Photovoltaic performance of non-covalent functionalized single-layer graphene in dye-sensitized solar cells (DSSCs)

İgman, Erdal; Bayram, Özkan; Mavi, Ahmet; Hasar, Uğur Cem; Şimşek, Önder

doi:10.1007/s10853-020-05535-0

Cited by 9 publications

(5 citation statements)

References 55 publications

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“…Because the position is highly sensitive to the number of layers present in the sample, its observation allows accurate determination of layer thickness. As stated in literature studies [50][51][52][53], the 2D band is the characteristic peak of the graphene structure. It is known that the ratio I 2D /I G of the intensity I 2D and I G of the bands 2D and G is dependent on the number of graphene layers.…”

Section: Resultsmentioning

confidence: 84%

Double-exponential current-voltage (I-V) behavior of bilayer graphene-based Schottky diode

Kutluoğlu¹,

Orhan²,

Tataroğlu³

et al. 2021

Phys. Scr.

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Researches on layered materials such as graphene have attracted lots of attention recently. It has been shown that these materials have make a junction with many semiconductor materials that behave like Schottky diodes and have rectifying characteristics. The comprehension of its fabrication process and properties are a critical need toward graphene-based integrated electronics. The purpose of this study is to find out the current-voltage (I-V) performance of Bilayer Graphene (BLGr) based heterostructure fabricated on Al 2 O 3 /p-Si, and the effect of BLGr on diode parameters. Graphene has been grown on copper (Cu) foil by Chemical Vapor Deposition (CVD) method and transferred onto Al 2 O 3 /p-Si by using the polymethyl methacrylate (PMMA) wet transfer method. Raman analysis has been performed to obtain supportive information about CVD synthesized graphene film. The I-V plot of the diode exhibited two linear regions named Region 1 (0.08-0.19 V) and Region 2 (0.21-0.40 V). The doubleexponential I-V behavior of the diode has been analyzed. The diode characteristics such as barrier height (Φ B0 ), series resistance (R s ), and ideality factor (n) have been calculated by using thermionic emission (TE), Norde, and Cheung methods. Especially, the values of the barrier height were compared with one another. It was found that they are in good agreement. Additionally, current conduction mechanisms of the diode were investigated using the forward bias ln(I) versus ln (V) plot. At lower and higher forward bias regions, the conduction mechanisms were determined as ohmic behavior and trap charge limiting current mechanism (TCLC), respectively.

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Section: Resultsmentioning

confidence: 84%

Double-exponential current-voltage (I-V) behavior of bilayer graphene-based Schottky diode

Kutluoğlu¹,

Orhan²,

Tataroğlu³

et al. 2021

Phys. Scr.

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“…D, G, and 2D peaks of graphene, the carbon-based material, were extensively investigated using Raman analysis. Strong G peak and strong D peak indicate good graphitic structure, and 2D-G peak intensity ratio (I 2D /I G > 2), on the other hand, confirms monolayer graphene [19][20][21][22]40,41]. Raman analysis was preferred for the determination of the number of layers in the present work.…”

Section: Raman Analysismentioning

confidence: 77%

Antibacterial Efficiencies of CVD-PECVD Graphene Nanostructures Synthesized onto Glass and Nickel Substrates against Escherichia coli and Staphylococcus aureus Bacteria

et al. 2021

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The antibacterial activity of graphene nanostructures (GrNs) on glass (G) and nickel (Ni) substrates against Escherichia coli ATCC 35218 (Gram-negative) and Staphylococcus aureus ATCC 25923 (Gram-positive) has been researched in this study. GrNs have been synthesized via two different methods, namely, chemical vapor deposition (CVD) and plasma enhanced chemical vapor deposition (PECVD). While the antibacterial effect of CVD-grown graphene nanosheets has been examined according to the number of layers (monolayer/1–2 layers/2–3 layers), the effect of PECVD grown Gr nanowalls on G substrates has been also analyzed at 100, 150, and 200 W radio frequency (RF) powers. For CVD-grown graphene nanosheets, as the number of layers of graphene nanosheets decreased, the cell viability (%) of E. coli decreased from 100% to 51.4%. It has been shown that PECVD graphene nanowalls synthesized onto G substrates, especially at 200 W, exhibited stronger antibacterial activity against E. coli and S. aureus, and the cell viabilities of E. coli and S. aureus decreased from 100% to 25.19% and 100% to 9.02%, respectively. It is concluded that that both the nanowall (3D structure) morphology, which changes significantly with the presence of RF power, and the defects created on the graphene surface using the PECVD method are more effective against E. coli and S. aureus than CVD-grown graphene-based samples (2D-structure).

