Composition-tunable ternary CdS1−xSex/graphene composites with enhanced photocurrent response

Lei, Yun; He, Yue; Fang, Chengcheng

doi:10.1007/s10854-016-5602-2

Cited by 6 publications

(5 citation statements)

References 23 publications

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“…However, when the UV light is turned off, the photocurrent of the material sharply drops to its lowest point. The result indicates that semiconductor materials with different contents have good photoresponse . Comparing CdS x Se 1– x semiconductors with different Se/S ratios, the photocurrent intensity increases with the increase of the Se content due to the adjustable band gap of CdS x Se 1– x semiconductors.…”

Section: Resultsmentioning

confidence: 92%

“…Graphite oxide (GO) was prepared by the modified Hummer's method. 16 5 g of natural flake graphite, 2.5 g of NaNO 3 , 15 g of KMnO 4 , and 110 mL of H 2 SO 4 were mixed, and the mixture was kept at 4−6 °C for 1.5 h. Next, the solution was reacted at 38 °C for 0.5 h. Then, 220 mL of deionized water and 30 mL of H 2 O 2 were orderly added to the solution, and the solution was maintained at 95 °C for 0.5 h. After the product was washed and dried at 60 °C, GO was obtained. The appropriate amount of GO was placed in a quartz boat, and the reaction was maintained at 500 °C for 2 h under a nitrogen atmosphere.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…The result indicates that semiconductor materials with different contents have good photoresponse. 16 Comparing CdS x Se 1−x semiconductors with different Se/S ratios, the photocurrent intensity increases with the increase of the Se content due to the adjustable band gap of CdS x Se 1−x semiconductors. Since the band gap energy was narrowed at the Se/S ratio of 0.75:0.25, more electrons were excited under light irradiation and more photoelectrons were separated and transferred to increase the photocurrent density of CdS x Se 1−x semiconductors.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

See 2 more Smart Citations

Fabrication of CdSSe-Decorated Graphene Aerogel with Enhanced Photoelectric Properties

Du,

Lei,

Wang

et al. 2024

ACS Appl. Electron. Mater.

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The folding and conversion of the graphene fragment into honeycomb three-dimensional graphene aerogel (3DrGO) gave it a larger specific surface area and faster carrier mobility. CdS x Se 1−x at a superior S/Se ratio of 0.25:0.75 was loaded on 3DrGO and two-dimensional lamellar graphene (2DrGO) to form CdS 0.25 Se 0.75 /3DrGO and CdS 0.25 Se 0.75 / 2DrGO by the solvothermal method. The effect of the 3DrGO content on the photoelectric performance of CdS 0.25 Se 0.75 /3DrGO was investigated, and the difference between the 2D lamellar structure and 3D porous structure on the photoelectric performance of the composites was compared. As the 3DrGO content rose to 25%, the photocurrent intensity of CdS 0.25 Se 0.75 /3DrGO gradually increased to the maximum of 5.1 × 10 −5 A/m 2 , which was superior to that of CdS 0.25 Se 0.75 /2DrGO at the same 2DrGO content. The results showed that CdS 0.25 Se 0.75 /3DrGO exhibited a higher carrier density (3.79 × 10 20 cm −3 ) and a larger specific surface area (90.58 m 2 /g) and provided a faster transfer channel for photogenerated electrons due to the introduction of 3DrGO.

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Section: Resultsmentioning

confidence: 92%

Section: ■ Experimental Sectionmentioning

confidence: 99%

Section: ■ Experimental Sectionmentioning

confidence: 99%

See 1 more Smart Citation

Fabrication of CdSSe-Decorated Graphene Aerogel with Enhanced Photoelectric Properties

Du,

Lei,

Wang

et al. 2024

ACS Appl. Electron. Mater.

