Structural, optoelectronic and photo-thermoelectric properties of crystalline alloy CuAlxFe1-xO2 delafossite oxide materials

Wheatley, Robert; Roble, M.; Gence, Loïk; Acuña, Claudia; Rojas‐Aedo, Ricardo; Hidalgo‐Rojas, Diego; Cerda, Daniel; Vojkovic, Smiljan; Seifert, Birger; Wallentowitz, S.; Volkmann, U.G.; Díaz-Droguett, D.E.

doi:10.1016/j.jallcom.2020.157613

Cited by 11 publications

(7 citation statements)

References 37 publications

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“…As an example, the two films with a conductivity of 5.0∙10 −6 S cm −1 in the as‐deposited state were annealed in a single step for 30 s and for 105 s. The difference in the conductivity between the short time annealing ( σ blue LED, 30s = 4.2∙10 −4 S cm −1 ) and the long‐time annealing ( σ blue LED, 105s = 4.8∙10 −4 S cm −1 ) is small. The conducted dwell time optimization results in a significant process time reduction from 2 min to 30 s. The rapid optothermal posttreatment of the films is an additional advantage of the PAD film fabrication compared to long‐lasting sintering processes 37 …”

Section: Resultsmentioning

confidence: 99%

Posttreatment of powder aerosol deposited oxide ceramic films by high power LED

Nazarenus

Schlesier

Biberger

et al. 2021

Int J Applied Ceramic Tech

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The powder aerosol deposition (PAD) method is becoming increasingly important as an energetically advantageous coating method compared to classic ceramic technologies. However, due to the process‐related lattice deformation, ceramic coatings often exhibit reduced functional properties in the as‐deposited state. A thermal posttreatment at temperatures well below the sintering temperature can significantly reduce the lattice deformation and the stress within the film to restore the functional film properties close to sintered bulk samples. In this work, the optothermal posttreatment of PAD films using three different high‐power light emitting diodes (HP‐LED) with different wavelengths within the visible light spectrum is investigated as an alternative to time‐consuming furnace or energy‐intensive laser processes on the example of thermoelectric CuFe0.98Sn0.02O2 films. We demonstrate that the space‐saving LED‐based posttreatment not only restores the film properties but also significantly reduces the required processing time to a few seconds.

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Section: Resultsmentioning

confidence: 99%

Posttreatment of powder aerosol deposited oxide ceramic films by high power LED

Nazarenus

Schlesier

Biberger

et al. 2021

Int J Applied Ceramic Tech

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“…[12][13][14] Over the past few years, the development of solid-solution photocatalysts has emerged as a promising approach, exhibiting exceptional potential for achieving enhanced visible-light responses and optimizing the positioning of conduction band/ valence band edges. [15][16][17] Notably, the utilization of Bi 2 W 1−x Mo x O 6 solid solutions has enabled continuous modulation of band gaps within the range of 2.34 to 2.75 eV by altering the Mo/W ratios. Among them, the optimal configuration of Bi 2 W 0.25 Mo 0.75 O 6 monolayer nanosheets demonstrates wellsuited conduction band edge (−0.42 eV) and valence band edge (1.98 eV) positions, leading to excellent selectivity and stability in the photocatalytic reduction of nitrobenzene.…”

Section: Introductionmentioning

confidence: 99%

Tuning electronic structure for enhanced photocatalytic performance: theoretical and experimental investigation of CuM_1−xM′_xO₂ (M, M′ = B, Al, Ga, In) solid solutions

Chen,

Shan,

Zhao

et al. 2023

Dalton Trans.

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“…Delafossite CuFeO 2 is considered an upcoming and promising P-type material for several applications, such as hydrogen generation, antibacterials, and optoelectronics [ 17 , 18 , 19 , 20 ]. This is related to its good optical absorbance behavior and moderate bandgap.…”

Section: Introductionmentioning

confidence: 99%

Development of a Highly Efficient Optoelectronic Device Based on CuFeO2/CuO/Cu Composite Nanomaterials

et al. 2022

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Herein, an optoelectronic device synthesized from a CuFeO2/CuO/Cu nanocomposite was obtained through the direct combustion of Cu foil coated with Fe2O3 nanomaterials. The chemical, morphological, and optical properties of the nanocomposite were examined via different techniques, such as XRD, XPS, TEM, SEM, and UV/Vis spectrophotometer. The optical reflectance demonstrated a great enhancement in the CuFeO2 optical properties compared to CuO nanomaterials. Such enhancements were clearly distinguished through the bandgap values, which varied between 1.35 and 1.38 eV, respectively. The XRD and XPS analyses confirmed the chemical structure of the prepared materials. The produced current density (Jph) was studied in dark and light conditions, thereby confirming the obtained optoelectronic properties. The Jph dependency to monochromatic wavelength was also investigated. The Jph value was equal to 0.033 mA·cm−2 at 390 nm, which decreased to 0.031 mA·cm−2 at 508 nm, and then increased to 0.0315 mA·cm−2 at 636 nm. The light intensity effects were similarly inspected. The Jph values rose when the light intensities were augmented from 25 to 100 mW·cm−2 to reach 0.031 and 0.05 mA·cm−2, respectively. The photoresponsivity (R) and detectivity (D) values were found at 0.33 mA·W−1 and 7.36 × 1010 Jones at 390 nm. The produced values confirm the high light sensitivity of the prepared optoelectronic device in a broad optical region covering UV, Vis, and near IR, with high efficiency. Further works are currently being designed to develop a prototype of such an optoelectronic device so that it can be applied in industry.

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Structural, optoelectronic and photo-thermoelectric properties of crystalline alloy CuAlxFe1-xO2 delafossite oxide materials

Cited by 11 publications

References 37 publications

Posttreatment of powder aerosol deposited oxide ceramic films by high power LED

Posttreatment of powder aerosol deposited oxide ceramic films by high power LED

Tuning electronic structure for enhanced photocatalytic performance: theoretical and experimental investigation of CuM_1−xM′_xO₂ (M, M′ = B, Al, Ga, In) solid solutions

Development of a Highly Efficient Optoelectronic Device Based on CuFeO2/CuO/Cu Composite Nanomaterials

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Structural, optoelectronic and photo-thermoelectric properties of crystalline alloy CuAlxFe1-xO2 delafossite oxide materials

Cited by 11 publications

References 37 publications

Posttreatment of powder aerosol deposited oxide ceramic films by high power LED

Posttreatment of powder aerosol deposited oxide ceramic films by high power LED

Tuning electronic structure for enhanced photocatalytic performance: theoretical and experimental investigation of CuM1−xM′xO2 (M, M′ = B, Al, Ga, In) solid solutions

Development of a Highly Efficient Optoelectronic Device Based on CuFeO2/CuO/Cu Composite Nanomaterials

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Tuning electronic structure for enhanced photocatalytic performance: theoretical and experimental investigation of CuM_1−xM′_xO₂ (M, M′ = B, Al, Ga, In) solid solutions