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“…Table 9 provides a categorized list of the main precursors used for polymer film growth, distinguishing between monomeric and non-monomeric substances. Methyl methacrylate [113] ; styrene [263] ; 2-methyl-1,3-butadiene (isoprene) [264] ; Vinyltriethoxysilane [265] Aromatic monomers Pyrrole [266] ; Thiophene [267] ; Aniline [268] Acrylate monomers 1H,1H,2H,2H-perfluorododecyl acrylate (PFDA) [269] ; Dodecylacrylate (DOCA) [269] ; Lauryl methacrylate (LMA) [270] Fluorinated monomers (Carbon-fluorine bonds)…”

Section: From Molecular Precursors In the Gas Phase To The Synthesis ...mentioning

confidence: 99%

“…Methyl methacrylate [113]; styrene [262]; 2-methyl-1,3-butadiene (isoprene) [263]; Vinyltriethoxysilane [264] Aromatic monomers Pyrrole [265]; Thiophene [266]; Aniline [267] Acrylate monomers 1H,1H,2H,2H-perfluorododecyl acrylate (PFDA) [268]; Dodecylacrylate (DOCA) [268]; Lauryl methacrylate (LMA) [269] Fluorinated monomers (Carbon-fluorine bonds)…”

Section: Monomersmentioning

confidence: 99%

From Basics to Frontiers: A Comprehensive Review of Plasma-Modified and Plasma-Synthesized Polymer Films

Dufour

2023

Polymers

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This comprehensive review begins by tracing the historical development and progress of cold plasma technology as an innovative approach to polymer engineering. The study emphasizes the versatility of cold plasma derived from a variety of sources including low-pressure glow discharges (e.g., radiofrequency capacitively coupled plasmas) and atmospheric pressure plasmas (e.g., dielectric barrier devices, piezoelectric plasmas). It critically examines key operational parameters such as reduced electric field, pressure, discharge type, gas type and flow rate, substrate temperature, gap, and how these variables affect the properties of the synthesized or modified polymers. This review also discusses the application of cold plasma in polymer surface modification, underscoring how changes in surface properties (e.g., wettability, adhesion, biocompatibility) can be achieved by controlling various surface processes (etching, roughening, crosslinking, functionalization, crystallinity). A detailed examination of Plasma-Enhanced Chemical Vapor Deposition (PECVD) reveals its efficacy in producing thin polymeric films from an array of precursors. Yasuda’s models, Rapid Step-Growth Polymerization (RSGP) and Competitive Ablation Polymerization (CAP), are explained as fundamental mechanisms underpinning plasma-assisted deposition and polymerization processes. Then, the wide array of applications of cold plasma technology is explored, from the biomedical field, where it is used in creating smart drug delivery systems and biodegradable polymer implants, to its role in enhancing the performance of membrane-based filtration systems crucial for water purification, gas separation, and energy production. It investigates the potential for improving the properties of bioplastics and the exciting prospects for developing self-healing materials using this technology.

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Photovoltaic performance of non-covalent functionalized single-layer graphene in dye-sensitized solar cells (DSSCs)

Cited by 9 publications

References 55 publications

Double-exponential current-voltage (I-V) behavior of bilayer graphene-based Schottky diode

Double-exponential current-voltage (I-V) behavior of bilayer graphene-based Schottky diode

Antibacterial Efficiencies of CVD-PECVD Graphene Nanostructures Synthesized onto Glass and Nickel Substrates against Escherichia coli and Staphylococcus aureus Bacteria

From Basics to Frontiers: A Comprehensive Review of Plasma-Modified and Plasma-Synthesized Polymer Films

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