Layer dependency of graphene layers in perovskite/graphene solar cells

Ishikawa, Ryousuke; Yamazaki, Sohei; Watanabe, Sho; Tsuboi, Nobuyuki

doi:10.1016/j.carbon.2020.10.065

Cited by 34 publications

(16 citation statements)

References 33 publications

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“…In addition to their utilization as electrode materials in energy storage devices, graphene is also applicable for energy conversion as well as energy generation purposes. ,,, In devices like fuel cells (FCs) and dye-sensitized solar cells (DSSCs), graphene plays an important role in the efficient conversion of chemical/solar energies into electrical energy. In FCs, graphene derivatives were suitably applied for decreasing the loading of Pt-based catalysts, as a catalyst support/standalone catalyst, or as an electrolyte membrane with the similar performances to that of other materials. − In the case of dye-synthesized solar cells, graphene derivatives were found to be improving the efficiency as well as stability of DSSCs by employment at the photoanode, electrolyte, and the counter electrode. − As these energy converting/harvesting devices utilize the expensive and limited Pt-based catalysts, the use of graphene derivatives as an alternative as well as supportive material not only reduces the cost but also acts as a viable replacement with accepted performance and stability.…”

Section: Energy Applications Of the Synthesized Graphene Derivativesmentioning

confidence: 99%

Graphene/Graphene Derivatives from Coal, Biomass, and Wastes: Synthesis, Energy Applications, and Perspectives

2022

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In the last decade, there has been a phenomenal development in the commercially viable, large-scale synthesis of graphene, a multifunctional advanced carbon nanomaterial, which is gaining popularity for its diverse range of applications, especially in energy storage, composites, sensors, and membranes. With the increasing demand, a large number of worldwide research efforts have been employed, resulting in a series of enormous breakthroughs both in its fundamental science and innovative applications. The earlier reviews on graphene show that the increase in the production yield is often accompanied by the generation of substandard graphene quality, making the process unsuited for commercialization. However, recent studies on graphene synthesis have shown the use of naturally available carbonaceous sources for the production of low-cost graphene derivatives is becoming an emerging trend in graphene research. In this present review, the most recent advances in the synthesis of high-quality graphene from solid carbon precursors, particularly abundant coal, biomass, and waste materials, have been extensively discussed along with their potential scalability for commercial production. The quality and yield of these graphene derivatives synthesized through different methods like chemical vapor deposition, exfoliation, laser-induced, microwave irradiation, and chemical methods are also examined to determine the best-suited synthetic methodology from the available literature. The utilization of graphene derivatives in the energy sector was further discussed, particularly in the emerging field of energy storage. Finally, the challenges and future prospects of this study are highlighted to have a better understanding of the current graphene production scenario, with an insight into the most efficient method for synthesizing high-purity low-cost graphene and their potential for scaleup and energy applications in the distant future.

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Section: Energy Applications Of the Synthesized Graphene Derivativesmentioning

confidence: 99%

Graphene/Graphene Derivatives from Coal, Biomass, and Wastes: Synthesis, Energy Applications, and Perspectives

2022

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“…e europium sorption isotherms as a function of time were developed by estimating the concentration of europium nitrate retained in tausonite at different contact times (1,2,3,4,5,7,16,18,20,22,24, and 48 h). Sorption kinetics were modelled using pseudo-order expressions (0.5 ≤ n ≤ 2), based on the reduced Van't Hoff equation (see equation (1)) and compared with empirical pseudo-first-order model (Lagergren and Elovich equation), pseudo-second-order, and intraparticle diffusion.…”

Section: Sorption Kinetics Modellingmentioning

confidence: 99%

“…Perovskites are crystalline metal oxides with the general formula ABO 3 , in which A can be rare earth (mainly lanthanides) or an alkali or alkaline earth metal and B is a transition metal [1,2]. ese oxides are excellent light absorbers and their properties include tunable band gaps, low exciton binding energy, high carrier mobility, long diffusion length, and so on [3], and, also, they have a narrow band gap (semiconductor), for which they could be considered as good candidates for thermoelectric generators [4,5]. Among the different structures of perovskites, those of the ATiO 3 type (A � Ca, Ba, Sr, etc.)…”

Section: Introductionmentioning

confidence: 99%

Prediction of Europium Retention in Perovskite: Potential Candidates for an Engineering Barrier in the Disposal of Radioactive Waste

