Red shift and higher photoluminescence emission of CCTO thin films undergoing pressure treatment

Sequinel, Thiago; García, Iván; Tebcherani, S. M.; Kubaski, Evaldo Toniolo; Oliveira, L.; Li, Máximo Siu; Longo, Elson; Varela, José Arana

doi:10.1016/j.jallcom.2013.08.210

Cited by 14 publications

(12 citation statements)

References 22 publications

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“…Along with the development of novel complex perovskite oxide materials, a large number of synthetic strategies have recently been developed to produce CTO materials of different sizes and morphologies [8][9][10][11][12][13][14][15]. In this context, it is well known that the polymeric precursor method is a simple, clean, and efficient approach to fabricate complex functional materials.…”

Section: Introductionmentioning

confidence: 99%

Influence of Cu-doping on the structural and optical properties of CaTiO3 powders

Oliveira

Moura

Porta

et al. 2016

Materials Research Bulletin

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A B S T R A C THere, we report on the effect of chemical substitution on the structural and optical properties of Cudoped CaTiO 3 (CTO) polycrystalline powders synthesized by the polymeric precursor method. Our findings are discussed based on the structural order-disorder effects originating from the modification of the Ca 1Àx Cu x TiO 3 microcrystal matrix. These results may elucidate the compositional modulation and methods of controlling the structural design, as well as reveal the changes in the optical behavior of this system at an atomic level.

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Section: Introductionmentioning

confidence: 99%

Influence of Cu-doping on the structural and optical properties of CaTiO3 powders

Oliveira

Moura

Porta

et al. 2016

Materials Research Bulletin

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“…The PL response is being studied by different researchers, due to the applicability in optics devices. This has already been reported in different materials with a perovskite structure [21][22][23][24][25][26], among them the CTO [27] CCTO [22,[28][29][30][31] and CCTO/CTO [32]. Usually, the PL behavior is attributed to multiphonon processes, i.e., a system in which relaxation occurs through several paths located in states of energy above the valence band and below the conduction band [33].…”

Section: Introductionmentioning

confidence: 75%

“…clusters (where o-order and ddisorder) in the structure [24,31]. It is known in the literature that the photoluminescence emission in the blue region is related to TiO…”

Section: Photoluminescent Spectroscopymentioning

confidence: 99%

Photoluminescence behavior on Sr 2+ modified CaCu 3 Ti 4 O 12 based ceramics

Orrego

Cortés

Amoresi

et al. 2018

Ceramics International

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Sr 2+ modified CaSr x Cu 3-x Ti 4 O 12 ceramic powders with x = ranging from 0.00 to 3.00 were prepared by solidstate reaction. The effects of Sr 2+ CCTO powders were evaluated by X-ray diffraction (XRD) with Rietveld refinement revealing a mixture of multiple phases. The Raman spectroscopy analysis pointed out that Sr 2+ addition produces an emission in the blue region, associated to TiO 6 clusters. Optical properties by means of PL analysis showed emission near to blue region for the samples with x = 0.00, x = 0.15, x = 0.30, corresponding to oxygen vacancies. The emission in the violet region is associated to deep defects while emission in the other samples is linked to shallow defects typical of disordered crystalline structures. Less prominent emission in the green region with the increase of Sr 2+ corresponds to less self-trapped charges, less interaction between electron and hole, and donor-acceptor recombination.

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“…These emissions band of Pr 3+ ions suggested the effective energy transfer from the absorption at 553 nm. The photoluminescence mechanism of TiO 2 ceramics is different from CCTO, whose photoluminescence mechanism originates from pressure . Figure (b) shows the calculated CIE chromaticity coordinates of 0.50 mol% Pr 6 O 11 ‐doped TiO 2 varistor ceramics based on its emission spectrum.…”

Section: Resultsmentioning

confidence: 99%

“…The photoluminescence mechanism of TiO 2 ceramics is different from CCTO, whose photoluminescence mechanism originates from pressure. 44 Figure 9 (b) shows the calculated CIE chromaticity coordinates of 0.50 mol% Pr 6 O 11 -doped TiO 2 varistor ceramics based on its emission spectrum. The CIE color coordinates for photoluminescence emission at 553 nm excitation wavelength is (0.6763, 0.3235).…”

Section: September 2016mentioning

confidence: 99%

Varistor, Dielectric, and Luminescent Properties of Pr₆O₁₁‐doped TiO₂ Multifunctional Ceramics

Gong

Chu

et al. 2016

J. Am. Ceram. Soc.

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A series of Pr 6 O 11 (x = 0-0.70 mol%)-doped TiO 2 ceramics were synthesized by the conventional solid-state reaction method. The microstructure, electrical, and luminescence properties were systematically investigated. The results showed that the as-prepared TiO 2 ceramics exhibited strong red emission at 606 nm at room temperature and the optimal photoluminescence were obtained at x = 0.30. In addition, the nonlinear coefficient was improved with the amount of Pr 6 O 11 dopant, reaching the maximum value at x = 0.50. Therefore, Pr 6 O 11 -doped TiO 2 ceramics, which simultaneously exhibited luminescent properties and good electrical properties, would be useful in novel multifunctional devices.

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Red shift and higher photoluminescence emission of CCTO thin films undergoing pressure treatment

Cited by 14 publications

References 22 publications

Influence of Cu-doping on the structural and optical properties of CaTiO3 powders

Influence of Cu-doping on the structural and optical properties of CaTiO3 powders

Photoluminescence behavior on Sr 2+ modified CaCu 3 Ti 4 O 12 based ceramics

Varistor, Dielectric, and Luminescent Properties of Pr₆O₁₁‐doped TiO₂ Multifunctional Ceramics

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Red shift and higher photoluminescence emission of CCTO thin films undergoing pressure treatment

Cited by 14 publications

References 22 publications

Influence of Cu-doping on the structural and optical properties of CaTiO3 powders

Influence of Cu-doping on the structural and optical properties of CaTiO3 powders

Photoluminescence behavior on Sr 2+ modified CaCu 3 Ti 4 O 12 based ceramics

Varistor, Dielectric, and Luminescent Properties of Pr6O11‐doped TiO2 Multifunctional Ceramics

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Varistor, Dielectric, and Luminescent Properties of Pr₆O₁₁‐doped TiO₂ Multifunctional Ceramics