Realization of UV-C absorption in ZnO nanostructures using fluorine and silver co-doping

Muhammad, A.; Hassan, Z.; Mohammad, Sabah M.; Rajamanickam, Suvindraj; Abed, Shireen Mohammed; Ashiq, Mohammad

doi:10.1016/j.colcom.2022.100588

Cited by 15 publications

(5 citation statements)

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“…However, shorter wavelengths, e. g. 240 nm, at reflectance spectra and 4.8 eV at diffusive reflectance spectra are not caused by intrinsic impurity defects, but rather the chemisorption of hydrogen from the ambient air. The binding energy of hydrogen on the ZnO surface has been related as approximately 4.87 eV in the literature [61,62] . The band gap is associated with the material capacity to collect light for posteriori application.…”

Section: Resultsmentioning

confidence: 99%

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Facile Formation of Sulfurized Nanorod‐Like ZnO/Zn(OH)₂ and Hierarchical Flower‐Like γ‐Zn(OH)₂/ϵ‐Zn(OH)₂ from a Green Synthesis and Application as Luminescent Solar Concentrator

Rodrigues,

Onishi,

Ribeiro

2023

ChemPhysChem

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This research endeavors to overcome the significant challenge of developing materials that simultaneously possess photostability and photosensitivity to UV‐visible irradiation. Sulfurized NR‐like ZnO/Zn(OH)2 and hierarchical flower‐like γ‐Zn(OH)2/ε‐Zn(OH)2 were identified from XRD diffraction patterns and Raman vibrational modes. The sulfurized material, observed by FEG‐SEM and TEM, showed diameters ranging from 10 and 40 nm and lengths exceeding 200 nm. The S2‐ ions intercalated Zn2+, modulating NRs to dumbbell‐like microrods. SAED and HRTEM illustrated the atomic structure in (101) crystal plane. Its band gap of 3.0 eV value from a direct transition was attributed to the oxygen vacancies, contributing also to the deep‐level emissions at 422 nm and 485 nm. BET indicated specific surface area of 4.4 m2 g‐1 and pore size as mesoporosity, higher values than the non‐sulfurized one. These findings were consistent with the observed photocurrent, photostability and PL, further supporting the suitability of sulfurized NR‐like ZnO/Zn(OH)2 as a promising candidate for LSC‐PV system.

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Section: Resultsmentioning

confidence: 99%

“…The binding energy of hydrogen on the ZnO surface has been related as approximately 4.87 eV in the literature. [61,62] The band gap is associated with the material capacity to collect light for posteriori application. In case of the ZnO semiconductor, it can collect the UV light, which is only 4 % of the whole solar spectra.…”

Section: Resultsmentioning

confidence: 99%

Facile Formation of Sulfurized Nanorod‐Like ZnO/Zn(OH)₂ and Hierarchical Flower‐Like γ‐Zn(OH)₂/ϵ‐Zn(OH)₂ from a Green Synthesis and Application as Luminescent Solar Concentrator

Rodrigues,

Onishi,

Ribeiro

2023

ChemPhysChem

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“…The absence of impurity diffraction peaks in the XRD pattern indicates that the ZnO (NRs) was pure. The average crystallite size of ZnO nanostructures along the (0 0 2) peak was obtained by the Scherrer equation shown in equation (1) (Shabannia, 2015; Muhammad et al , 2022): …”

Section: Resultsmentioning

confidence: 99%

Fabrication of UV ZnO NRS photodetector based on seeded silicon substrate via the drop-casting technique

