The absorption of the nanocomposites consisting of cir-coronene graphene quantum dot (GQD) and tetraphenylporphyrin (TPP) as a sensitizer of the solar cell is investigated by using the first-principles density functional theory (DFT) and the time-dependent DFT. In addition, graphene has a low coefficient of light absorption 2.3% which indicates that is an almost completely transparent material. The thermal conductivity results show that hybrid nanofluid showed high thermal conductivity than single nanofluids. Monolith of ultrafine metal nanoparticles dispersed on porous graphene is directly fabricated via laser conversion of MOF crystals in air. The very broad spectral and angular responses of the absorber are ideal for solar thermal applications, as we illustrate by showing heating to 160 °C in natural sunlight. Developing graphene for flexible easy to manufacture and affordable photovoltaic applications Dr. Mae-Wan Ho. The photovoltage was larger when the laser illumination was directly incident on the graphene side compared to the SU8 … Graphene based GaAs junction solar cell is modeled and investigated by Silvaco TCAD tools. In solar-assisted steam generators, simultaneously realizing high sunlight absorption and water transportation is a significant challenge. The analysis is conducted on the components of the proposed structure to understand the origin of wideband absorption. NRGO was combined with … Perovskite solar cells (PSCs) have made great strides over the last few years due to their interesting bandgap and absorption properties that produce high PCEs. The photovoltaic behaviors have been investigated considering structure and process parameters such as substrate thickness, dependence between graphene work function and transmittance, and n-type doping concentration in GaAs. Academia.edu is a platform for academics to share research papers. This improvement in performance is associated with an increase … applications. Graphene has also been intensively researched in the area of solar cells, primarily as an active material in light absorption or energy conversion and as a transparent or a distributed electrode material that would allow light to pass through but maintain the conductivity. In fact, it means that solar cells based on graphene can significantly expand the absorbed spectrum wavelengths of electromagnetic radiation. This monolith exhibited high light absorptivity above 99% across the solar spectrum, ascribing to synergetic light absorption within cavities of dense metal nanoparticle arrays. The proposed structure offers a wideband absorption response, where absorption of > 70% is gained for the frequency ranging from 537.91 to 635.73 THz. Even though it was already speculated that graphene holds potential for solar cells, it now turns out that it is even more suitable than expected.” Although there are some issues for direct applications, such as graphene’s low absorption, the new material holds the potential to cause radical changes in many technologies that are currently based on conventional semiconductors. An enhancement in thermal conductivity of 11.3% has been obtained at 20 °C for 0.3 g/L graphene-coated [email protected]@Ag nanofluids and 16% enhancement for the same volume fraction at 50 °C. A key process in getting electricity from light is the creation of excited electron-hole pairs of charge carriers on the absorption of light. The SGM absorbers exhibit superior solar selective and omnidirectional absorption, flexible tunability of wavelength selective absorption, excellent photothermal performance, and high thermal stability. Low optical absorptivity of graphene limits the quantum efficiency of graphene-based optoelectronic devices. Efficient solar-thermal energy conversion is essential for the harvesting and transformation of abundant solar energy, leading to the exploration and design of efficient solar-thermal materials. Carbon-based materials, especially graphene, have the advantages of broadband absorption and excellent photothermal properties, and hold promise for solar-thermal energy conversion. Therefore, the efficiency of conversion of solar energy with graphene+TiO 2 to electricity were increased from 1.45 % to 3.98 %, and the efficiency of conversion of solar energy with TiO 2 /graphene/TiO 2 sandwich structure to electricity was increased from 1.38 % to 3.93 %, respectively, under simulated full-sun illumination. We demonstrate a broadband enhancement of absorptivity in an architecture of graphene intercalation inside a simple-cubic woodpile photonic crystal. Graphene-heterojunction solar cells are definitely the most extensively studied and used graphene-based solar cell. A multilayer structure is necessary given that a single graphene layer has a light absorption rate of only 2.3 percent. The structures of the separate GQD, TPP, and their nanocomposites are optimized by hybrid DFT. Optical absorption and short-circuit current density of the graphene cells showed, respectively, enhancements of 18 and 1.7 times when optimizations were done with respect to width and the grating period. It can be seen from the transmittance spectra that nanofluids capture almost incident light and from the reflectance that synthesized materials absorbed more than 97.5% and 96% of the irradiated solar power. The solar absorption efficiency of water as a base-fluid can be significantly improved by suspending nanoparticles of various materials in it. The solar absorption coefficient of graphene nanofluid is enhanced 2.9 times by the core-shell nanoparticles. 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