Enhanced temperature sensing response of upconversion luminescence in ZnO–CaTiO3: Er3+/Yb3+ nano-composite phosphor

Tiwari, S.P.; Mahata, Manoj Kumar; Kumar, Kaushal; Rai, Vipin

doi:10.1016/j.saa.2015.05.081

Cited by 65 publications

(13 citation statements)

References 38 publications

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“…The optical temperature sensor, particularly based upon upconversion (UC) emissions of rare earth elements doped materials by the application of fluorescence intensity ratio technique among different emission lines, has garnered much attention . Many researchers have fixed their eyes on the use of rare earth ions doped in oxide hosts such as ZnO–CaTiO 3 , Y 2 O 3 , ZrO 2 , Gd 2 O 3 , and fluoride compounds . Meanwhile, the oxides with a BaTiO 3 perovskite structure are acknowledged as a dramatic kind of host matrices for rare earth ions as well, since they allow for a high rare earth ion doped concentration and lower phonon energy .…”

Section: Introductionmentioning

confidence: 99%

Effects of temperature and electric field on upconversion luminescence in Er³⁺‐Yb³⁺ codoped Ba_0.8Sr_0.2TiO₃ ferroelectric ceramics

et al. 2017

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Optical and electrical properties of 1%Er 3+ and different Yb 3+ content (1ExY) codoped Ba 0.8 Sr 0.2 TiO 3 (BST) ferroelectric ceramics fabricated by the solid-phase reaction were investigated. Under 980 nm pump condition, two green emission bands at 525 and 549 nm wavelength corresponding to, 2 H 11/2 ? 4 I 15/2 and 2 S 3/2 ? 4 I 15/2 transitions, and two red emission bands at 655 and 668 nm wavelength attributed to 4 F 9/2 ? 4 I 15/2 transition are observed. The temperature-sensing behaviors, calculated by the intensity ratio I 525 /I 549 suggested that, the maximum sensitivity of the green emission of the 1E8Y-BST ceramics is 1.07910 À2 K-1 at 293 K. Furthermore, the maximum sensitivity of 1E6Y-BST and 1E11Y-BST ceramics were obtained around the Curie temperature. The fluorescence lifetime of 1E8Y-BST ceramics for 2 H 11/2 level and 2 S 3/2 level shortened with the increase in the temperatures. Moreover, the upconversion (UC) luminescence intensity of 1E8Y-BST decreased with the increase in the external electric field and had a mutation at the coercive electric field (E c ) of about 1.24 kV/cm, which revealed that the electric field had influence on the UC luminescence. K E Y W O R D Sbarium titanate, Curie temperature, domains, ferroelectricity/ferroelectric materials

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Section: Introductionmentioning

confidence: 99%

Effects of temperature and electric field on upconversion luminescence in Er³⁺‐Yb³⁺ codoped Ba_0.8Sr_0.2TiO₃ ferroelectric ceramics

et al. 2017

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“…A behavior observed for all samples is that the emission in the green region is more intense than the emission in the red region. Furthermore, it is possible to observe that, increasing the concentration of Er 3 þ leads to an increase of emission attributed to the transition 4 A comparative UC emission spectrum between samples with different concentrations of Er 3þ was also performed. As can be seen in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Photoluminescent materials are typically composed by inorganic solids, consisting of a host matrix and small amounts of impurities intentionally added in order to give rise to the emission of radiation in specific regions of the electromagnetic spectrum. Among those impurities are the rare earth ions (RE 3 þ ) [1][2][3][4][5][6][7][8][9][10]. The photoluminescent properties of RE 3 þ come from the splitting of 4f levels assigned to the inter-electronic interactions, the spin-orbit coupling and the ligand field effect on these ions, when they are present in a host matrix [11].…”

Section: Introductionmentioning

confidence: 99%

Broadened band C-telecom and intense upconversion emission of Er3+/Yb3+ co-doped CaYAlO4 luminescent material obtained by an easy route