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“…Furthermore, the growth velocity of inclusions in molten steel is generally influenced by the attractive force between the inclusions. [ 20,21 ] Therefore, the researchers have tried to directly measure the attractive force between alumina inclusions and to explain the phenomenon of mutual attraction in molten steel. Sasai [ 22 ] measured the attractive force between the alumina inclusions by measuring the two alumina rods inserted into the molten steel.…”

Section: Introductionmentioning

confidence: 99%

Effect of Al–Ti Concentration on Alumina Inclusions Aggregation Floating Behavior in Molten IF Steel

Long,

Wang,

Gao

et al. 2023

steel research int.

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Understanding the aggregation‐floating behavior of alumina inclusions, which is influenced by the interface properties between inclusions and molten steel, is crucial to controlling the purity of IF (interstitial‐free) steel in the refining process. This work attempts to investigate the effect of aluminum and titanium concentrations on the aggregation‐floating behavior of alumina inclusions in the interior of IF molten steel based on the interface properties between molten steel and alumina inclusions. The interface properties between the molten steel and alumina inclusions were measured using an improved sessile drop method. And the aggregation‐floating behavior of inclusions in the interior of molten steel has been quantitatively discussed by an aggregation model based on the attractive force between alumina inclusions, which was combined with the interface properties. The results show that the attractive forces between alumina inclusions, ranging from 6.96×10‐6 to 5.41×10‐5 N, increase and decrease, respectively, with increasing aluminum and titanium concentrations. Furthermore, the terminal floating speeds of alumina inclusions, ranging from 0.0510 to 0.0873 m/s, increase and decrease, respectively, with increasing aluminum and titanium concentrations.This article is protected by copyright. All rights reserved.

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“…Theories about inclusion movement in the simplified conditions such as steady fluid flow are well established, [1][2][3] and collision and aggregation among inclusions also can be modeled in spite of the variety and complexity of its aspects, [4][5][6] but the theory for realistic situations of inclusion behavior in the molten steel is still lacking. These complex phenomena will become understood only when the interactive coupling of fluid dynamics and inclusion dynamics are clarified.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Model for Cluster-Inclusion’s Collision-Growth in Inclusion Cloud at Continuous Casting Mold

Lei¹,

Zhao

Geng³

2014

ISIJ Int.

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The inclusion's morphology and size play a strong role in the steel product quality, so it is very important to have a deep insight into the inclusion's collision-growth in the continuous caster. In order to describe the formation of the cluster-inclusion, a mathematical model and the related source code are developed to trace the inclusion's movement and collision-growth in the inclusion cloud. Such a model includes two sub-models. Firstly, the spatial distribution of turbulent flow and the inclusion's number density and the characteristic radius after Stokes collision and turbulent collision are obtained by Eulerian approach. Secondly, the inclusion's trajectory and the related inclusion fractal growth are predicted by Lagrangian approach. Numerical results show that the spatial distributions of the inclusion volumetric concentration, number density and characteristic radius have some features of the upper and lower recirculation zone due to the fluid flow. For an inclusion particle, the bigger inclusion has more chances to catch other inclusions and forms a more complex cluster-structure. Among the forces acting on the inclusion, the pressure gradient force, Basset history force, the visual mass force, the gravitational force and the buoyancy force should be considered in order to describe the inclusion's exact motion. Furthermore, the pressure gradient force, the Basset force, the visual mass force follow the same variation rule along with the inclusion's trajectory.

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Composition-tunable ternary CdS1−xSex/graphene composites with enhanced photocurrent response

Cited by 6 publications

References 23 publications

Fabrication of CdSSe-Decorated Graphene Aerogel with Enhanced Photoelectric Properties

Fabrication of CdSSe-Decorated Graphene Aerogel with Enhanced Photoelectric Properties

Effect of Al–Ti Concentration on Alumina Inclusions Aggregation Floating Behavior in Molten IF Steel

Mathematical Model for Cluster-Inclusion’s Collision-Growth in Inclusion Cloud at Continuous Casting Mold

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