Impact of Li doping on the microstructure, defects, and physical properties of CuFeO2 multiferroic ceramics

Hirata, Dai; Ye, Fengjiao; Li, Tao; Chen, Zhenping; Cao, Xingzhong; Wang, Boyu

doi:10.1016/j.ceramint.2019.08.186

Cited by 23 publications

(2 citation statements)

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“…For instance, Dai et al. manipulated the optical properties of CuFeO 2 by substituting Cu with Li 16 . Rattanapun et al.…”

Section: Introductionmentioning

confidence: 99%

Tailoring doping locations and types for high‐performance CuFeO₂‐based photocatalysts

Yu,

Zhao

2023

J Am Ceram Soc.

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Doping engineering has been recognized as an effective strategy for improving the solar‐to‐hydrogen conversion efficiency of delafossite CuFeO2‐based photocatalysts. However, a comprehensive and systematic study on the doping effect in CuFeO2 is still needed to establish a universal law. To address this, we utilized density functional theory calculations to scrutinize the doping effects of various dopants at different lattice positions. Our findings revealed that Mn replacing Fe and N replacing O are the most readily achievable doping methods under oxygen‐rich and oxygen‐poor conditions, respectively, with a maximum doping concentration of 1020 cm−3 achievable at 900 K. Interestingly, we found that doping with N for O, F for O, and Ni for Cu generates impurity levels capable of capturing photogenerated holes at the top of the valence band, while Zn for Cu and Co for Fe engender impurity levels capable of capturing photogenerated electrons at the bottom of the conduction band, thereby facilitating the separation of photogenerated electron–hole pairs. However, it is worth highlighting that Mn replacing Fe results in impurity levels forming in the middle of the bandgap, acting as a recombination center for photogenerated electron–hole pairs. Furthermore, we discovered that Mg replacing Cu or Fe serves as an example of heterovalent doping capable of promoting the solar‐to‐hydrogen conversion efficiency of CuFeO2. In isovalent doping, dopants with more valence electrons than Cu, dopants with the same valence electron as Fe, and dopants with less valence electron than O can enhance the solar‐to‐hydrogen conversion efficiency of CuFeO2. Overall, this study provides a systematic analysis of the doping effects on CuFeO2‐based photocatalysts and can be applied to doping engineering of ABO2‐type delafossite photocatalytic materials.

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“…For instance, Dai et al. manipulated the optical properties of CuFeO 2 by substituting Cu with Li 16 . Rattanapun et al.…”

Section: Introductionmentioning

confidence: 99%

Tailoring doping locations and types for high‐performance CuFeO₂‐based photocatalysts

Yu,

Zhao

2023

J Am Ceram Soc.

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“…In addition, it exhibits a unique magnetic behavior, inducing phase transition at low temperature by antiferromagnetic interactions between Fe 3+ ions in CuFeO 2 . Hence, it can be utilized in multifunctional magnetoelectric devices [6,7]. Contrary to other wide band gap delafossite materials, its band gap is visibly light-responsive (1.1~1.6 eV) [8,9].…”

Section: Introductionmentioning

confidence: 99%

Effect of Deposition Parameters on Morphological and Compositional Characteristics of Electrodeposited CuFeO2 Film

Son

2022

Coatings

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Deposition parameters determine the characteristics of semiconductor films in electrodeposition. Thus, it is essential to understand the effect of deposition parameters on the electrodeposited film for fabricating suitable semiconductor film fitting for various applications. In this work, the morphological and compositional properties of electrodeposited delafossite CuFeO2 film, according to the deposition parameters, were studied. The CuFeO2 film was fabricated by the galvanostatic electrodeposition and post-annealing process under inert gas flow. The type of solvent, electrolyte condition, applied current density and deposition time were controlled as the variable deposition parameters. As a result, the typical CuFeO2 film, without any impurities, was electrodeposited in the electrolyte-based DMSO solvent. Interestingly, the concentration of potassium perchlorate as a complexing agent caused morphological change in electrodeposited CuFeO2 film, as well as compositional transition. On the other hand, the applied current density and deposition time only influenced the morphology of electrodeposited CuFeO2 film. These observations would provide specific guidelines for the fabrication of electrodeposited CuFeO2 film with suitable composition and morphology for various applications.

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Influence of particle size on the magnetocaloric and dielectric properties of GdCrO3

Shi

et al. 2022

J Mater Sci: Mater Electron

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Impact of Li doping on the microstructure, defects, and physical properties of CuFeO2 multiferroic ceramics

Cited by 23 publications

References 50 publications

Tailoring doping locations and types for high‐performance CuFeO₂‐based photocatalysts

Tailoring doping locations and types for high‐performance CuFeO₂‐based photocatalysts

Effect of Deposition Parameters on Morphological and Compositional Characteristics of Electrodeposited CuFeO2 Film

Influence of particle size on the magnetocaloric and dielectric properties of GdCrO3

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Impact of Li doping on the microstructure, defects, and physical properties of CuFeO2 multiferroic ceramics

Cited by 23 publications

References 50 publications

Tailoring doping locations and types for high‐performance CuFeO2‐based photocatalysts

Tailoring doping locations and types for high‐performance CuFeO2‐based photocatalysts

Effect of Deposition Parameters on Morphological and Compositional Characteristics of Electrodeposited CuFeO2 Film

Influence of particle size on the magnetocaloric and dielectric properties of GdCrO3

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Product

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About

Tailoring doping locations and types for high‐performance CuFeO₂‐based photocatalysts

Tailoring doping locations and types for high‐performance CuFeO₂‐based photocatalysts