Broadband refractory plasmonic absorber without refractory metals for solar energy conversion

Wang, Baoqing; Wang, Wenhao; Ashalley, Eric; Zhang, Xutao; Yu, Peng; Xu, Hongxing

doi:10.1088/1361-6463/abcc27

Cited by 9 publications

(4 citation statements)

References 41 publications

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“…The conversion of optical energy to thermal energy can be described by Equation () [ 17 ]

\begin{matrix} ρ C_{p} \frac{\partial T}{\partial t} - \nabla \cdot (k \nabla T) = Q_{normalr} - Q_{normalc} \end{matrix}

where T is the temperature, t is the time, and ρ, C p , and k are the density, specific heat capacity, and thermal conductivity of the considered material, respectively; furthermore, Q r is the local heat power of the TiN absorber. The generated heat power Q r can be obtained from Equation () [ 18 ]

\begin{matrix} Q_{normalr} = \frac{ω ε_{0}}{2} I m ({}, ε (r, ω)) {|E (r, ω)|}^{2} \end{matrix}

where ε 0 is the vacuum permittivity and Im{ε( r , ω)} is the imaginary part of the permittivity. Q c is the dissipated energy transferred from the absorber to the external environment, which can be expressed as

\begin{matrix} Q_{normalc} = B (T - T_{amb}) \end{matrix}

where B is the thermal transfer coefficient from the absorber to the external environment, and T amb is the environment temperature (293.15 K).…”

Section: Resultsmentioning

confidence: 99%

“…where T is the temperature, t is the time, and ρ, C p , and k are the density, specific heat capacity, and thermal conductivity of the considered material, respectively; furthermore, Q r is the local heat power of the TiN absorber. The generated heat power Q r can be obtained from Equation (3) [18] 2 , , r 0 2 where ε 0 is the vacuum permittivity and Im{ε(r, ω)} is the imaginary part of the permittivity. Q c is the dissipated energy transferred from the absorber to the external environment, which can be expressed as…”

Section: Photothermal Conversion: Performance and Mechanismmentioning

confidence: 99%

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Ultraflexible Photothermal Superhydrophobic Coating with Multifunctional Applications Based on Plasmonic TiN Nanoparticles

Wang

Jing

Zhao

et al. 2022

Advanced Optical Materials

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Photothermal superhydrophobic coatings are essential for a variety of applications including anti‐icing and light‐driven self‐propelled motion. However, achieving a flexible and durable superhydrophobic coating with high photothermal efficiency and long‐term stability is still challenging. Herein, a facile and eco‐friendly approach to realizing a superhydrophobic coating with excellent flexibility is proposed. The coating is obtained by spraying titanium nitride (TiN) nanoparticles embedded in polydimethylsiloxane (PDMS) solution onto various substrates. A tight binding between the substrate and nanoparticles occurs that offers the coating the mechanical robustness to endure bending, twisting, abrasion, and tape peeling. The water repellency is retained even after 500 cycles of bending–twisting tests. Combined with the micro–nanoscale porous structure of the surface and plasmonic property of TiN nanoparticles, the coating shows excellent superhydrophobicity and high photothermal conversion properties. The equilibrium temperature of the coating is as high as 130 °C at room temperature under 1 W cm−2 of 808 nm near‐infrared laser irradiation. Due to its flexible property, the coating can be easily applied to irregular surfaces, which, together with the excellent anticorrosion, anti‐icing, and defrosting performances, makes it a reliable resource for multifunctional applications. This work offers a novel technological approach to flexible devices, wearable electronics, and smart textiles.

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“…The conversion of optical energy to thermal energy can be described by Equation () [ 17 ]

\begin{matrix} ρ C_{p} \frac{\partial T}{\partial t} - \nabla \cdot (k \nabla T) = Q_{normalr} - Q_{normalc} \end{matrix}

\begin{matrix} Q_{normalr} = \frac{ω ε_{0}}{2} I m ({}, ε (r, ω)) {|E (r, ω)|}^{2} \end{matrix}

\begin{matrix} Q_{normalc} = B (T - T_{amb}) \end{matrix}

where B is the thermal transfer coefficient from the absorber to the external environment, and T amb is the environment temperature (293.15 K).…”

Section: Resultsmentioning

confidence: 99%

Section: Photothermal Conversion: Performance and Mechanismmentioning

confidence: 99%

Ultraflexible Photothermal Superhydrophobic Coating with Multifunctional Applications Based on Plasmonic TiN Nanoparticles

