Promoting Effect of Graphene on Dye-Sensitized Solar Cells

Wang, Hui; Leonard, Samantha L.; Hu, Yun Hang

doi:10.1021/ie300563h

Cited by 101 publications

(85 citation statements)

References 68 publications

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“…It is worth mentioning that a few of these inorganic materials have already been proven to possess excellent electrocatalytic activity for the triiodide reduction reaction, and a few of them still deserve to be investigated further. To the best of our knowledge, no specific theoretical investigation is available for certain classes of materials, including phosphides, 126 selenides, 127 tellurides, 128 carbon, [129][130][131][132][133][134] polymer 135 and hybrids, 136 which are experimentally proven to be active for the triiodide reduction reaction. The authors believe that a comprehensive theoretical model should be developed to categorize a wide variety of materials in a more efficient way.…”

Section: Doped Metal Oxidesmentioning

confidence: 99%

The search for efficient electrocatalysts as counter electrode materials for dye-sensitized solar cells: mechanistic study, material screening and experimental validation

et al. 2015

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In recent years, there has been a significant increase in the studies on effective energy-conversion devices, including photovoltaics and fuel cells, which aim to alleviate the enormous energy demand, as well as the environmental pollution issues associated with current power consumption. Among these devices, dye-sensitized solar cells (DSCs) have received significant attention owing to their simple fabrication procedure, cost-effectiveness and high-power-conversion efficiency. The counter electrode (CE) of the DSCs is an important component and generally uses platinum as its benchmark material, the high cost and scarcity of which have limited the broad application of the DSCs. Thus, substantial effort has been devoted to seek active CE materials with low cost, high electrocatalytic activity and excellent stability. Nevertheless, this is generally achieved via a 'trial-and-error' method owing to the lack of information on the mechanism of the electrocatalytic reaction on the CE's surface. This report summarizes the recent advances in the mechanistic study of the interfacial electrocatalytic reaction on CE materials, as well as the establishment of a rational screening protocol for efficient CE materials. Furthermore, several outstanding CE materials developed via this protocol have been reviewed. The demonstrated combined approach can be extended to the studies of other essential electrocatalytic reactions. NPG Asia Materials (2015) 7, e226; doi:10.1038/am.2015.121; published online 20 November 2015 INTRODUCTIONThe global demand for energy has significantly increased, and this trend is predicted to continue in the future. Solar energy, which is one of the most abundant and least-utilized clean energy sources, demonstrates great potential to satisfy the future global energy consumption. A photovoltaic (PV) system or solar cell, which directly converts sunlight into electricity, has attracted significant attention in the academic and industrial fields. Although the current PV market is dominated by silicon-based solar cells, several studies have been performed to develop new-generation solar cells with a higher efficiency and a lower price. Among them, dye-sensitized solar cells (DSCs) exhibit a promising future owing to their ease of fabrication, low-cost and high sunlight-harvesting efficiency. [1][2][3][4] In typical single p-n junction PV devices, semiconducting materials are used to generate, separate and transport charge carriers (electrons and holes) to transmit electricity under solar illumination. However, in the DSCs, photoelectrons are generated by separate photosensitive dyes and

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Section: Doped Metal Oxidesmentioning

confidence: 99%

The search for efficient electrocatalysts as counter electrode materials for dye-sensitized solar cells: mechanistic study, material screening and experimental validation

et al. 2015

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“…The DSSC with the SnS CE produced a PCE of 6.02% (V oc = 768 mV, J sc = 14.09 mA Á cm À2 , FF = 55.63%). As is well known, graphene has some specifically important properties such as high electrical conductivity, great mechanical strength and structural flexibility [18,[30][31][32][33][34][35]. On incorporating graphene, the short circuit current increased from about 14 mAÁcm À2 to 15.7 mAÁcm À2 and the fill factor increased from 55.63% to 61.75%, resulting in a higher PCE value of 7.47% using a SnS/RGO nanocomposite CE [36].…”

Section: Materials Characterizations With Xrd Sem and Temmentioning

confidence: 99%

Structural Phase Transition from Tin (IV) Sulfide to Tin (II) Sulfide and the enhanced Performance by Introducing Graphene in Dye-sensitized Solar Cells

Yang

Chen

Zuo

et al. 2015

Electrochimica Acta

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“…Hence, it is no surprise that graphene materials have quickly made their entry into DSSC applications, having been incorporated into each aspect of a DSSC (Figure 9.9). They were first used in 2008 as a transparent electrode to replace fluorine doped tin oxide (FTO) at the photoanode 291 and have since been used, for example, with the purpose of harvesting light, 292 improving transport through both the titania layer [293][294][295] and the electrolyte, 276,296 and superseding platinum at the cathode. 268,297…”

Section: Carbon (Nano)materials For Solar Cellsmentioning

confidence: 99%

Nanostructured Carbon Materials for Energy Conversion and Storage

2015

Nanostructured Carbon Materials for Catalysis

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Systems for electrochemical energy storage and conversion include batteries, fuel cells, and electrochemical capacitors. Although the energy storage and conversion mechanisms are different, there are a few similarities between these three systems. Common features include the energy-transfer processes taking place at the phase boundary of the electrode/electrolyte interface and electron and ion transport being separated. Batteries, fuel cells, and super-capacitors all consist of two electrodes in contact with an electrolyte solution. In batteries and fuel cells, electrical energy is generated by conversion of chemical energy via redox reactions at the anode and cathode. As reactions at the anode usually take place at lower electrode potentials than at the cathode, the terms negative and positive electrode (indicated as minus and plus poles) are used. The more negative electrode is designated the anode, whereas the cathode is the more positive one. The difference between batteries and fuel cells is related to the locations of energy storage and conversion. Batteries are closed systems, with the anode and cathode being the charge-transfer medium and taking an active role in the redox reaction as "active masses". In other words, energy storage and conversion occur in the same compartment. Fuel cells are open systems where the anode and cathode are just charge-transfer media and the active masses undergoing the redox reaction are delivered from outside the cell, either from the environment (e.g. oxygen from air), or from a tank (e.g. hydrogen and hydrocarbons).

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Promoting Effect of Graphene on Dye-Sensitized Solar Cells

Cited by 101 publications

References 68 publications

The search for efficient electrocatalysts as counter electrode materials for dye-sensitized solar cells: mechanistic study, material screening and experimental validation

The search for efficient electrocatalysts as counter electrode materials for dye-sensitized solar cells: mechanistic study, material screening and experimental validation

Structural Phase Transition from Tin (IV) Sulfide to Tin (II) Sulfide and the enhanced Performance by Introducing Graphene in Dye-sensitized Solar Cells

Nanostructured Carbon Materials for Energy Conversion and Storage

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