Effect of doping concentration and annealing temperature on the luminescence of novel orange red emitting CePO4:Sm3+ nanocrystals

Sisira, S.; Jacob, Lija; Thomas, Kukku; Alexander, Dinu; Biju, P.R.; Unnikrishnan, N.V.

doi:10.1016/j.jlumin.2019.01.043

Cited by 13 publications

(5 citation statements)

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“…36 Additionally, the XPS spectrum shown in Figure 3d consisted of two bands, and their binding energies were approximately 1083.3 and 1109.3 eV, respectively, which were ascribed to Sm 3+ 3d 5/2 and Sm 3+ 3d 3/2 . 37 The XPS results further indirectly confirmed the successful synthesis of Sm 3+ -activated BiOF nanoparticles.…”

Section: Resultsmentioning

confidence: 57%

Enhanced Visible Light-Driven Photocatalytic Activities and Photoluminescence Characteristics of BiOF Nanoparticles Determined via Doping Engineering

Wang

Ran

et al. 2020

Inorg. Chem.

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We report a new type of highly efficient visible light-driven photocatalyst, Sm3+-activated BiOF nanoparticles, developed by a facile solid-state reaction technology. The corresponding phase compositions, morphological nature, and chemical states along with complementary theoretical calculation insights are investigated systematically. Upon 404 nm laser excitation, the photoluminescence performance of the synthesized nanoparticles is explored and the optimal properties are achieved in BiOF:xSm3+ (x = 0.07). The dipole–quadrupole interaction is attributed to the concentration quenching mechanism. Under visible light irradiation, the degradation of the RhB dye by utilizing the Sm3+-activated BiOF nanoparticles is studied. In comparison with the BiOF nanoparticles, the resultant compounds doped with Sm3+ ions demonstrate improved photocatalytic performance. Moreover, on the basis of density functional theory, the electronic structure of the BiOF impacted by Sm3+ ion doping is studied in detail by first-principles calculations, revealing the generation of an impurity energy level that is beneficial for enhancing the photocatalytic properties. Importantly, the h+ and •O2 – active species play a deterministic role in promoting the degradation of the RhB dye. Compared to commercial ZnO nanoparticles, the developed nanoparticles exhibit superior photocatalytic activities, further elaborating that the Sm3+-activated BiOF nanoparticles are poised to be one of most promising visible light-driven photocatalyst candidates.

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Section: Resultsmentioning

confidence: 57%

Enhanced Visible Light-Driven Photocatalytic Activities and Photoluminescence Characteristics of BiOF Nanoparticles Determined via Doping Engineering

Wang

Ran

et al. 2020

Inorg. Chem.

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“…An absorption band assigned to the 4f-5d transition of Ce 3+ with crystal field splitted peaks are observed [19]. The effect of Ce 4+ -O 2charge transfer transition is also there behind the broad peak at 333 nm [14]. According to our previous work, the presence of Ce 4+ that observed in the absorption spectra is arised only from incomplete bonding structure that observed near the crystal surface of CePO 4 nanocrystals and is not from the bulk.…”

Section: Uv-visible Absorption Studiesmentioning

confidence: 88%

“…According to our previous work, the presence of Ce 4+ that observed in the absorption spectra is arised only from incomplete bonding structure that observed near the crystal surface of CePO 4 nanocrystals and is not from the bulk. Annealing caused the reduction of concentration of surface Ce 4+ such that the intensity of peak at 333 nm is found to be decreased considerably on annealing of sample from 600 to 900˚C [14]. UV-Vis absorption spectrum of Ce 1-x PO 4 :Eu x 3+ nanocrystals.…”

Section: Uv-visible Absorption Studiesmentioning

confidence: 99%

“…A detailed synthesis method is presented in our previous work for the synthesis of Eu 3+ doped CePO 4 [14].The sample synthesized at 600˚C and 900˚C were chosen for the detailed study and were labeled as S1and S2 respectively.…”

Section: Synthesis and Characterization 21 Synthesismentioning

confidence: 99%

“…[12][13]. Intense red emitting samarium (Sm 3+ ) doped CePO 4 nanocrystals is also reported in which variation of Sm 3+ luminescence with doping concentration and annealing is investigated [14]. However, to the best of our knowledge photoluminescence investigations on Eu 3+ :CePO 4 nanocrystals are not reported yet.…”

