Self-powered highly enhanced broad wavelength (UV to visible) photoresponse of ZnO@ZnO1−xSx@ZnS core–shell heterostructures

Sarkar, Sanjit; Mahapatra, Ayon Das; Basak, Durga

doi:10.1016/j.jcis.2018.03.110

Cited by 29 publications

(11 citation statements)

References 65 publications

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“…CasaXPS software was employed to carry out spectral deconvolution, for which Gaussian-Lorentzian components with 30% Lorentzian character were fitted to the measured data above a Shirley-type background function. Physically realistic fits were obtained by imposing a 2:1 area ratio and equal full-widths-at-half-maximum for each pair of 2p 3/2 and 2p 1/2 components, whilst the spin orbit separation between them was constrained to characteristic values of 23.00 eV ( Wang et al, 2015b ; Kwoka et al, 2020 ) and 1.16 eV ( Sarkar et al, 2018 ) for Zn 2p and S 2p spectra, respectively. After calibrating for the transmission function of the spectrometer and applying mean free path correction, the total measured area of each deconvolved spectrum was divided by the relevant relative sensitivity factor to determine the surface atomic composition of a given sample.…”

Section: Experimental and Computational Detailsmentioning

confidence: 99%

Photocatalytic Degradation of Rhodamine B Dye and Hydrogen Evolution by Hydrothermally Synthesized NaBH4—Spiked ZnS Nanostructures

et al. 2022

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Metal sulphides, including zinc sulphide (ZnS), are semiconductor photocatalysts that have been investigated for the photocatalytic degradation of organic pollutants as well as their activity during the hydrogen evolution reaction and water splitting. However, devising ZnS photocatalysts with a high overall quantum efficiency has been a challenge due to the rapid recombination rates of charge carriers. Various strategies, including the control of size and morphology of ZnS nanoparticles, have been proposed to overcome these drawbacks. In this work, ZnS samples with different morphologies were prepared from zinc and sulphur powders via a facile hydrothermal method by varying the amount of sodium borohydride used as a reducing agent. The structural properties of the ZnS nanoparticles were analysed by X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS) techniques. All-electron hybrid density functional theory calculations were employed to elucidate the effect of sulphur and zinc vacancies occurring in the bulk as well as (220) surface on the overall electronic properties and absorption of ZnS. Considerable differences in the defect level positions were observed between the bulk and surface of ZnS while the adsorption of NaBH4 was found to be highly favourable but without any significant effect on the band gap of ZnS. The photocatalytic activity of ZnS was evaluated for the degradation of rhodamine B dye under UV irradiation and hydrogen generation from water. The ZnS nanoparticles photo-catalytically degraded Rhodamine B dye effectively, with the sample containing 0.01 mol NaBH4 being the most efficient. The samples also showed activity for hydrogen evolution, but with less H2 produced compared to when untreated samples of ZnS were used. These findings suggest that ZnS nanoparticles are effective photocatalysts for the degradation of rhodamine B dyes as well as the hydrogen evolution, but rapid recombination of charge carriers remains a factor that needs future optimization.

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Section: Experimental and Computational Detailsmentioning

confidence: 99%

Photocatalytic Degradation of Rhodamine B Dye and Hydrogen Evolution by Hydrothermally Synthesized NaBH4—Spiked ZnS Nanostructures

et al. 2022

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“…The formation of the ZnO 1−x S x caused suitable band alignment at the ZnO NRs/ZnS heterointerface. Thus, the transfer of photogenerated electrons and holes was prompted, resulting in improved photoresponse properties [11]. Deka et al reported a self-powered core-shell UV photodetector based on PbS decorated ZnO NRs/reduced graphene oxide heterojunction.…”

Section: ) Core-shell-based Self-powered Ultraviolet Photodetectorsmentioning

confidence: 99%

“…To circumvent these disadvantages, photodetectors fabrication based on wide bandgap semiconductors, such as ZnSe [10], ZnS [11], ZnTe [12], CdSe [13], CdS [14], ZnO [15]- [20], TiO 2 [21], SnO 2 [22], GaN [23], SiC [24], Ga 2 O 3 [25] and diamond [26] have attracted significant attention due to their intrinsic solar-blindness, lack of need for any filters or refrigeration, and so on. Among them, wurtzite-ZnO (Wz-ZnO) has captured increasing attention due to its peculiar physical and chemical properties, for example, better thermal stability, piezoelectric, and pyroelectric properties.…”

Section: Introductionmentioning

confidence: 99%

Using Novel Semiconductor Features to Construct Advanced ZnO Nanowires-Based Ultraviolet Photodetectors: A Brief Review

