The electronic structure and optical properties of rutile TiO2 co-doped with nickel and cerium

Amraoui, Rabie; Doghmane, M.; Chettibi, S.; Laefer, Debra F.

doi:10.1016/j.cjph.2017.10.004

Cited by 15 publications

(3 citation statements)

References 25 publications

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“…However, most of today’s brightly colored and widely available inorganic pigments contain toxic heavy metal elements as the main component (e.g., CdS/CdSe, PbCrO 4 , Sb 2 O 5 ·2PbO) and their applications are severely restricted [ 7 ]. Therefore, the development of eco-friendly and cost-effective inorganic pigments has become a popular research topic in the area of pigments [ 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Insight into the Effect of Counterions on the Chromatic Properties of Cr-Doped Rutile TiO2-Based Pigments

Zhou

Zhang

Chen³

et al. 2022

Materials

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Rutile TiO2 pigments codoped with chromophore ion Cr3+ and various charge-balancing ions (i.e., counterions species of Sb, Nb, W and Mo) were prepared by a solid-phase reaction method. The effects of the counterions and calcination temperatures on the phase structure, color-rendering and spectroscopic properties, microstructure, and stability of the synthesized pigments were investigated in detail. The results showed that the introduction of 5–10% counterions improved the solubility of Cr3+ in the TiO2 lattice to form the single-phase rutile pigments calcined at 1100 °C for 2 h. The 10% Cr-doped pigment showed a dark brown color. Depending on the content and type of counterions, the color of the codoped pigments was tailored from yellow to reddish or yellowish-orange to black with different brightness and hue. The influence mechanism of counterions was ascribed to the lattice distortion and variation in the charge balance condition. It was found that the addition of Sb, Nb, or Mo resulted in a remarkable improvement in the NIR reflectance of pigments. The grain growth was inhibited with the codoping of Cr/Sb and Cr/Nb to achieve the nano-sized pigments. In addition, the prepared pigments exhibited good acid and alkali corrosion resistance as well as excellent stability and coloring performance in transparent ceramic glazes.

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Section: Introductionmentioning

confidence: 99%

Insight into the Effect of Counterions on the Chromatic Properties of Cr-Doped Rutile TiO2-Based Pigments

Zhou

Zhang

Chen³

et al. 2022

Materials

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“…Until recently, Ga ion implantation was used to achieve a narrower TiO 2 bandgap. [ 28 ] It has been experimentally shown that the carrier concentration in TiO 2 increases as a function of the implantation dose, this in turn has a strong effect on the refractive index of implanted TiO 2 . A higher concentration of impurities can make the configuration of the bandgap more stable and can improve the light absorption performance inducing a redshift (decreased bandgap).…”

Section: Introductionmentioning

confidence: 99%

“…[ 26 ] However, beyond a critical level of doping, further increases in the density of ion impurities do not have a significant impact on the bandgap and consequently the optical absorption does not change. [ 28,29 ] In principle, the permittivity (dielectric function) of hybrid materials is a complex function because of the polarizability of the dielectric/metal matrix. The electric permittivity describes how strongly an external electric field polarizes the charge carriers within a given material.…”

Section: Introductionmentioning

confidence: 99%

Bimodal Plasmonic Color Filters Enable Direct Optical Imaging of Ion Implantation in Thin Films

Sadatnajafi

Balaur

Abbey

2021

Adv Funct Materials

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Optical metamaterials offer precise control over the properties and interactions of light at the nanoscale, attracting interest in many new fields of research including chemical and molecular sensing, magnetic antennas, and photovoltaic elements. By utilizing the phenomenon of extraordinary optical transmission (EOT) plasmonic devices enable the detection of minute changes in the local, near‐surface, dielectric properties of materials, opening up a wide range of different applications. Characterization of the optoelectronic properties of ultra‐thin films is of paramount importance for a wide range of electronic applications including integrated circuit production. However, it is often extremely difficult to achieve using conventional imaging techniques. Here, it is demonstrated that plasmonic color filters can be used for the direct optical imaging and characterization of ion implantation in thin films. A model system consisting of variable doses of gallium ions implanted within titanium oxide thin films is used. It is observed that the ion implantation dose leads to a variation in the measured plasmon resonance spectra, which can be further enhanced through the use of bimodal nanopixel arrays. Using Monte Carlo simulations and the Maxwell‐Garnett relation, the observed plasmon resonance spectra in terms of the gallium ion implantation dose is quantitatively interpreted.

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Enhanced optical absorption of rutile TiO2 through (Sm, C) codoping: a first-principles study

et al. 2021

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The electronic structure and optical properties of rutile TiO2 co-doped with nickel and cerium

Cited by 15 publications

References 25 publications

Insight into the Effect of Counterions on the Chromatic Properties of Cr-Doped Rutile TiO2-Based Pigments

Insight into the Effect of Counterions on the Chromatic Properties of Cr-Doped Rutile TiO2-Based Pigments

Bimodal Plasmonic Color Filters Enable Direct Optical Imaging of Ion Implantation in Thin Films

Enhanced optical absorption of rutile TiO2 through (Sm, C) codoping: a first-principles study

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