Electromodulated transmittance of optical transitions in tungsten oxide

Al-Kuhaili, M.F.

doi:10.1016/j.jpcs.2019.109317

Cited by 6 publications

(2 citation statements)

References 37 publications

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“…According to the low binding energy cutoffs (Figure b), the valence band maximum (VBM) value of the W 18 O 49 NWA-2, W 18 O 49 NWA, and W 18 O 49 NWA+2 can be obtained as ∼−7.38, ∼−7.42, and ∼−7.58 eV, respectively, relative to the vacuum level. Based on the UV–vis–NIR absorption spectrum of the W 18 O 49 NWA, the bandgap energy of W 18 O 49 NWA can be achieved by the following equation: α h v = A ( h v − E g ) n / 2 where v , α, and E g are the frequency, absorption coefficient, and bandgap energy of the semiconductor, respectively. A is a constant.…”

Section: Resultsmentioning

confidence: 99%

W₁₈O₄₉ Nanowire Arrays for Plasmonic Photodetector with Electromediated Broadband Photoresponse

Zhu

Lü

et al. 2023

ACS Appl. Nano Mater.

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Plasmonic semiconductors offer significant advantages for the development of photodetectors with a tunable wide spectral response. Herein, we developed a plasmonic semiconductor photodetector based on the W 18 O 49 nanowire array (NWA) to achieve a tunable broadband photodetector by adjusting the plasmonic absorption intensity of the W 18 O 49 NWA. The plasmonic absorption intensity could be mediated through adjusting the free electron density of the W 18 O 49 NWA by applying the external voltage on the W 18 O 49 NWA-loaded electrode in HCl electrolyte. When the applied voltage decreased from +2 to −2 V, the plasmonic absorption intensity of the W 18 O 49 NWA gradually enhanced due to the increased electron density. As a result, the responsivity and detectivity of the W 18 O 49 NWA-based photodetector in the visible−NIR region were dramatically increased. Especially, upon 940 nm illumination, the responsivity and detectivity could reach ∼47.2 mA W −1 and ∼8.22 × 10 9 Jones, respectively, which is much higher than the corresponding values (∼2.9 mA W −1 and ∼4.53 × 10 9 Jones) obtained by the W 18 O 49 NWA-based photodetector with a low plasmonic absorption. This work proposes a promising strategy to construct broadband-tunable photodetectors by using lowcost nonmetallic plasmonic nanostructures.

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Section: Resultsmentioning

confidence: 99%

W₁₈O₄₉ Nanowire Arrays for Plasmonic Photodetector with Electromediated Broadband Photoresponse

Zhu

Lü

et al. 2023

ACS Appl. Nano Mater.

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“…Furthermore, the absorption edge of W 18 O 49 films shifted to a shorter wavelength (blue shift) when increasing the deposition time, which can presumably be ascribed to the quantum size effect. The optical band gap of the prepared photo-anodes is calculated using the Tauc relation[27,28]:(αhv) n = A(hv − E g )…”

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confidence: 99%

Nanostructured Magnéli-Phase W18O49 Thin Films for Photoelectrochemical Water Splitting

et al. 2020

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Converting water into hydrogen through the photo-electrochemical (PEC) process is one of the most exciting approaches in this field, and there is a quest to design or search for new electro-photo-catalytic materials. In this work, simple steps for fabrication and transformation of metallic tungsten thin film into the photo-active Magnéli-phase (W18O49) of tungsten oxide thin film is demonstrated. The post-annealing temperature has a significant impact on the phase evolution of tungsten film into W18O49. The film thickness of W18O49 is controlled by controlling the sputtering time (or deposition time) of W film. The PEC performance of the as-prepared electrodes is evaluated by monitoring the water oxidation reaction under visible radiation. The PEC findings reveal a correlation between PEC performance and phase, morphology, and thickness of the film. The as-derived W18O49 can efficiently catalyze the water oxidation reaction at neutral solution pH, generating 0.6 and 1.4 mA cm−1 photo-current at 0.6 and 0.8 V vs. Saturated calomel electrode (SCE), respectively, in addition to excellent stability. The electrical conductivity and the charge transfer kinetics are investigated employing the electrochemical impedance spectroscopic (EIS) technique.

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Theoretical and experimental study of the optoelectronic, thermodynamic and vibrational properties of the nanostructure of m-WO3

Gomes,

de Sousa Pinheiro,

Serra

et al. 2024

Ceramics International

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Electromodulated transmittance of optical transitions in tungsten oxide

Cited by 6 publications

References 37 publications

W₁₈O₄₉ Nanowire Arrays for Plasmonic Photodetector with Electromediated Broadband Photoresponse

W₁₈O₄₉ Nanowire Arrays for Plasmonic Photodetector with Electromediated Broadband Photoresponse

Nanostructured Magnéli-Phase W18O49 Thin Films for Photoelectrochemical Water Splitting

Theoretical and experimental study of the optoelectronic, thermodynamic and vibrational properties of the nanostructure of m-WO3

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Electromodulated transmittance of optical transitions in tungsten oxide

Cited by 6 publications

References 37 publications

W18O49 Nanowire Arrays for Plasmonic Photodetector with Electromediated Broadband Photoresponse

W18O49 Nanowire Arrays for Plasmonic Photodetector with Electromediated Broadband Photoresponse

Nanostructured Magnéli-Phase W18O49 Thin Films for Photoelectrochemical Water Splitting

Theoretical and experimental study of the optoelectronic, thermodynamic and vibrational properties of the nanostructure of m-WO3

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Product

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About

W₁₈O₄₉ Nanowire Arrays for Plasmonic Photodetector with Electromediated Broadband Photoresponse

W₁₈O₄₉ Nanowire Arrays for Plasmonic Photodetector with Electromediated Broadband Photoresponse