissions are corresponding to f-f transitions of Er 3+ ions under excitation of 379 nm. In particular, the emission has maxima at 467, 492, 526, 548 and 660 nm correspond to 4 F 3/2 → 4 I 15/2 , 4 F 7/2 → 4 I 15/2 , 2 H 11/2 → 4 I 15/2 , 4 S 3/2 → 4 I 15/2 and 4 F 9/2 → 4 I 15/2 transitions respectively. Interestingly, the PL emission intensity (excitation at 379 nm) is enhanced 1.6 times higher than pristine sample after 120 MeV Au ion irradiation for a fluence of 1×10 10 ions cm −2 . The blue to green emission ratio increases with the increase in ion fluence. Therefore, emission of the color shift towards bluish-white color with ion fluence. The lifetime of 4 S 3/2 level is found to be 16.9 and 71.5 μs for pristine and Au ion irradiated (1×10 12 ions cm −2 ) ZrO 2 :Er 3+ respectively. In near infrared (NIR) region, the PL emission band is observed at 1531 nm corresponding to 4 I 13/2 → 4 I 15/2 transition of Er 3+ under excitation of 980 nm. The sample emits intense green emission and relatively weak red emission in up conversion PL under excitation of 980 nm. The ratio of intensities of red and green emission changes after Au ion irradiation is attributed to the corresponding change in the lattice symmetry in the host. Resulting in strong up conversion emission from two photon absorption process.

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Down‐conversion Photoluminescence Properties of ZrO ₂ : Ln ³⁺ (Ln = Eu, Sm, Er, Tb, Ho, Tm, Pr, Gd, Dy) Films Formed by Plasma Electrolytic Oxidation

Ćirić¹,

Stojadinović²

2022

Nanotechnology in Electronics

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Tunable green to red ZrO₂:Er nanophosphors

Abstract: Pulsed laser ablation in water was validated as an effective method to produced erbium-doped ZrO2 nanoparticles with intense up-conversion luminescence.

Cited by 25 publications

References 68 publications

Defect luminescence in oxides nanocrystals grown by laser assisted techniques

Defect luminescence in oxides nanocrystals grown by laser assisted techniques

Down and upconversion photoluminescence of ZrO₂:Er³⁺ phosphor irradiated with 120 MeV gold ions

Down‐conversion Photoluminescence Properties of ZrO ₂ : Ln ³⁺ (Ln = Eu, Sm, Er, Tb, Ho, Tm, Pr, Gd, Dy) Films Formed by Plasma Electrolytic Oxidation

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Tunable green to red ZrO2:Er nanophosphors

Abstract: Pulsed laser ablation in water was validated as an effective method to produced erbium-doped ZrO2 nanoparticles with intense up-conversion luminescence.

Cited by 25 publications

References 68 publications

Defect luminescence in oxides nanocrystals grown by laser assisted techniques

Defect luminescence in oxides nanocrystals grown by laser assisted techniques

Down and upconversion photoluminescence of ZrO2:Er3+ phosphor irradiated with 120 MeV gold ions

Down‐conversion Photoluminescence Properties of ZrO 2 : Ln 3+ (Ln = Eu, Sm, Er, Tb, Ho, Tm, Pr, Gd, Dy) Films Formed by Plasma Electrolytic Oxidation

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Product

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About

Tunable green to red ZrO₂:Er nanophosphors

Down and upconversion photoluminescence of ZrO₂:Er³⁺ phosphor irradiated with 120 MeV gold ions

Down‐conversion Photoluminescence Properties of ZrO ₂ : Ln ³⁺ (Ln = Eu, Sm, Er, Tb, Ho, Tm, Pr, Gd, Dy) Films Formed by Plasma Electrolytic Oxidation