Hydrothermal synthesis of graphene–CdS composites with improved photoelectric characteristics

Lei, Yun; Li, Rong; Chen, Feifei; Xu, Jun

doi:10.1007/s10854-014-1983-2

Cited by 12 publications

(4 citation statements)

References 13 publications

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“…Sookhakian et al reported that ZnS-RGO composites showed an improvement in photocurrent generation with reduction of charge transfer resistance and charge recombination compared to pure ZnS NPs [56]. Moreover, Lei et al found that the electron capture and transfer ability of graphene could enhance the photoelectric characteristics of the nanocomposites via a comparison between Gr-CdS nanocomposites and pure CdS NPs [57]. Similarly, the performance of the CIGS device could be further enhanced using the Gr-CdS nanocomposite.…”

Section: Cigs Photovoltaic Devicesmentioning

confidence: 99%

Performance of Graphene–CdS Hybrid Nanocomposite Thin Film for Applications in Cu(In,Ga)Se2 Solar Cell and H2 Production

et al. 2020

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A graphene–cadmium sulfide (Gr–CdS) nanocomposite was prepared by a chemical solution method, and its material properties were characterized by several analysis techniques. The synthesized pure CdS nanoparticles (NPs) and Gr–CdS nanocomposites were confirmed to have a stoichiometric atomic ratio (Cd/S = 1:1). The Cd 3d and S 2p peaks of the Gr–CdS nanocomposite appeared at lower binding energies compared to those of the pure CdS NPs according to X-ray photoelectron spectroscopy analyses. The formation of the Gr–CdS nanocomposite was also evidenced by the structural analysis using Raman spectroscopy and X-ray diffraction. Transmission electron microscopy confirmed that CdS NPs were uniformly distributed on the graphene sheets. The absorption spectra of both the Gr–CdS nanocomposite and pure CdS NPs thin films showed an absorption edge at 550 nm related to the energy band gap of CdS (~2.42 eV). The Cu(In,Ga)Se2 thin film photovoltaic device with Gr–CdS nanocomposite buffer layer showed a higher electrical conversion efficiency than that with pure CdS NPs thin film buffer layer. In addition, the water splitting efficiency of the Gr–CdS nanocomposite was almost three times higher than that of pure CdS NPs.

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Section: Cigs Photovoltaic Devicesmentioning

confidence: 99%

Performance of Graphene–CdS Hybrid Nanocomposite Thin Film for Applications in Cu(In,Ga)Se2 Solar Cell and H2 Production

et al. 2020

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“…Specifically, the graphene layer is a major material for use in the production of effective solar cells due to its exceptional combination of optical transparency and high electrical conductivity in the visible and near-infrared spectrum [ 3 , 4 ]. On various substrates, such as Si [ 5 ], CdS [ 6 ], CdSe [ 7 ], and GaAs [ 8 ], graphene-based Schottky junction solar cells have been produced in recent years. A Schottky junction was successfully formed on n-type GaAs by Wenjing et al, producing a power conversion efficiency of 1.95% [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Development and Analysis of Graphene-Sheet-Based GaAs Schottky Solar Cell for Enriched Efficiency

et al. 2023

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Comparative studies of the 2D numerical modelling and simulation of graphene-based gallium arsenide and silicon Schottky junction solar cell are studied using TCAD tools. The performance of photovoltaic cells was examined while taking parameters, such as substrate thickness, relationship between transmittance and work function of graphene, and n-type doing concentration of substrate semiconduction. The area with the highest efficiency for photogenerated carriers was found to be located near the interface region under light illumination. The significant enhancement of power conversion efficiency was shown in the cell with a thicker carrier absorption Si substrate layer, larger graphene work function, and average doping in a silicon substrate. Thus, for improved cell structure, the maximum JSC = 4.7 mA/cm2, VOC = 0.19 V, and fill factor = 59.73% are found under AM1.5G, exhibiting maximum efficiency of 6.5% (1 sun). The EQE of the cell is well above 60%. This work reports the influence of different substrate thickness, work function, and N-type doping on the efficiency and characteristics of graphene-based Schottky solar cells.

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“…In particular the graphene film has a unique combination of high electrical conductivity and optical transparency in visible and near-infrared regions, which gives it the ability to serve as an active layer for metal-semiconductor (M/S) junction solar cells [4]. Recently, graphene based solar cells had been fabricated on various substrates such as Si [5], CdS [6], and GaAs [7]; much process has been achieved in the past several years. Moreover graphene/semiconductor nanowires heterojunction photoelectric devices have also been achieved [8], which is combined with the unique one-dimensional (1D) structural characteristics and versatile physical properties of 1D nanowires [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Design of Graphene GaAs Junction Solar Cell

Kuang

Liu

et al. 2015

Advances in Condensed Matter Physics

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Graphene based GaAs junction solar cell is modeled and investigated by Silvaco TCAD tools. The photovoltaic behaviors have been investigated considering structure and process parameters such as substrate thickness, dependence between graphene work function and transmittance, and n-type doping concentration in GaAs. The results show that the most effective region for photo photogenerated carriers locates very close to the interface under light illumination. Comprehensive technological design for junction yields a significant improvement of power conversion efficiency from 0.772% to 2.218%. These results are in good agreement with the reported experimental work.

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Hydrothermal synthesis of graphene–CdS composites with improved photoelectric characteristics

Cited by 12 publications

References 13 publications

Performance of Graphene–CdS Hybrid Nanocomposite Thin Film for Applications in Cu(In,Ga)Se2 Solar Cell and H2 Production

Performance of Graphene–CdS Hybrid Nanocomposite Thin Film for Applications in Cu(In,Ga)Se2 Solar Cell and H2 Production

Development and Analysis of Graphene-Sheet-Based GaAs Schottky Solar Cell for Enriched Efficiency

Modeling and Design of Graphene GaAs Junction Solar Cell

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