Xiu-sheng

Liu

et al. 2021

IEEE Access

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Ultraviolet photodetectors have attracted significant research attention in recent years due to their potential applications in civilian and military fields. ZnO nanowires and nanorods have been regarded as the most potential candidates for ultraviolet photodetectors fabrication because of their peculiar characteristics and size effect, which are different from their bulk material. Recently, many novel routes and semiconductor features, such as the surface and interface engineering, the pryo-phototronic effect, the piezo-phototronic effect, the surface plasmon effect and the surface functionalization have been utilized to improve the photoelectric characteristics of ultraviolet photodetectors. Thus, the working mechanism of these effects existing in ZnO nanowires/nanorods-based ultraviolet photodetectors should be investigated in-depth. In this paper, firstly, the hydrothermal method and the chemical vapor deposition method, as two typical synthesis methods of ZnO nanowires are briefly reviewed. Secondly, we focus on reviewing the properties of varied ZnO nanowires/nanorods-based ultraviolet photodetectors constructed using the above mentioned semiconductor features with metal-semiconductor-metal structure, Schottky barrier structure, vertical p-n heterojunction structure and core-shell heterostructure. Furthermore, the most attractive self-powered ultraviolet photodetectors are systematically reviewed. For various ZnO nanowires/nanorods-based ultraviolet photodetectors, we put the emphasis on the working mechanism of semiconductor features to improve the properties of the photodetectors. Finally, we give an outlook on the future development of ZnO nanowires/nanorods-based ultraviolet photodetectors.

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“…Using a technique that can easily yield an active semiconducting film over a large area of a paper is the key to producing cheap photodetectors with the so-called biodegrading properties. , Success of this biodegradable paper based photodetector can create one more way to stop the electronic wastage phenomenon from expanding even more. Since use of broad-band photodetectors is rapidly expanding in our daily life as well as in various sophisticated applications such as communication technology, military usage, bioimaging, camera sensors, and automatic doors, etc., − paper based eco-friendly broad-band photodetectors may add huge benefits to society.…”

Section: Introductionmentioning

confidence: 99%

Biodegradable Filter Paper Based Broad-Band Photodetection by Chemical Bath Deposited SnS₂ 2D-Nanosheet Array Film

Mahapatra

Basak

2021

ACS Appl. Electron. Mater.

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We breathe in a world where growing electronic wastages are a serious threat to our ecosystem, and therefore biodegradable devices are more in demand. We have unprecedentedly demonstrated broad-band low-intensity photodetection by SnS 2 two-dimensional (2D) nanosheet (NS) array film grown on Whatman filter paper based biodegradable substrate. Phase pure SnS 2 2D NS array film has been obtained using a low-cost facile chemical bath deposition technique as confirmed by X-ray diffractometry, X-ray photoelectron spectroscopy, and field emission scanning electron microscopy. Unprecedentedly, these biodegradable substrates based SnS 2 NS array films can detect lights of wavelengths of 400 and 500 nm with photoresponsivity values of 6.31 and 10.22 mA/W, respectively. Uniquely, the SnS 2 NS array film also detects very low-intensity lights of 43 μW/cm 2 (400 nm) and 42 μW/cm 2 (500 nm) with photoresponsivity values of 15.87 and 20.24 mA/W with detectivity values of 3.04 × 10 10 and 3.88 × 10 10 jones, respectively. Very stable broad-band photoresponse under successive illumination conditions has also been demonstrated. Collated experimental data support a photoresponse mechanism involving defect levels. This filter paper based photoactive SnS 2 2D-NS array film can be applied to fabricate biodegradable low-intensity broad-band photodetector devices.

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Self-powered highly enhanced broad wavelength (UV to visible) photoresponse of ZnO@ZnO1−xSx@ZnS core–shell heterostructures

Cited by 29 publications

References 65 publications

Photocatalytic Degradation of Rhodamine B Dye and Hydrogen Evolution by Hydrothermally Synthesized NaBH4—Spiked ZnS Nanostructures

Photocatalytic Degradation of Rhodamine B Dye and Hydrogen Evolution by Hydrothermally Synthesized NaBH4—Spiked ZnS Nanostructures

Using Novel Semiconductor Features to Construct Advanced ZnO Nanowires-Based Ultraviolet Photodetectors: A Brief Review

Biodegradable Filter Paper Based Broad-Band Photodetection by Chemical Bath Deposited SnS₂ 2D-Nanosheet Array Film

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Self-powered highly enhanced broad wavelength (UV to visible) photoresponse of ZnO@ZnO1−xSx@ZnS core–shell heterostructures

Cited by 29 publications

References 65 publications

Photocatalytic Degradation of Rhodamine B Dye and Hydrogen Evolution by Hydrothermally Synthesized NaBH4—Spiked ZnS Nanostructures

Photocatalytic Degradation of Rhodamine B Dye and Hydrogen Evolution by Hydrothermally Synthesized NaBH4—Spiked ZnS Nanostructures

Using Novel Semiconductor Features to Construct Advanced ZnO Nanowires-Based Ultraviolet Photodetectors: A Brief Review

Biodegradable Filter Paper Based Broad-Band Photodetection by Chemical Bath Deposited SnS2 2D-Nanosheet Array Film

Contact Info

Product

Resources

About

Biodegradable Filter Paper Based Broad-Band Photodetection by Chemical Bath Deposited SnS₂ 2D-Nanosheet Array Film