Abed

Mohammad

Hassan

et al. 2022

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Purpose The purpose of this study is to fabricate an ultraviolet (UV) metal-semiconductor-metal (MSM) photodetector based on zinc oxide nanorods (ZnO NRs) grown on seeded silicon (Si) substrate that was prepared by a low-cost method (drop-casting technique). Design/methodology/approach The drop-casting method was used for the seed layer deposition, the hydrothermal method was used for the growth of ZnO NRs and subsequent fabrication of UV MSM photodetector was done using the direct current sputtering technique. The performance of the fabricated MSM devices was investigated by current–voltage (I–V) measurements. The photodetection mechanism of the fabricated device was discussed. Findings Semi-vertically high-density ZnO (NRs) were effectively produced with a preferential orientation along the (002) direction, and increased crystallinity is confirmed by X-ray diffraction analysis. Photoluminescence results show a high UV region. The fabricated MSM UV photodetector showed that the ZnO (NRs) MSM device has great stability over time, high photocurrent, good sensitivity and high responsivity under 365 nm wavelength illumination and 0 V, 1 V, 2 V and 3 V applied bias. The responsivity and sensitivity for the fabricated ZnO NRs UV photodetector are 0.015 A W-1, 0.383 A W-1, 1.290 A W-1 and 1.982 A W-1 and 15,030, 42.639, 100.173 and 334.029, respectively, under UV light (365 nm) illumination at (0 V, 1 V, 2 V and 3 V). Originality/value This paper uses the drop-casting technique and the hydrothermal method as simple and low-cost methods to fabricate and improve the ZnO NRs photodetector.

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“…One of the alterations in the optical properties of semiconductors thin films is the shifting of the band gap values. Research has achieved that by adding materials that reduce the band gap by aligning the valence and conduction bands of the ZnO closer to the electron-occupied sites of the doping materials [19][20][21]. Authors have added ions such as Mg 2+ to change the optical properties of the ZnO, such as the Urbach Energy [22].…”

Section: Introductionmentioning

confidence: 99%

Effects of Lithium Salt on Optical and Structural Properties of ZnO Thin Films

Nunes,

Almeida,

Freire

2024

NHC

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Thin film semiconductors are broadly applied in optical and energy conversion devices. Some thin films comprise titanium dioxide, tin oxide, and zinc oxide. The characteristics of the thin films can be changed according to their application. Zinc oxide semiconductors thin films were combined with different concentrations of LiClO4, varying between 5 and 15% weight percentage. This study aimed to qualify and quantify the morphological, structure, and optical changes in ZnO affected by the presence of lithium salt in the microstructure. The x-ray measurements demonstrated larger polycrystalline sizes, a maximum of 57.53 nm. The band gap energy values lowered to 3.16 eV, lower than the usual 3.37 eV, and reflectance values reached 80%.

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Realization of UV-C absorption in ZnO nanostructures using fluorine and silver co-doping

Cited by 15 publications

References 50 publications

Facile Formation of Sulfurized Nanorod‐Like ZnO/Zn(OH)₂ and Hierarchical Flower‐Like γ‐Zn(OH)₂/ϵ‐Zn(OH)₂ from a Green Synthesis and Application as Luminescent Solar Concentrator

Facile Formation of Sulfurized Nanorod‐Like ZnO/Zn(OH)₂ and Hierarchical Flower‐Like γ‐Zn(OH)₂/ϵ‐Zn(OH)₂ from a Green Synthesis and Application as Luminescent Solar Concentrator

Fabrication of UV ZnO NRS photodetector based on seeded silicon substrate via the drop-casting technique

Effects of Lithium Salt on Optical and Structural Properties of ZnO Thin Films

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Realization of UV-C absorption in ZnO nanostructures using fluorine and silver co-doping

Cited by 15 publications

References 50 publications

Facile Formation of Sulfurized Nanorod‐Like ZnO/Zn(OH)2 and Hierarchical Flower‐Like γ‐Zn(OH)2/ϵ‐Zn(OH)2 from a Green Synthesis and Application as Luminescent Solar Concentrator

Facile Formation of Sulfurized Nanorod‐Like ZnO/Zn(OH)2 and Hierarchical Flower‐Like γ‐Zn(OH)2/ϵ‐Zn(OH)2 from a Green Synthesis and Application as Luminescent Solar Concentrator

Fabrication of UV ZnO NRS photodetector based on seeded silicon substrate via the drop-casting technique

Effects of Lithium Salt on Optical and Structural Properties of ZnO Thin Films

Contact Info

Product

Resources

About

Facile Formation of Sulfurized Nanorod‐Like ZnO/Zn(OH)₂ and Hierarchical Flower‐Like γ‐Zn(OH)₂/ϵ‐Zn(OH)₂ from a Green Synthesis and Application as Luminescent Solar Concentrator

Facile Formation of Sulfurized Nanorod‐Like ZnO/Zn(OH)₂ and Hierarchical Flower‐Like γ‐Zn(OH)₂/ϵ‐Zn(OH)₂ from a Green Synthesis and Application as Luminescent Solar Concentrator