How does graphene enhance the photoelectric conversion efficiency of dye sensitized solar cells? An insight from a theoretical perspective

Xi, Jian-Ying; Jia, Ran; Li, Wei; Wang, Jian; Bai, Fu‐Quan; Eglitis, R. I.; Zhang, Hongxing

doi:10.1039/c8ta06872k

Cited by 28 publications

(15 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Black dots: raw data; red curve: fit; blue and green curves: doublet component. The single component located at 459.3 eV, is in agreement with the expected position for titanium in TiO 2 (Ti-C bond is not detected) [25]. Ar ref.…”

Section: Growth and Morphology Of Graphitic Structures On Tio 2 (110)supporting

confidence: 84%

“…However, the initial stages of carbon nucleation and growth direction of the carbon phase on the TiO 2 substrate are aspects not assessed in these works. In close relation to this, a recent theoretical report [25] depicted a scenario in which vertical arrangement of mesoscopic graphene sheets on the substrate may enhance charge separation properties. This work emphasizes the need of "vertical" or columnar growth with interfacial chemical bonds for more efficient charge transfer processes in comparison with graphene-TiO 2 flat heterostructures (often referred to as "van der Waals") with clear interface and physical contact.…”

Section: Introductionsupporting

confidence: 57%

See 1 more Smart Citation

Tailored graphenic structures directly grown on titanium oxide boost the interfacial charge transfer

Muñoz

Sánchez‐Sánchez

Merino

et al. 2020

Applied Surface Science

View full text Add to dashboard Cite

Highlights Tailored graphenic structures, dots rods and continuous films, were successfully fabricated directly on TiO 2 substrates using an extremely clean synthesis protocol by Plasma Assisted Chemical Vapor Deposition. Chemical analysis demonstrates undoubtedly the formation of Ti-O-C bonds in the interface of carbon-TiO 2 hybrid materials. High photocurrent density is generated upon illumination through the carbon-TiO 2 contact proving an efficient charge transfer. AbstractThe successful application of titanium oxide-graphene hybrids in the fields of photocatalysis, photovoltaics and photodetection strongly depends on the interfacial contact between both materials. The need to provide a good coupling between the enabling conductor and the photoactive phase prompted us to directly grow conducting graphenic structures on TiO 2 crystals. We here report on the direct synthesis of tailored graphenic structures by using Plasma Assisted Chemical Vapour Deposition that present a clean junction with the prototypical titanium oxide (110) surface. Chemical analysis of the interface indicates chemical bonding between both materials. Photocurrent measurements under UV light illumination manifest that the charge transfer across the interface is efficient. Moreover, the influence of the synthesis atmosphere, gas precursor (C 2 H 2 ) and diluents (Ar, O 2 ), on the interface and on the structure of the as-grown graphenic material is assessed. The inclusion of O 2 promotes vertical growth of partially oxidized carbon nanodots/rods with controllable height and density. The deposition with Ar results in continuous graphenic films with low resistivity (ρ=6.8·10 -6 Ω·m). The synthesis protocols developed here are suitable to produce tailored carbonsemiconductor structures on a variety of practical substrates as thin films, pillars or nanoparticles.

show abstract

Section: Growth and Morphology Of Graphitic Structures On Tio 2 (110)supporting

confidence: 84%

Section: Introductionsupporting

confidence: 57%

Tailored graphenic structures directly grown on titanium oxide boost the interfacial charge transfer

Muñoz

Sánchez‐Sánchez

Merino

et al. 2020

Applied Surface Science

View full text Add to dashboard Cite

show abstract

“…18,19 Among various carbon materials, graphene nanosheets are ideal support that boost the electrical conductivity and catalytic activity of prospective catalysts. [20][21][22][23] Previously, we also proved that owing to their mesoporous structure and hollow-hybrid nanostructure, CEs composed of nickel selenides on graphene remarkably improve the electrocatalytic performance of DSSCs. 24,25 Specic synthesis methods can engineer the thermodynamic and dynamic parameters during nucleation and growth of nanomaterials, breaking their customary nanostructures and dimensions.…”

Section: Introductionmentioning

confidence: 99%

Ultralong NiSe nanowire anchored on graphene nanosheets for enhanced electrocatalytic performance of triiodide reduction

Yang

Zhang

2021

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…Composites and hybrid structures, as well as nanoobjects based on graphene, has attracted huge attention in experimental and theoretical studies during the last decade [16][17][18][19][20][21][22] after this material was discovered in 2004 by Novoselov and Geim [23]. The decoration of graphene with metals (e.g., Fe [24], Pt [25,26], Pd [27]), as well as organic (e.g., tetracyanoethylene [28]) and inorganic compounds (e.g., Bi 2 O 3 [29]), could improve electrocatalytic adsorption and gas sensing properties toward different gases Different graphene-based catalysts for direct electrochemical CO 2 reduction were reported in the literature, e.g., atomic Fe dispersed on nitrogen-doped graphene [30], Bdoped graphene [31], N-doped graphene [32], defective graphene produced by a nitrogen removal procedure from N-doped graphene [33], Ni-decorated graphene [34], Co 3 O 4 spinel nanocubes on N-doped graphene [35], etc.…”

Section: Introductionmentioning

confidence: 99%

CO2 and CH2 Adsorption on Copper-Decorated Graphene: Predictions from First Principle Calculations

et al. 2022

View full text Add to dashboard Cite

Single-layer graphene decorated with monodisperse copper nanoparticles can support the size and mass-dependent catalysis of the selective electrochemical reduction of CO2 to ethylene (C2H4). In this study, various active adsorption sites of nanostructured Cu-decorated graphene have been calculated by using density functional theory to provide insight into its catalytic activity toward carbon dioxide electroreduction. Based on the results of our calculations, an enhanced adsorption of the CO2 molecule and CH2 counterpart placed atop of Cu-decorated graphene compared to adsorption at pristine Cu metal surfaces was predicted. This approach explains experimental observations for carbon-based catalysts that were found to be promising for the two-electron reduction reaction of CO2 to CO and, further, to ethylene. Active adsorption sites that lead to a better catalytic activity of Cu-decorated graphene, with respect to general copper catalysts, were identified. The atomic configuration of the most selective CO2 toward the reduction reaction nanostructured catalyst is suggested.

show abstract

How does graphene enhance the photoelectric conversion efficiency of dye sensitized solar cells? An insight from a theoretical perspective

Abstract: Theoretical investigation reveals how graphene enhances the photoelectric conversion efficiency of a DSSC.

Cited by 28 publications

References 54 publications

Tailored graphenic structures directly grown on titanium oxide boost the interfacial charge transfer

Tailored graphenic structures directly grown on titanium oxide boost the interfacial charge transfer

Ultralong NiSe nanowire anchored on graphene nanosheets for enhanced electrocatalytic performance of triiodide reduction

CO2 and CH2 Adsorption on Copper-Decorated Graphene: Predictions from First Principle Calculations

Contact Info

Product

Resources

About