Down conversion luminescence behavior of Er and Yb doped Y2O3 phosphor

Agrawal, Sadhana; Dubey, Vikas

doi:10.1016/j.jrras.2014.09.014

Cited by 23 publications

(8 citation statements)

References 31 publications

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“…This reduces the likelihood of cross-relaxation between ions, reduces energy loss, and improves the light conversion ability of the UCNPs. 54–56 However, when the amount of doped Yb 3+ is too high, Yb 3+ and Tm 3+ in the crystal lattice become close to each other and interact strongly with each other, resulting in a short lifetime of Yb 3+ ions at the excited-state energy level. In addition, too much Yb 3+ will generate ion pairs or clusters, decreasing the number of ions that play a sensitizing role and reducing the light conversion ability.…”

Section: Resultsmentioning

confidence: 99%

Y₂O₃:Yb³⁺, Tm³⁺/ZnO composite with a heterojunction structure and upconversion function for the photocatalytic degradation of organic dyes

et al. 2021

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Section: Resultsmentioning

confidence: 99%

Y₂O₃:Yb³⁺, Tm³⁺/ZnO composite with a heterojunction structure and upconversion function for the photocatalytic degradation of organic dyes

et al. 2021

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“…The colour coordinates for the Er 3+ -doped sample are u′ = 0.228 and v′ = 0.061 (these coordinates are very near to the blue light emission). Hence, this phosphor has excellent colour tenability from blue light emission (25)(26)(27).…”

Section: Cie Coordinatementioning

confidence: 99%

Infrared and visible emissions of rare‐earth‐doped CeO₂ phosphor

Chandrakar¹,

Kaur²,

Dubey³

et al. 2015

Luminescence

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This paper reports the synthesis and characterization of Er(3+)-doped CeO2 phosphor with variable concentrations of erbium. The sample was synthesized using a solid-state reaction method, which is useful for the large-scale production of phosphors and is also eco-friendly. The prepared sample was characterized using an X-ray diffraction (XRD) technique. The XRD pattern confirmed that sample has the pure cubic fluorite crystal structure of CeO2. The crystallite size of the prepared phosphor was determined by Scherer's formula and the crystallite size giving an intense XRD peak is 40.06 nm. The surface morphology of the phosphor was determined by field emission gun scanning electron microscopy (FEGSEM). From the FEGSEM image, good surface morphology with some agglomerates was found. The functional group in the prepared sample was analysed by Fourier transform infrared (FTIR) spectroscopy. All samples prepared with variable concentrations of Er(3+) (0.1-2 mol%) were studied by photoluminescence analysis and it was found that the excitation spectra of the prepared phosphor shows broad excitation centred at 251 nm. Emission spectra at different concentrations of Er(3+) show strong peaks at 413 and 470 nm and a weaker peak at 594 nm. The dominant peaks at 413 and 470 nm are caused by the allowed electronic transition (4)S3/2 → (4)I15/2 and the weaker transition at 594 nm is due to the transition (4)F9/2 → (4)I15/2. Spectrophotometric determinations of peaks were evaluated using the Commission Internationale de I'Eclairage (CIE) technique. The emission spectra were also observed using an infrared (IR) laser 980 nm source, and three distinct peaks were found in the IR region at 848, 870 and 980 nm. The prepared phosphor has utility for application in display devices.

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“…Y 2 O 3 is a host material (matrix) and its wide band gap makes it attractive for several optical applications in the visible and UV ranges. Doping Y 2 O 3 with other rare earth elements can bring some advantages, since they can emit within its optical window and not suffer quenching effects [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

Tailoring Upconversion and Morphology of Yb/Eu Doped Y2O3 Nanostructures by Acid Composition Mediation

et al. 2019

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The present study reports the production of upconverter nanostructures composed by a yttrium oxide host matrix co-doped with ytterbium and europium, i.e., Y2O3:Yb3+/Eu3+. These nanostructures were formed through the dissociation of yttrium, ytterbium and europium oxides using acetic, hydrochloric and nitric acids, followed by a fast hydrothermal method assisted by microwave irradiation and subsequent calcination process. Structural characterization has been carried out by X-ray diffraction (XRD), scanning transmission electron microscopy (STEM) and scanning electron microscopy (SEM) both coupled with energy dispersive X-ray spectroscopy (EDS). The acid used for dissociation of the primary oxides played a crucial role on the morphology of the nanostructures. The acetic-based nanostructures resulted in nanosheets in the micrometer range, with thickness of around 50 nm, while hydrochloric and nitric resulted in sphere-shaped nanostructures. The produced nanostructures revealed a homogeneous distribution of the doping elements. The thermal behaviour of the materials has been investigated with in situ X-Ray diffraction and differential scanning calorimetry (DSC) experiments. Moreover, the optical band gaps of all materials were determined from diffuse reflectance spectroscopy, and their photoluminescence behaviour has been accessed showing significant differences depending on the acid used, which can directly influence their upconversion performance.

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Down conversion luminescence behavior of Er and Yb doped Y2O3 phosphor

Cited by 23 publications

References 31 publications

Y₂O₃:Yb³⁺, Tm³⁺/ZnO composite with a heterojunction structure and upconversion function for the photocatalytic degradation of organic dyes

Y₂O₃:Yb³⁺, Tm³⁺/ZnO composite with a heterojunction structure and upconversion function for the photocatalytic degradation of organic dyes

Infrared and visible emissions of rare‐earth‐doped CeO₂ phosphor

Tailoring Upconversion and Morphology of Yb/Eu Doped Y2O3 Nanostructures by Acid Composition Mediation

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Down conversion luminescence behavior of Er and Yb doped Y2O3 phosphor

Cited by 23 publications

References 31 publications

Y2O3:Yb3+, Tm3+/ZnO composite with a heterojunction structure and upconversion function for the photocatalytic degradation of organic dyes

Y2O3:Yb3+, Tm3+/ZnO composite with a heterojunction structure and upconversion function for the photocatalytic degradation of organic dyes

Infrared and visible emissions of rare‐earth‐doped CeO2 phosphor

Tailoring Upconversion and Morphology of Yb/Eu Doped Y2O3 Nanostructures by Acid Composition Mediation

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Y₂O₃:Yb³⁺, Tm³⁺/ZnO composite with a heterojunction structure and upconversion function for the photocatalytic degradation of organic dyes

Y₂O₃:Yb³⁺, Tm³⁺/ZnO composite with a heterojunction structure and upconversion function for the photocatalytic degradation of organic dyes

Infrared and visible emissions of rare‐earth‐doped CeO₂ phosphor