Perrella

Schiavon

Pécoraro

et al. 2016

Journal of Luminescence

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This work reports on photoluminescence properties of Er 3 þ /Yb 3 þ co-doped CaYAlO 4 in powder form, synthesized by an easy route using citric acid as ligand to form complex precursor. The 1.2 mol% of Yb 3 þ was fixed, while the amount of Er 3 þ changed in 0.5, 1.5 and 3 mol% in order to evaluate the photoluminescence properties as a function of the Er 3 þ concentration. The structural and thermal properties of the viscous solutions and powder materials obtained after the heat-treatment at 1000, 1100 and 1200°C for 4 h were evaluated by XRD, FTIR and TG/DTA analysis. The results showed the formation of pure CaYAlO 4 tetragonal crystalline phase after heat-treatment at 1100°C and 1200°C. Intense emission in the visible region under excitation at 980 nm was attributed to upconversion process, from Er 3 þ intraconfigurational f-f transitions. The emissions were assigned to the transitions 2 H 11/2-4 I 15/2 and 4 S 3/ 2-4 I 15/2 (green region), and 4 F 9/2-4 I 15/2 (red region) energy levels. The ratio between emission band integrated areas assigned to the red and green emissions increased as a function of Er 3 þ concentration. Under excitation at 980 nm with 100 mW of power pump, the materials also showed intense and broadening emission with maximum at 1520 nm with FWHM of 84.74 nm for the sample CaYAlO 4 :1.5% Er 3 þ /1.2% Yb 3 þ heat-treated at 1000°C for 4 h. The photoluminescence properties showed that these materials are promising for use in C-telecom band as optical amplifier biological marker or/and solidstate laser devices under excitation at 980 nm.

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“…Reports on luminescence properties show that high energy phosphor materials comprise oxygen‐based systems. There have been many reports on oxygen‐based UC materials, such as Y 2 O 3, [ 10 ] Bi 2 Ti 2 O 7, [ 11 ] CaTiO 3, [ 12 ] and Y 2 SiO 5, [ 13 ] however oxygen‐based phosphor material systems possess high photon energy in the host molecules due to stretching vibrations. By contrast, fluoride‐based phosphor material systems such as NaYF 4 , offer the advantage of a good host lattice with low photon energy, which results in minimization of quenching of the rare‐earth ion excited state.…”

Section: Introductionmentioning

confidence: 99%

Improvement of luminescence properties of NaYF₄:Yb³⁺/Er³⁺ upconversion materials by a cross‐relaxation mechanism based on co‐doped Ho³⁺ ion concentrations

2021

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NaYF4:Yb3+/Er3+/Ho3+ nanophosphors were successfully synthesized using a solvothermal method and with various concentrations of Ho3+ ions. The crystal structure, grain size, morphology, and luminescence properties were analyzed by X‐ray diffraction, field‐emission scanning electron microscopy, and photoluminescence measurements. All samples were crystallized as a cubic structure; it was confirmed that all samples exhibited strong green emission and weak red emission generated at a particular level of the activated ions. The strongest upconversion fluorescence intensity was observed in the Ho3+ and Er3+ ions co‐doped NaYF4 materials with a Ho3+ ion concentration of 0.005 mol. Only the green fluorescence intensity at the 542 nm centre increased strongly due to the 4S3/2→4I15/2 energy transfer. This increase in upconversion fluorescence intensity at a selected wavelength was described as a cross‐relaxation mechanism due to the addition of Ho3+ ions.

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Enhanced temperature sensing response of upconversion luminescence in ZnO–CaTiO3: Er3+/Yb3+ nano-composite phosphor

Cited by 65 publications

References 38 publications

Effects of temperature and electric field on upconversion luminescence in Er³⁺‐Yb³⁺ codoped Ba_0.8Sr_0.2TiO₃ ferroelectric ceramics

Effects of temperature and electric field on upconversion luminescence in Er³⁺‐Yb³⁺ codoped Ba_0.8Sr_0.2TiO₃ ferroelectric ceramics

Broadened band C-telecom and intense upconversion emission of Er3+/Yb3+ co-doped CaYAlO4 luminescent material obtained by an easy route

Improvement of luminescence properties of NaYF₄:Yb³⁺/Er³⁺ upconversion materials by a cross‐relaxation mechanism based on co‐doped Ho³⁺ ion concentrations

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Enhanced temperature sensing response of upconversion luminescence in ZnO–CaTiO3: Er3+/Yb3+ nano-composite phosphor

Cited by 65 publications

References 38 publications

Effects of temperature and electric field on upconversion luminescence in Er3+‐Yb3+ codoped Ba0.8Sr0.2TiO3 ferroelectric ceramics

Effects of temperature and electric field on upconversion luminescence in Er3+‐Yb3+ codoped Ba0.8Sr0.2TiO3 ferroelectric ceramics

Broadened band C-telecom and intense upconversion emission of Er3+/Yb3+ co-doped CaYAlO4 luminescent material obtained by an easy route

Improvement of luminescence properties of NaYF4:Yb3+/Er3+ upconversion materials by a cross‐relaxation mechanism based on co‐doped Ho3+ ion concentrations

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Effects of temperature and electric field on upconversion luminescence in Er³⁺‐Yb³⁺ codoped Ba_0.8Sr_0.2TiO₃ ferroelectric ceramics

Effects of temperature and electric field on upconversion luminescence in Er³⁺‐Yb³⁺ codoped Ba_0.8Sr_0.2TiO₃ ferroelectric ceramics

Improvement of luminescence properties of NaYF₄:Yb³⁺/Er³⁺ upconversion materials by a cross‐relaxation mechanism based on co‐doped Ho³⁺ ion concentrations