For wireless laser transmission, there are several main types of losses that can occur during wireless laser transmission: absorption, reflection, scattering and so on. Some key elements that makeup a laser receiving subsystem include: laser power converted, thermal management, energy management etc. The energy generated by the power converter is
Enabled by the synergetic of surface plasmon resonances and Fabry-Pérot resonances, the TCCM simultaneously achieves high absorptivity (exceed 90%), and absorption broadband
The simulation results show that the solar radiation energy spectrum in the AM1.5 band almost coincides with the absorption energy spectrum, and the absorber has a high absorption rate in this band (the average absorption rate, A, from 300 nm to 2500 nm is as high as 98.47%), which confirms that our design for this solar absorber
In 2023, Liu et al. proposed an ultra-wideband perfect absorber based on titanium nitride (TiN), with an average absorption rate of up to 96.7 % in the wavelength range from ultraviolet to near-infrared [27]. The weighted absorption efficiency of solar radiation energy reaches 95.6 %.
The key to interfacial evaporation is the ability to perform efficient solar-thermal conversion. Photothermal conversion is an efficient energy conversion technology, which involves the process of concentrating solar radiant energy by reflection, absorption or other means and converting it into heat energy. This conversion process relies on
With the increasing development of photothermal techniques in various fields, particularly concentrated solar power (CSP) systems and solar thermoelectric generators (STEGs), the demand for high-performance
The development of renewable energy has increased over the past few years due to the high environmental cost of fossil fuels and our great dependence on them [1].Solar energy is considered one of the most promising alternative sources of energy for avoiding the dependency on fossil energy resources [2] the last 30 years, 26% of the global research
Absorption is the transformation of radiant power to another type of energy, usually heat, by interaction with matter. Fig. II.14 - a-c: Direct, mixed and diffuse reflection d-f: direct, mixed and diffuse transmission Fig. II.15 - When directly reflected or directly transmitted, an unidirectional beam follows the laws of geometrical optics: direct reflection (left): a in = a out, direct
The development of a new generation of solid particle solar receivers (SPSRs) with high solar absorptivity (0.28–2.5 μm) and high infrared emissivity (1–22 μm) is crucial and has attracted much attention for the attainment of the goals of "peak carbon" and "carbon neutrality". To achieve the modulation of infrared emission and solar absorptivity, two types of
In 2023, Liu et al. proposed an ultra-wideband perfect absorber based on titanium nitride (TiN), with an average absorption rate of up to 96.7 % in the wavelength range
With the increasing development of photothermal techniques in various fields, particularly concentrated solar power (CSP) systems and solar thermoelectric generators (STEGs), the demand for high-performance spectrally
In this context, high-entropy nitrides, as novel solar selective absorbers (SSAs) materials, play a crucial role in these applications, demonstrating excellent spectral selectivity and strong thermal and chemical stability at high temperatures and in harsh environments.
The simulation results show that the solar radiation energy spectrum in the AM1.5 band almost coincides with the absorption energy spectrum, and the absorber has a
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Efficient solar thermal conversion is crucial for renewable clean energy technologies such as solar thermal power generation, solar thermophotovoltaic and seawater desalination. To maximize solar energy conversion efficiency, a solar selective absorber with tailored absorption properties designed for solar applications is indispensable. In this study, we
2 天之前· This is crucial for maximizing the solar energy absorption and minimizing the loss of absorbed energy. To minimize heat loss, it is imperative that the absorber exhibits minimal emittance due to its own thermal emission, especially within the 0.3 to 20 μm wavelength range. Achieving near-zero emittance in this spectrum ensures the efficient retention of absorbed
The findings indicate that the solar absorber''s average absorption efficiency can range from 95.8% to 96% over the entire band range of 200 to 3100 nm, with the absorption
The key to interfacial evaporation is the ability to perform efficient solar-thermal conversion. Photothermal conversion is an efficient energy conversion technology, which
2 天之前· This is crucial for maximizing the solar energy absorption and minimizing the loss of absorbed energy. To minimize heat loss, it is imperative that the absorber exhibits minimal emittance due to its own thermal emission, especially within the 0.3 to 20 μm wavelength
The findings indicate that the solar absorber''s average absorption efficiency can range from 95.8% to 96% over the entire band range of 200 to 3100 nm, with the absorption bandwidth of 2811 nm (244–3055 nm) having the highest absorption rate. Additionally, the absorber only contains tungsten (W), titanium (Ti), and alumina (Al2O3), three
In 2008, Landy creatively designed a narrow-band perfect absorber, which uses a metal-insulator-metal structure [6].Since then, the study of perfect absorbers has continued to be the focus of many researchers, and many different solar absorbers have been designed, such as the classic Metal-Insulator-Metal (MIM) structure [[7], [8], [9]], multi-layer stacking structure
In this context, high-entropy nitrides, as novel solar selective absorbers (SSAs) materials, play a crucial role in these applications, demonstrating excellent spectral selectivity
To maximize solar energy conversion efficiency, a solar selective absorber with tailored absorption properties designed for solar applications is indispensable. In this study, we propose a broadband selective
Solar energy absorption is essential for transitioning to renewable energy sources. It impacts everything from individual households to global sustainability initiatives, playing a critical role in reducing climate change and greenhouse gas emissions.. This article explains the fundamentals of how solar energy absorption functions, examines its various
In this investigation, we report on the design and fabrication of metamaterial microstructures as metamaterial broadband solar absorbers (BMSAs) with extremely high absorption efficiencies (>96%) integrated over the broadband wavelengths in the range of 400–700 nm and (>92%) integrated over the broadband wavelengths in the range of
Additionally, according to the air mass absorption spectrum equation (AM1.5) and the blackbody radiation calculation, our absorber’s weighted average absorption efficiency in the range of 280–3100 nm is 98.3%, and the solar energy loss is only 1.7%. At 1000 K, the emission efficiency is 94.4%.
As a result, when compared to other absorbers, our proposed absorber has excellent potential for use in the field of energy harvesting technologies, such as high absorption, broadband, and high-temperature-resistant metal-dielectric composite structures and solar thermal photovoltaics. 2. Structure and Design
Comparatively, the results showed that the solar absorber based on the three-layer MIM stacked structure had an average absorption efficiency of 95.8%, good overall absorption efficiency, with the largest absorption band being 2811 nm. Figure 6. ( a) A variety of micro/nanostructures’ absorption spectra.
Solar energy is currently a very popular energy source because it is both clean and renewable. As a result, one of the main areas of research now is the investigation of solar absorbers with broad spectrum and high absorption efficiency.
Solar absorber studies frequently make use of precious metals such as Ag, Au, and Cu. Although good absorption can be obtained, the cost is high and absorbers designed with precious metal materials are more prone to deformation at high temperatures.
Overall, the changes in crystallinity of the MoTaTiCrN high-entropy absorption layer and the Si 3 N 4 layer, as well as the elemental diffusion from the SS substrate, are the main factors contributing to the decrease in solar absorption ability.
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