Doping of aluminum (Al) into copper sulfide (CuS) nanocrystals enhanced their solar spectral selectivity

Jing, Jiang; Gu, Xiaoyu; Jun, Sun; Chen, Yu; Sun, Tongbing

doi:10.1039/c9ce00668k

Cited by 20 publications

(11 citation statements)

References 33 publications

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“…This iodine doping can occur because of the higher electronegativity of iodine compared to that of Cu, [18] similar doping mechanism with previously reported metal-ion-doped CuS. [19][20][21][22][23][24][25][26] The CuS electrode, which is covellite and nanosheet structure, was synthesized based on a room-temperature sulfur activation method which is reported at our previous article. [27] The thickness of CuS was controlled to be 20 % 40 nm which is optimized conditions with a low sheet resistance (Figure 1b).…”

Section: Resultssupporting

confidence: 73%

“…These enhanced properties can be attributed to the induced iodine molecules that are adsorbed to the sulfur vacancy sites in CuS, resulting in the increase of the hole concentration. [ 21 , 32 ] Such changes in the electrical properties of the CuS nanosheet upon the iodine doping indicate that the iodine is an effective in modulating the charge carrier densities of CuS electrode and leads to more metallic electrical properties (Figure S4, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

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Electronic Modulation of Semimetallic Electrode for 2D van der Waals Devices

et al. 2023

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The 2D semimetallic electrodes have been employed to show outstanding contact properties with 2D semiconducting transition‐metal dichalcogenides (TMDCs) channel, leading to large enhancement of 2D transistor and phototransistor performance. Herein, an innovative concept is established for a unique 2D semimetallic electrode‐2D TMDC channel (2D–2D) device configuration where the electronic structures of 2D semimetallic electrodes are systematically modulated to improve the contact properties with 2D monolayer molybdenum disulfide (MoS2) channel. The 2D semimetallic copper sulfide (CuS) electrodes are doped with iodine atoms by a direct exposure of iodine gas. The contact properties and charge‐transport behavior in the 2D–2D field‐effect transistors (FETs) are highly improved, which is attributed to the favorable energy band alignment and associated material properties between the iodine‐doped CuS (CuS–I) electrodes and 2D channel. The 2D–2D FETs show a high on current, high on/off ratio, and twofold improvement in mobility. Furthermore, 2D–2D phototransistors and flexible/transparent photodetectors are fabricated using the CuS–I/MoS2, which also performed outstanding photoresponsivity characteristics and mechanical durability under external bending strain conditions. These findings demonstrate a promising pathway that under the 2D–2D configuration, the electronic modulation by the iodine atoms may enable the development of future 2D electronic applications.

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Section: Resultssupporting

confidence: 73%

Section: Resultsmentioning

confidence: 99%

Electronic Modulation of Semimetallic Electrode for 2D van der Waals Devices

et al. 2023

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“…Previous studies have shown that the composition, surface morphology, and crystalline phase of CuS nanoparticles influence their photocatalytic efficiencies [ 21 , 22 ]. These properties are affected by the synthetic methods used for the preparation of CuS nanoparticles, which includes solvothermal [ 23 ], hydrothermal [ 24 ], sol-gel [ 25 ], micro-emulsion [ 26 ], microwave [ 27 ], sonochemical [ 28 ], electrospinning [ 29 ] and single-source precursors [ 30 , 31 ]. The use of a single-source precursor to prepare CuS nanoparticles has been reported to give high-quality nanoparticles due to the metal-sulfur bond in the precursors [ 32 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Degradation of Ternary Dyes by Copper Sulfide Nanoparticles

Ajibade

Oluwalana

2021

Nanomaterials

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We report the effect of thermolysis time on the morphological and optical properties of CuS nanoparticles prepared from Cu(II) dithiocarbamate single-source precursor. The as-prepared copper sulfide nanoparticles were used as photocatalysts for the degradation of crystal violet (CV), methylene blue (MB), rhodamine B (RhB), and a ternary mixture of the three dyes (CV/MB/RhB). Powder XRD patterns confirmed the hexagonal covellite phase for the CuS nanoparticles. At the same time, HRTEM images revealed mixed shapes with a particle size of 31.47 nm for CuS1 prepared at 30 min while CuS2 prepared at 1 h consists of mixtures of hexagonal and nanorods shaped particles with an average size of 21.59 nm. Mixed hexagonal and spherically shaped particles with a size of 17.77 nm were obtained for CuS3 prepared at 2 h. The optical bandgaps of the nanoparticles are 3.00 eV for CuS1, 3.26 eV for CuS2 and 3.13 eV for CuS3. The photocatalytic degradation efficiency showed that CuS3 with the smallest particle size is the most efficient photocatalyst and degraded 85% of CV, 100% of MB, and 81% of RhB. The as-prepared CuS showed good stability and recyclability and also degraded ternary dyes mixture (CV/MB/RhB) effectively. The byproducts of the dye degradation were evaluated using ESI-mass spectrometry.

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“…CuS nanomaterials are endowed with the optical band gap energy ranging from 1.2 to 2.5 eV, particularly with an enhanced light absorption in the NIR region by means of the localized surface plasmon resonances. [39,40] Likewise, CDs also possess a tunable bandgap due to the quantum size effect and they have superior photoinduced electron transfer and electron reservoir properties. [15][16][17][41][42][43][44] After integration of them into a heterostructure, the formed interfaces not only create the new absorption bands for improving sunlight harvesting (see Figure 2a), but also induce internal electric fields to facilitate charge separation and migration (see Figure 4c,d).…”

Section: Resultsmentioning

confidence: 99%

Electricity‐Boosted Solar‐to‐Vapor Conversion upon Fiber‐Supported CDs@CuS for Rapidly Vaporizing Seawater

Liu

Chang

et al. 2022

Solar RRL

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A novel proof‐of‐concept strategy to enhance the evaporation rate (ER) and solar conversion efficiency of the solar‐driven interfacial evaporation (SDIE) technique is presented. This strategy is able to employ photovoltaic (PV) electricity for powering photothermal convertor, thus the photoinduced electrons from the nanocomposite of carbon dots (CDs) and CuS can be fully converted into heat for rapidly vaporizing seawater. The presented system enables a steam generation rate of above 6.66 kg m−2 h−1 with a solar‐to‐vapor efficiency of up to 183% in 3.5% salt brine under one sun. Such high performance is ascribed to the instantaneous release of more heat energy within the confined photothermal layer, resulting in the vaporization of more water adsorbed in this layer. Moreover, the experimental results reveal that the solar evaporation performances of the presented system are determined by the applied voltages and interfacial charge transfer efficiency of the sunlight harvesting agent under constant solar illumination.

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Doping of aluminum (Al) into copper sulfide (CuS) nanocrystals enhanced their solar spectral selectivity

Abstract: Al-CuS/PVA film possessed low NIR transmittance and high visible light transmittance. CuS nanocrystals doping Al significantly enhance their solar spectral selectivity.

Cited by 20 publications

References 33 publications

Electronic Modulation of Semimetallic Electrode for 2D van der Waals Devices

Electronic Modulation of Semimetallic Electrode for 2D van der Waals Devices

Enhanced Photocatalytic Degradation of Ternary Dyes by Copper Sulfide Nanoparticles

Electricity‐Boosted Solar‐to‐Vapor Conversion upon Fiber‐Supported CDs@CuS for Rapidly Vaporizing Seawater

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