Wang

Jing

Zhao

et al. 2022

Advanced Optical Materials

Self Cite

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“…For example, Wu et al designed a nanoporous hyperbolic metamaterial structure to achieve high-efficiency solar absorption with an average absorption rate of more than 96% in the wavelength range of 250–1560 nm, and, at the same time, the light-to-heat conversion efficiency reached 90.23% at a temperature of 373.15 K [ 36 ]. Wang and co-workers theoretically proposed a broadband refractory plasmonic metamaterial without refractory metal and realized solar energy absorption efficiency of 90.8% over the solar full-spectrum [ 37 ]. After that, Zhou et al used a two-dimensional titanium grating structure to achieve an average absorption rate of 97.85% in the wavelength range of 200–2980 nm, and the PTCE was higher than 90% in the temperature range of 100–800 °C [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

Ultra-Broadband Refractory All-Metal Metamaterial Selective Absorber for Solar Thermal Energy Conversion

Chen

Niu

et al. 2021

Nanomaterials

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A full-spectrum near-unity solar absorber has attracted substantial attention in recent years, and exhibited broad application prospects in solar thermal energy conversion. In this paper, an all-metal titanium (Ti) pyramid structured metamaterial absorber (MMA) is proposed to achieve broadband absorption from the near-infrared to ultraviolet, exhibiting efficient solar-selective absorption. The simulation results show that the average absorption rate in the wavelength range of 200–2620 nm reached more than 98.68%, and the solar irradiation absorption efficiency in the entire solar spectrum reached 98.27%. The photothermal conversion efficiency (PTCE) reached 95.88% in the entire solar spectrum at a temperature of 700 °C. In addition, the strong and broadband absorption of the MMA are due to the strong absorption of local surface plasmon polariton (LSPP), coupled results of multiple plasmons and the strong loss of the refractory titanium material itself. Additionally, the analysis of the results show that the MMA has wide-angle incidence and polarization insensitivity, and has a great processing accuracy tolerance. This broadband MMA paves the way for selective high-temperature photothermal conversion devices for solar energy harvesting and seawater desalination applications.

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“…Ultimately, conventional absorbers encounter resistance to solar energy application due to their high cost and low reserves of noble metals. Usually, the polarization-independent property can be obtained if the absorber exhibits high symmetry in morphology [23][24][25]. Some asymmetric absorbers have also been presented and exhibited good polarization-independent performance in recent years [26,27].…”

Section: Introductionmentioning

confidence: 99%

Ultra-broadband solar light wave trapping by gradient cavity-thin-film metasurface

Liao

Liu

et al. 2021

J. Phys. D: Appl. Phys.

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Despite the fact that solar energy has been widely used as a renewable and clean energy source for decades, when designing solar irradiation absorbers one is generally confronted with the dilemma of choosing between higher absorption but narrowband or broadband but lower absorption, which has greatly limited the development of the solar energy industry. In this work, a gradient cavity-thin-film metasurface (GCM) made up of alternating multiple layers of titanium (Ti) and silicon dioxide (SiO2) exhibits ultra-broadband strong absorption in 354–2980 nm. The operating bandwidth covers the dominating portion of the solar irradiation spectrum. The absorption spectrum can be manipulated by adjusting the structural parameters of the unit cell. It is worth noting that the spectrally weighted solar absorption efficiency reaches 98.28% under the AM 1.5G illumination. This impressive near-unity absorption could be attributed to multiple light–matter interactions including surface plasmon resonances, cavity resonance, and the intrinsic spectral responses of multi-layer refractory material. In addition, the absorption response is insensitive to the incident angle and polarization states. These high performances provide the GCM with great potential for practical applications in solar thermal energy harvesting and photothermal conversion, etc.

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Broadband refractory plasmonic absorber without refractory metals for solar energy conversion

Cited by 9 publications

References 41 publications

Ultraflexible Photothermal Superhydrophobic Coating with Multifunctional Applications Based on Plasmonic TiN Nanoparticles

Ultraflexible Photothermal Superhydrophobic Coating with Multifunctional Applications Based on Plasmonic TiN Nanoparticles

Ultra-Broadband Refractory All-Metal Metamaterial Selective Absorber for Solar Thermal Energy Conversion

Ultra-broadband solar light wave trapping by gradient cavity-thin-film metasurface

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