Section: Introductionmentioning

confidence: 99%

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Novel Intense Red Emitting Eu³⁺ Doped CePO₄ Nanocrystals for Solid State Lighting Applications

Sisira

Mani

Punathil

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Novel red emitting europium doped Cerium phosphate nanocrystals were synthesized by microwave assisted sol gel method. X-ray powder diffraction analysis identified the monoclinic structure of synthesized samples. The morphology of the samples were found to beconstructed from elongated spheres and is explained with the help of TEM analysis. Intense orange red emission on excitation with Ce4+ - O2-charge transfer band is established by photoluminescence analysis. The effect of annealing on the efficiency of excitation with Ce4+ - O2-charge transfer band is demonstrated and is explained in association with the concentration of surface Ce4+. Chromaticity coordinates indicate good colour purity of the sample. All the results indicated that microwave assisted method is suitable for synthesizing red emitting CePO4:Eu phosphors and become a potential candidate for optoelectronic and biological applications.

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Spectral Investigation of Enhanced Orange Emission in Eu³⁺ Activated LaPO₄ Nanophosphors Through Codoping With Na⁺ and Bi³⁺ Ions

Aswathy R,

Linju Ann,

Issac

et al. 2024

Luminescence

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Lanthanum phosphate is a well‐known potential host for rare earth activators for phosphor‐converted white LED application. Na+ and Bi3+ codoped Eu3+ activated LaPO4 nanophosphor is successfully synthesized using citrate‐based hydrothermal method at ambient condition and confirmed by XRD, EDS and XPS analysis. The excitation spectra of the sample exhibit sharp f‐f characteristics peak of Eu3+ at 393 nm that is found to be the most dominant. The comparative photoluminescence studies of La1‐xPO4:xEu3+(x = 0.10), La1‐x‐y PO4:xEu3+, yNa+(x = 0.10, y = 0.05), and La1‐x‐y‐zPO4:xEu3+, yNa+, zBi3+ (x = 0.10, y = z = 0.05) reveal a progressive enhancement of the orange emission from Eu3+ as Na+ and (Na+, Bi3+) ions are incorporated into the LaPO4 matrix. The dominance of 5D0‐7F1 magnetic dipole transition contributing a major part of orange luminescence of the nanophosphors and the symmetric site occupancy of Eu3+ was justified from the observed trend of in the Judd–Ofelt intensity parameters. The CIE studies confirm the improvement in color purity of emission from 32.5% to 90.6% due to the presence of Na+ and Bi3+ions.

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Effect of doping concentration and annealing temperature on the luminescence of novel orange red emitting CePO4:Sm3+ nanocrystals

Cited by 13 publications

References 39 publications

Enhanced Visible Light-Driven Photocatalytic Activities and Photoluminescence Characteristics of BiOF Nanoparticles Determined via Doping Engineering

Enhanced Visible Light-Driven Photocatalytic Activities and Photoluminescence Characteristics of BiOF Nanoparticles Determined via Doping Engineering

Novel Intense Red Emitting Eu³⁺ Doped CePO₄ Nanocrystals for Solid State Lighting Applications

Spectral Investigation of Enhanced Orange Emission in Eu³⁺ Activated LaPO₄ Nanophosphors Through Codoping With Na⁺ and Bi³⁺ Ions

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Effect of doping concentration and annealing temperature on the luminescence of novel orange red emitting CePO4:Sm3+ nanocrystals

Cited by 13 publications

References 39 publications

Enhanced Visible Light-Driven Photocatalytic Activities and Photoluminescence Characteristics of BiOF Nanoparticles Determined via Doping Engineering

Enhanced Visible Light-Driven Photocatalytic Activities and Photoluminescence Characteristics of BiOF Nanoparticles Determined via Doping Engineering

Novel Intense Red Emitting Eu3+ Doped CePO4 Nanocrystals for Solid State Lighting Applications

Spectral Investigation of Enhanced Orange Emission in Eu3+ Activated LaPO4 Nanophosphors Through Codoping With Na+ and Bi3+ Ions

Contact Info

Product

Resources

About

Novel Intense Red Emitting Eu³⁺ Doped CePO₄ Nanocrystals for Solid State Lighting Applications

Spectral Investigation of Enhanced Orange Emission in Eu³⁺ Activated LaPO₄ Nanophosphors Through Codoping With Na⁺ and Bi³⁺ Ions