Ortiz-Oliveros

Espinosa

Ávila-Pérez

et al. 2021

Journal of Chemistry

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Perovskites, such as tausonite, are crystalline metal oxides with excellent optical and photocatalytic properties and have also been used successfully in the retention of metals, simulating the isotopes of uranium and plutonium. In this work, different pseudo-order and thermodynamic models were studied to achieve the prediction of the sorption of Eu3+ (chemical analogous for actinides) in tausonite. The effects of gamma irradiation and temperature on the structural characteristics of the material were determined, as an additional step in the evaluation of material as an engineering barrier in the disposal of radioactive waste. The results obtained show that the tausonite is resistant to the gamma irradiation and thermal energy. Likewise, it was possible to determine that europium sorption occurs through an exothermic and spontaneous reaction, as well as through the formation of surface complexes, where Eu3+ ions bind to sites on the tausonite by dipole-dipole interaction. Furthermore, it was shown that the sorption mechanism is influenced by diffusive phenomena, which participate in the formation of surface complexes. Additionally, a new sorption model with respect to pH was proposed, which allowed determining the physical parameter π. The evidence obtained suggests that π is a physical parameter that relates pH to an optimal value and could explain the equilibrium between the surface complexes that tausonite forms with europium. Likewise, the evidence suggests that 50 kg of tausonite would have the capacity to retain at least 26.59 g of alpha-emitting radionuclides, equivalent to a waste package (900 kg) with a maximum activity of 4000 Bq/g.

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“…Particularly, graphene, known as the first invented 2D material, has attracted extensive attention for many applications [44]. Its unique mechanical characteristics, electronic structures and optical properties make it applicable in fields such as solar cells, LED transistors, sensors and catalysts [45][46][47][48]. More importantly, the properties of 2D materials can be easily tuned via doping atoms, hybridizing with other nanostructures, surface engineering and defect generation, further improving their electronic properties and catalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Recent Progress in Two-Dimensional Materials for Electrocatalytic CO2 Reduction

Lou

2022

Catalysts

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Electrocatalytic CO2 reduction (ECR) is an attractive approach to convert atmospheric CO2 to value-added chemicals and fuels. However, this process is still hindered by sluggish CO2 reaction kinetics and the lack of efficient electrocatalysts. Therefore, new strategies for electrocatalyst design should be developed to solve these problems. Two-dimensional (2D) materials possess great potential in ECR because of their unique electronic and structural properties, excellent electrical conductivity, high atomic utilization and high specific surface area. In this review, we summarize the recent progress on 2D electrocatalysts applied in ECR. We first give a brief description of ECR fundamentals and then discuss in detail the development of different types of 2D electrocatalysts for ECR, including metal, graphene-based materials, transition metal dichalcogenides (TMDs), metal–organic frameworks (MOFs), metal oxide nanosheets and 2D materials incorporated with single atoms as single-atom catalysts (SACs). Metals, such as Ag, Cu, Au, Pt and Pd, graphene-based materials, metal-doped nitric carbide, TMDs and MOFs can mostly only produce CO with a Faradic efficiencies (FE) of 80~90%. Particularly, SACs can exhibit FEs of CO higher than 90%. Metal oxides and graphene-based materials can produce HCOOH, but the FEs are generally lower than that of CO. Only Cu-based materials can produce high carbon products such as C2H4 but they have low product selectivity. It was proposed that the design and synthesis of novel 2D materials for ECR should be based on thorough understanding of the reaction mechanism through combined theoretical prediction with experimental study, especially in situ characterization techniques. The gap between laboratory synthesis and large-scale production of 2D materials also needs to be closed for commercial applications.

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Layer dependency of graphene layers in perovskite/graphene solar cells

Cited by 34 publications

References 33 publications

Graphene/Graphene Derivatives from Coal, Biomass, and Wastes: Synthesis, Energy Applications, and Perspectives

Graphene/Graphene Derivatives from Coal, Biomass, and Wastes: Synthesis, Energy Applications, and Perspectives

Prediction of Europium Retention in Perovskite: Potential Candidates for an Engineering Barrier in the Disposal of Radioactive Waste

Recent Progress in Two-Dimensional Materials for Electrocatalytic CO2 Reduction

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