Visible upconversion emission and non-radiative direct Yb3+ to Er3+ energy transfer processes in nanocrystalline ZrO2:Yb3+,Er3+

Dı́az-Torres, L.A.; Meza, O.; Solís, David; Salas, P.; Rosa, E. De la

doi:10.1016/j.optlaseng.2010.12.010

Cited by 25 publications

(14 citation statements)

References 25 publications

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“…This observation correlates with the results obtained for Er doped zirconia9 and also for Er and Yb doped zirconia, where the optimal concentration of Er and Yb was found to be 0.5 at % Er and 2 at % Yb1011.…”

Section: Resultssupporting

confidence: 91%

“…For samples annealed at 800 °C the most intense upconversion luminescence was observed in sample 05ErYN (0.5% Er, 1% Yb, 1.5% Nb) with the lowest Er content; when the Er concentration was increased, the upconversion luminescence intensity decreased. This observation correlates with the results obtained for Er doped zirconia 9 and also for Er and Yb doped zirconia, where the optimal concentration of Er and Yb was found to be 0.5 at % Er and 2 at % Yb 10 11 .…”

Section: Resultssupporting

confidence: 91%

See 1 more Smart Citation

Doped zirconia phase and luminescence dependence on the nature of charge compensation

Šmits

Olsteins

Zolotarjovs

et al. 2017

Sci Rep

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Zirconia is a relatively new material with many promising practical applications in medical imaging, biolabeling, sensors, and other fields. In this study we have investigated lanthanide and niobium doped zirconia by luminescence and XRD methods. It was proven that charge compensation in different zirconia phases determines the incorporation of intrinsic defects and activators. Thus, the structure of zirconia does not affect the Er luminescence directly; however, it strongly affects the defect distribution around lanthanide ions and the way in which activator ions are incorporated in the lattice. Our results demonstrate the correlation between the crystalline phase of zirconia and charge compensation, as well as the contribution of different nanocrystal grain sizes. In addition, our experimental results verify the theoretical studies of metastable (tetragonal, cubic) phase stabilization determined using only oxygen vacancies. Moreover, it was found that adding niobium drastically increases activator luminescence intensity, which makes Ln3+ doped zirconia even more attractive for various practical applications. Although this study was based on the luminescence of the Er ion, the phase stabilization, charge compensation, and luminescence properties described in our results are expected to be similar for other lanthanide elements. Our results suggest that the luminescence intensity of other oxide matrices where lanthanides incorporate in place of tetravalent cations could be increased by addition of Nb ions.

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Section: Resultssupporting

confidence: 91%

Section: Resultssupporting

confidence: 91%

Doped zirconia phase and luminescence dependence on the nature of charge compensation

Šmits

Olsteins

Zolotarjovs

et al. 2017

Sci Rep

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“…Norris et al described the important role of the crystal phase in the efficiency of transition metal doped semiconducting nanoparticles [21]. To date, many methods have been deployed to prepare ZrO 2 : Eu 3+ luminescent phosphors in the form of powders, thin films or colloidal solutions by sol-gel method [22], polyol method [2], co-precipitation method [23] etc. Traditionally solid-state method was used for the preparation of phosphor materials for Solid State Lightining (SSL) applications.…”

Section: Introductionmentioning

confidence: 99%

Combustion synthesized tetragonal ZrO2: Eu3+ nanophosphors: Structural and photoluminescence studies

Vidya¹,

Anantharaju²,

Nagabhushana

et al. 2015

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

129

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Novel crystalline tetragonal ZrO2: Eu(3+) phosphors were prepared by a facile and efficient low temperature solution combustion method at 400±10 °C using oxalyl dihydrazide (ODH) as fuel. The powder X-ray diffraction patterns and Rietveld confinement of as formed ZrO2: Eu(3+) (1-11 mol%) confirmed the presence of body centered tetragonal phase. The crystallite size estimated from Scherrer's and W-H plots was found to be in the range of 7-17 nm. These results were in good agreement with transmission electron microscopy studies. The calculated microstrain in most of the planes indicated the presence of tensile stress along various planes of the particles. The observed space group (P42/nmc) revealed the presence of cations in the 2b positions (0.75, 0.25, 0.25) and the anions in the 4d positions (0.25, 0.25, 0.45). The optical band gap energies estimated from Wood and Tauc's relation was found to be in the range 4.3-4.7 eV. Photoluminescence (PL) emission was recorded under 394 and 464 nm excitation shows an intense emission peak at 605 nm along with other emission peaks at 537, 592, 605 and 713 nm. These emission peaks were attributed to the transition of (5)D0→(7)FJ (J=0, 1, 2, 3) of Eu(3+) ions. The high ratio of Intensity of ((5)D0→(7)F2) and ((5)D0→(7)F1) infers that Eu(3+) occupies sites with a low symmetry and without an inversion center. CIE color coordinates indicated the red regions which could meet the needs of illumination devices.

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“…The n ¼2.1 observed for Zr/Er/Yb-4/1/1 crystal consists with the well known two-photon process to populate the 4 F 7/2 excited state of Er 3 þ ion [28]. The pump power dependences of Er-1 and Er/Yb-1/1 crystals under 980 nm excitation are not investigated here, since the detail studies have been discussed by several groups [29,30]. .…”

Section: Methodsmentioning

confidence: 99%

Growth of Zr codoped Er:LiNbO3 and Er/Yb:LiNbO3 single crystal

Qian

Wang

et al. 2012

Journal of Crystal Growth

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Visible upconversion emission and non-radiative direct Yb3+ to Er3+ energy transfer processes in nanocrystalline ZrO2:Yb3+,Er3+

Cited by 25 publications

References 25 publications

Doped zirconia phase and luminescence dependence on the nature of charge compensation

Doped zirconia phase and luminescence dependence on the nature of charge compensation

Combustion synthesized tetragonal ZrO2: Eu3+ nanophosphors: Structural and photoluminescence studies

Growth of Zr codoped Er:LiNbO3 and Er/Yb:LiNbO3 single crystal

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