The prototyped graphene-based solar cell improves by roughly 36 times the delivered power per weight, compared to ITO-based state-of-the-art devices. It also uses 1/200 the amount of material per unit area for the
We propose an updated design on concentrated thermionic emission solar cells, which demonstrates a high solar-to-electricity energy conversion efficiency larger than 10% under 600 suns, by...
We propose a concentrated thermionic emission solar cell design, which demonstrates a high solar-to-electricity energy conversion efficiency larger than 10% under
Photocatalysis, a promising semiconductor-based technology activated by free and eternal solar energy, has great potential for addressing environmental remediation and energy conversion challenges. Concentrated solar power (CSP) technologies, namely parabolic trough reflectors, solar power towers, parabolic dish reflectors and linear Fresnel reflectors,
To overcome these shortcomings, we develop a route for producing graphene by concentrated solar radiation using fruit peel wastes as carbon sources. The method uses both green energy (sunlight) and eco-friendly materials (fruit
We propose an updated design on concentrated thermionic emission solar cells, which demonstrates a high solar-to-electricity energy conversion efficiency larger than
An innovative solar nano-concentrator is integrated with graphene metamaterial. The combined graphene with plasmonics enhances the graphene optical absorption. An extended and flat solar cell bandwidth up to 2400 nm wavelength is achieved. It has compact size suitable for integration with solar cells at reasonable cost.
In this work, a green, facile, and rapid method was developed to prepare graphene directly from common biomass materials such as banana peels, cantaloupe peels, coconut peels, and orange peels by using concentrated solar radiation. The basic principle of this method is photothermal conversion.
We propose an updated design on concentrated thermionic emission solar cells, which demonstrates a high solar-to-electricity energy conversion efficiency larger than 10% under
Thermionic conversion, due to its simple solid-state structure capable of converting heat to electricity directly, is promising for concentrated solar power. However, because of the extremely high cathode temperature, a large portion of the heat is lost to the environment. The paper introduces a novel concept of selective thermoradiative-graphene
We propose an updated design on concentrated thermionic emission solar cells, which demonstrates a high solar-to-electricity energy conversion efficiency larger than 10% under 600 suns, by...
Thermionic (TI) energy converters can directly convert thermal energy to electrical power, with a prospect of power density of 1 MW/m 2 and efficiency of >30% (Campbell et al., 2021).TI converter can be applied to concentrated solar power (Schwede et al., 2013; Trucchi et al., 2018; Xiao et al., 2017), space nuclear power (Bennett et al., 1996; Deng et al.,
In this work, a green, facile, and rapid method was developed to prepare graphene directly from common biomass materials such as banana peels, cantaloupe peels,
We propose a concentrated thermionic emission solar cell design, which demonstrates a high solar-to-electricity energy conversion efficiency larger than 10% under 600 sun, by harnessing...
By utilizing concentrating mirrors to harness solar energy in a potential field test, a heating power of 2.5 kW would facilitate graphene synthesis, consuming less than 1 kWh of
Concentrated solar power (CSP, (302–662 °F) as it flows through the receiver and is then used as a heat source for a power generation system. [44] Trough systems are the most developed CSP technology. The Solar Energy Generating Systems (SEGS) plants in California, some of the longest-running in the world until their 2021 closure; [45] Acciona''s Nevada Solar One near
The three power densities increase linearly with solar concentration ratio and the solar cell can yield a power output density of 25.3 W/cm 2 at 1000 suns. PCEs of both the PETE sub-device and the total PETE-PV solar cell increases with solar concentration ratio for the solar concentration ratio of <500. The two PCEs keeps stable for solar concentration ratio of >500 at
To overcome these shortcomings, we develop a route for producing graphene by concentrated solar radiation using fruit peel wastes as carbon sources. The method uses both
We propose an updated design on concentrated thermionic emission solar cells, which demonstrates a high solar-to-electricity energy conversion efficiency larger than 10% under 600 suns, by...
By utilizing concentrating mirrors to harness solar energy in a potential field test, a heating power of 2.5 kW would facilitate graphene synthesis, consuming less than 1 kWh of solar...
Based on thermionic emission, thermionic energy converter (TIECs) are emerging heat-to-electric power generation systems [1–4].The conversion efficiency of TIECs can never reach Carnot efficiency due to the irreversible heat losses [].Operated at relatively high temperatures, typically over 1400 K, electrons with energies larger than the work function are
This paper is mainly focused on recent research and development of the direct steam generation (DSG) technologies using concentrated solar collectors for power generation. Further, the integrated mode of operation with other conventional thermal power plants in order to increase the cost-saving and reduce the greenhouse gas emissions are
According to the details that were provided, the present study aims to enhance the heat and exergy efficiency of parabolic trough solar collectors (PTSCs) by using a water-based hybrid nanofluid with dispersed Graphene-ZrO 2 at various volume concentrations (water, 0.05 %, 0.075 %, 0.1 %, and 0.125 %) as the working fluid.
These technologies can be applied to concentrated solar power, nuclear power generation, deep-space power generation and waste heat recovery. A thermionic (TI) converter consists of a hot cathode and a cooler anode that are arranged in parallel. Electrons with energy that can overcome the cathode work function have a chance to emit from the
To overcome these shortcomings, we develop a route for producing graphene by concentrated solar radiation using fruit peel wastes as carbon sources. The method uses both green energy (sunlight) and eco-friendly materials (fruit peels) to generate graphene at almost zero cost.
According to the details that were provided, the present study aims to enhance the heat and exergy efficiency of parabolic trough solar collectors (PTSCs) by using a water
We propose an updated design on concentrated thermionic emission solar cells, which demonstrates a high solar-to-electricity energy conversion efficiency larger than 10% under 600 suns, by harnessing the exceptional electrical, thermal, and radiative properties of the graphene as a collector electrode. By constructing an analytical
An innovative solar nano-concentrator is integrated with graphene metamaterial. The combined graphene with plasmonics enhances the graphene optical absorption. An
The detailed mechanism for production of graphene by concentrated solar radiation may be attributed to a photochemical or photothermal process or both. As we know, before picking, fruit peels are exposed to sunlight every day while remain intact. Therefore, photochemical process is hardly participated in converting fruit peels into graphene.
Further scale-up of the optimized graphene growth area was achieved by flattening the insolation profile, leading to spatial uniformity up to 13 mm in radius. Direct solar capture for CVD synthesis enable a practical and sustainable option for synthesizing graphene films applicable for photonic and electronic applications.
The product is named concentrated-solar-induced graphene (CSIG) based on the process employed to generate it. The resulting CSIG was characterized using a range of analytical techniques. The Raman spectrum of the CSIG displayed two distinct peaks corresponding to the D and G bands at ∼1343 and ∼1568 cm –1, respectively.
By utilizing concentrating mirrors to harness solar energy in a potential field test, a heating power of 2.5 kW would facilitate graphene synthesis, consuming less than 1 kWh of solar energy.
Here, we report the use of a high flux solar simulator (HFSS) that mimics the solar spectrum and a cold-wall CVD reactor to achieve graphene synthesis under variable conditions. Our process optimization utilizes a Bayesian–Gaussian surrogate model to navigate through various conditions and to optimize graphene quality.
In the future, with the aid of a solar tracker-lens system, cost-free, pollution-free, and inexhaustible solar energy can be easily exploited for mass-producing graphene materials from wastes. Fresh bananas, cantaloupes, coconuts, and oranges were purchased from a local market.
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