Graphene-Based Materials for Photoanodes in Dye-Sensitized Solar Cells

Guo, Xiaoru; Lu, Ganhua; Chen, Junhong

doi:10.3389/fenrg.2015.00050

Cited by 57 publications

(35 citation statements)

References 133 publications

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“…The electrocatalytic activity of MoS 2 /graphene hybrids were first investigated in DSSCs. DSSCs have a sandwich structure with a sensitizing material-coated semiconducting layer as the photoanode, a pair of redox as the electrolyte, and a reducing catalyst as the counter electrode [ 50 ]. DSSCs have separate photoanode and counter electrode, which creates an opportunity to maximize the counter electrode catalyst without breaking the cell chemistry.…”

Section: Resultsmentioning

confidence: 99%

Temperature-dependent Crystallization of MoS2 Nanoflakes on Graphene Nanosheets for Electrocatalysis

et al. 2017

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This work primarily studies the crystallization condition of molybdenum disulfide (MoS2) in MoS2/graphene hybrids by a temperature-varying hydrothermal method from 150 to 240 °C. Flower-like MoS2 nanoflakes were successfully grown on graphene nanosheets and characterized to understand the temperature-dependent crystallization process and the electrochemical performance. The highest electrocatalytic efficiency for both the dye-sensitized solar cell and the hydrogen evolution reaction was obtained by preparing the hybrid at 180 °C, which benefits from balanced high reactivity and high conductivity. This research leads to a better understanding of temperature dependence of MoS2 crystallization and offers guidelines for better catalytic material design. Graphical abstractTemperature-dependent Crystallization of MoS2 Nanoflakes on Graphene Nanosheets for Electrocatalysis Electronic supplementary materialThe online version of this article (doi:10.1186/s11671-017-2248-9) contains supplementary material, which is available to authorized users.

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Section: Resultsmentioning

confidence: 99%

Temperature-dependent Crystallization of MoS2 Nanoflakes on Graphene Nanosheets for Electrocatalysis

et al. 2017

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“…This research is focusing on investigating the optical properties of graphene-TiO2 nanocomposites film for DSSC application. Based on the FESEM result, increasing concentration of graphene has provided larger surface area compared to pure TiO2 [14,15]. Incorporation of graphene into TiO2 also enhanced the optical properties of Graphene-TiO2nanocomposites by shifting the fundamental absorption edge toward the longer wavelength [13].…”

Section: Introductionmentioning

confidence: 99%

“…Photoanode which is one of the main components in DSSC plays a significant role in the separation and transportation of electrons [6,12]. Much of research has been done to improve the properties of photoanode, such as modifying the photoanode by adding additive like graphene [13,14]. Graphene is one of the promising carbon materials as it shows some spectacular and unique potential compared to other materials such as activated carbon.…”

Section: Introductionmentioning

confidence: 99%

“…Among them, the two most popular are by reduction of Graphene Oxide (GO) and through Chemical Vapor Deposition (CVD) because these methods are cost effective, easy to handle and suitable for large-scale production [14]. Graphene is known as carbonaceous material with a single layer that provides a faster electron transfer path, reduces the electron-hole recombination rate in TiO2layer and produce large surface area [14,16]. These unique characteristics of graphene make it usable as additive in TiO2photoanodes to enhance electron mobility and further improve DSSC performance.…”

Section: Introductionmentioning

confidence: 99%

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Study on Optical Properties of Graphene-Tio2 Nanocomposite as Photoanodes Layer in Dye Sensitized Solar Cell (Dssc)

Zulkapli¹,

Rashid²,

Sokri³

et al. 2018

Environ. ecosyst. sci.

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Dye Sensitized Solar Cell (DSSC) using titanium dioxide (TiO2) has begun to play a significant role in future solar energy since it is known as cost effective and highly efficient. DSSC is the third generation of photovoltaic cells that have been widely investigated as a promising replacement of current commercial solar cell. However, the highest efficiency of DSSC still has not achieved the minimum requirement so that it can be commercialize. Much research has been done to improve DSSC performance by focusing on photoanodes layer. In this study, graphene was employed into TiO2photoanode to increase the efficiency and to enhance the performance of dye sensitized solar cell. Four different samples of nanocomposites paste were prepared by varying the graphene composition of 0.00, 0.30, 0.50 and 0.70 wt%. The prepared samples were coated on Fluorine-Doped Tin Oxide (FTO) conductive glass substrates by a doctor blade method and annealed at 450 o C for 30 minutes. The morphology and structure of the graphene-TiO2 nanocomposites layer were characterized by using Field Emission Scanning Electron Microscope (FESEM). The optical properties were studied by using UV-visible spectroscopy. Based on the result show that addition of graphene into TiO2 have provide larger surface area compared to pure TiO2. The optical properties of Graphene-TiO2 nanocomposites also improved as the fundamental of absorption edge has shifted toward longer wavelength and reduce the optical band gap.

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“…Graphene is a two-dimensional monolayer of carbon atoms densely packed in a honeycomb crystal lattice [23]. As a promising material for next-generation energy storage and conversion devices, graphene has attracted tremendous attention because of its superior properties [24][25][26][27]. Graphene exhibits a unique two-fold advantage with remarkably high electron mobility at room temperature and fast heterogeneous electron transfer at the edges.…”

Section: Introductionmentioning

confidence: 99%

Silver Decorated Reduced Graphene Oxide as Electrocatalyst for Zinc–Air Batteries

et al. 2020

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Due to their low cost and very high energy density, zinc-air batteries (ZABs) exhibit high potential for various energy applications. The electrochemical performance of the air-cathode has a decisive impact on the discharge performance of ZABs because the sluggish oxygen reduction reaction (ORR) kinetics increase the overpotential of the air-cathode and hence the performance of ZABs. In this work, reduced graphene oxide decorated with silver nanoparticles (AgNP/rGO) is synthesized using simultaneous reduction of graphene oxide and silver ions. Different amounts of silver loading are examined for the synthesis of AgNP/rGO. The synthesized AgNP/rGO samples are analyzed using a rotating disk electrode in order to investigate ORR activity. Then, the synthesized AgNP/rGO electrocatalyst is applied on a tubular designed zinc-air battery in order to study the performance of the zinc-air battery. Results demonstrate that AgNP/rGO is an efficient and cost-effective ORR electrocatalyst for its practical application in ZABs.

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Graphene-Based Materials for Photoanodes in Dye-Sensitized Solar Cells

Cited by 57 publications

References 133 publications

Temperature-dependent Crystallization of MoS2 Nanoflakes on Graphene Nanosheets for Electrocatalysis

Temperature-dependent Crystallization of MoS2 Nanoflakes on Graphene Nanosheets for Electrocatalysis

Study on Optical Properties of Graphene-Tio2 Nanocomposite as Photoanodes Layer in Dye Sensitized Solar Cell (Dssc)

Silver Decorated Reduced Graphene Oxide as Electrocatalyst for Zinc–Air Batteries

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