Scalable and highly efficient high temperature solar absorber coatings based on high entropy alloy nitride AlCrTaTiZrN with different antireflection layers

He, Cheng-Yu; Gao, Xiang‐Hu; Yu, Dongmei; Qiu, Xiao‐Yang; Guo, Huixia; Liu, Gang

doi:10.1039/d0ta09988k

Cited by 33 publications

(17 citation statements)

References 50 publications

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“…However, it is still quite challenging to identify whether the newly generated phases are from the SS substrate or HEN TiVCrAlZrN layer. A previous work has reported that the SS substrate after annealing at 900 °C for 2 h results in the Cr 2 O 3 and Fe 3 O 4 phases originated from elemental diffusion and oxidation of the substrate . Hence, we fabricated the TiVCrAlZrN-based SSA on a Si substrate to examine the optical thermal stability at 900 °C (Figure f).…”

Section: Resultsmentioning

confidence: 99%

Toward a Scalable and Cost-Conscious Structure in Spectrally Selective Absorbers: Using High-Entropy Nitride TiVCrAlZrN

Zhang

et al. 2021

ACS Appl. Energy Mater.

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Enabling a highly enhanced optical performance and high-temperature thermal robustness, acting as a primary absorption layer material, remains a challenge in photothermal conversion systems, which is why the newly emerging high-entropy alloy (HEA) is introduced. Herein, we develop a high-entropy nitride TiVCrAlZrN-based spectrally selective absorber, providing the potential to strengthen structural and optical advancement through component selection and structure design. The combination of computer simulation and a magnetron sputtering method pioneers a double-layer structured coating with a sound solar absorptance (α = 92.4%) and an ultra-low thermal emittance (ε = 5.3%), leading to a high spectral selectivity (α/ε = 17.4). Investigating the structural and optical robustness demonstrates that the coating could endure heat-treatment at 800 °C for 2 h in a vacuum environment. At the same time, the research on long-term thermal stability indicates that the TiVCrAlZrN-based absorber could retain good optical properties after annealing at 550 °C for 168 h. Overall, the synergistic advantages of the convenient technology process, low-cost preparation, easily scalable production, and repeatability in this work promise potentially valuable applications for photothermal conversion techniques. The conceptual and practical breakthroughs promote practical applications of the HEA in photothermal fields and significantly extend the paradigm to devise a photothermal absorber.

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Section: Resultsmentioning

confidence: 99%

Toward a Scalable and Cost-Conscious Structure in Spectrally Selective Absorbers: Using High-Entropy Nitride TiVCrAlZrN

Zhang

et al. 2021

ACS Appl. Energy Mater.

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“…By optimizing elemental composition, He et al also developed a single layer SSAC based on AlCrTaTiZrN with simple structure, low cost and scalable preparation. [ 35 ] The as‐prepared coating can endure 800 °C annealing treatment for 2 h and superior optical performance after annealing at 650 °C for 300 h (Figure 3b). These recent advances in HEAs have promoted the significant development of HEAs in the field of high‐temperature photothermal conversion materials and offered immeasurable potential for photothermal conversion systems.…”

Section: Recent Advances In Ssasmentioning

confidence: 99%

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confidence: 99%

Solar Selective Absorber for Emerging Sustainable Applications

Zhang

Wang

Shi

et al. 2022

Adv Energy and Sustain Res

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Solar selective absorbers (SSAs) possess high sunlight absorption (300–2500 nm) and low infrared thermal radiative losses (2.5–25 μm), which are undoubtedly the best choice for photothermal conversion process, and SSAs have been widely used in concentrating solar power, solar water heating, and solar drying. Recently, to promote the realization of “double carbon” goal, SSAs have received widespread attentions, many emerging sustainable applications have been developed. In this review, the recent developments of SSAs and their latest sustainable applications in solar‐driven seawater desalination, multistage solar desalination, atmospheric water harvesting (AWH), wastewater treatment, solar thermophotovoltaics (STPVs), hybrid photovoltaic‐thermal (HPVT), solar‐thermoelectric generators (STEG), personal thermal management (PTM), photothermal catalysis, photothermal deicing, and photothermal sterilization, etc. are systematically summarized. Also, the challenges as well as future opportunities of SSAs are discussion. It is expected that this review will effectively complement the published comments on SSAs and provide more inspirations on sustainable applications of SSAs in the future.

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“…However, the difficulties in nanostructure fabrication, such as large-area manufacturing, size control at nanoscale, and cost, seriously hinder their practical applications. In contrast, the planar multilayer structures based on surface-state resonances are the most promising candidates to achieve desired selective emission over a large area, which can mitigate the fabrication limitations of nanostructures [ 32 , 33 , 34 , 35 , 36 , 37 ].…”

Section: Introductionmentioning

confidence: 99%

Tunable Narrowband Silicon-Based Thermal Emitter with Excellent High-Temperature Stability Fabricated by Lithography-Free Methods

Hou¹,

Wang²,

Zhu³

et al. 2021

Nanomaterials

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Thermal emitters with properties of wavelength-selective and narrowband have been highly sought after for a variety of potential applications due to their high energy efficiency in the mid-infrared spectral range. In this study, we theoretically and experimentally demonstrate the tunable narrowband thermal emitter based on fully planar Si-W-SiN/SiNO multilayer, which is realized by the excitation of Tamm plasmon polaritons between a W layer and a SiN/SiNO-distributed Bragg reflector. In conjunction with electromagnetic simulations by the FDTD method, the optimum structure design of the emitter is implemented by 2.5 periods of DBR structure, and the corresponding emitter exhibits the nearly perfect narrowband absorption performance at the resonance wavelength and suppressed absorption performance in long wave range. Additionally, the narrowband absorption peak is insensitive to polarization mode and has a considerable angular tolerance of incident light. Furthermore, the actual high-quality Si-W-SiN/SiNO emitters are fabricated through lithography-free methods including magnetron sputtering and PECVD technology. The experimental absorption spectra of optimized emitters are found to be in good agreement with the simulated absorption spectra, showing the tunable narrowband absorption with all peak values of over 95%. Remarkably, the fabricated Si-W-SiN/SiNO emitter presents excellent high-temperature stability for several heating/cooling cycles confirmed up to 1200 K in Ar ambient. This easy-to-fabricate and tunable narrowband refractory emitter paves the way for practical designs in various photonic and thermal applications, such as thermophotovoltaic and IR radiative heaters.

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Scalable and highly efficient high temperature solar absorber coatings based on high entropy alloy nitride AlCrTaTiZrN with different antireflection layers

Abstract: High entropy alloy, which emerges as a novel multi-principal component alloy, has been constantly expanding its functional application in the field from optical materials to high temperature materials due to...

Cited by 33 publications

References 50 publications

Toward a Scalable and Cost-Conscious Structure in Spectrally Selective Absorbers: Using High-Entropy Nitride TiVCrAlZrN

Toward a Scalable and Cost-Conscious Structure in Spectrally Selective Absorbers: Using High-Entropy Nitride TiVCrAlZrN

Solar Selective Absorber for Emerging Sustainable Applications

Tunable Narrowband Silicon-Based Thermal Emitter with Excellent High-Temperature Stability Fabricated by Lithography-Free Methods

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