Greatly enhanced solar absorption via high entropy ceramic AlCrTaTiZrN based solar selective absorber coatings

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

doi:10.1016/j.jmat.2020.11.010

Cited by 26 publications

(14 citation statements)

References 40 publications

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“…Based on the above analysis of the TiVCrAlZrN film, the conclusion can be derived that this high-entropy material is appropriate for solar light harvesting, so we devise a novel double-layer structured SSA grown on an SS substrate (Figure a), in which the antireflection layer Si 3 N 4 decreases the reflectance loss and greatly increases the solar absorptance. Using the above calculated refractive index and extinction coefficient of TiVCrAlZrN, combined with the optical constants of the SS substrate and Si 3 N 4 in our previous studies, CODE software is used to design and optimize the reflectance spectra of the whole-layer coating. According to the fitted thickness of individual layers for an optimum SSA, RF magnetron sputtering is utilized to prepare the complete SSA.…”

Section: Resultsmentioning

confidence: 99%

“…Besides, in comparison with the previous high-entropy material-based absorber, the double-layer structured absorber avoided the mutual diffusion of elements between adjacent layers. Therefore, the SSA exhibits outstanding thermal stability. − …”

Section: Resultsmentioning

confidence: 99%

“…Using the above calculated refractive index and extinction coefficient of TiVCrAlZrN, combined with the optical constants of the SS substrate and Si 3 N 4 in our previous studies, 35 CODE software is used to design and optimize the reflectance spectra of the whole-layer coating. According to the fitted thickness of individual layers for an optimum SSA, RF magnetron sputtering is utilized to prepare the complete SSA.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…It is instructive to design and explore HEN-based SSAs under the prerequisites of proper compositions and deposition parameters. Subsequently, we developed an HEN AlCrTaTiZrN-based three-layer structured SSA with a better optical performance (α = 96.5%, ε = 8.6%) and thermally stability at 600 °C for 10 h. 35 It is well-known that there are a large number of possible elemental combinations in the multi-principal element alloy system with great potential to provide HEN-based SSAs with better spectral selectivity and thermal robustness. 36 In this contribution, with the reinforcements of a doublelayer structure, we pioneer a novel SSA based on high-entropy ceramic TiVCrAlZrN.…”

Section: ■ Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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%

Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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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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“…Alloy composed of five or more main elements is called high entropy alloys (HEAs), which is emerging as a new promising SSA material. It was reported that HEA containing transition metal elements (such as Ti, Ta, Hf, Mo, Cr, and Zr) have excellent thermodynamic and optical properties, such as AlCrTaTiZrN, [ 30 ] (AlCrTaTiZrRu)N 0.7 , [ 31 ] Al 0.4 Hf 0.6 NbTaTiZrN, [ 32 ] AlCrWTaNbTiN, [ 33 ] etc. These have been widely studied because of their excellent thermal stability.…”

Section: Recent Advances In Ssasmentioning

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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High‐Entropy Photothermal Materials

He,

Li,

Zhou

et al. 2024

Advanced Materials

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High‐entropy (HE) materials, celebrated for their extraordinary chemical and physical properties, have garnered increasing attention for their broad applications across diverse disciplines. The expansive compositional range of these materials allows for nuanced tuning of their properties and innovative structural designs. Recent advances have been centered on their versatile photothermal conversion capabilities, effective across the full solar spectrum (300‐2500 nm). The HE effect, coupled with hysteresis diffusion, imparts these materials with desirable thermal and chemical stability. These attributes position HE materials as a revolutionary alternative to traditional photothermal materials, signifying a transformative shift in photothermal technology. This review delivers a comprehensive summary of the current state of knowledge regarding HE photothermal materials, emphasizing the intricate relationship between their compositions, structures, light‐absorbing mechanisms, and optical properties. Furthermore, the review outlines the notable advances in HE photothermal materials, emphasizing their contributions to areas such as solar water evaporation, personal thermal management, solar thermoelectric generation, catalysis, and biomedical applications. The review culminates in presenting a roadmap that outlines prospective directions for future research in this burgeoning field, and also outlines fruitful ways to develop advanced HE photothermal materials and to expand their promising applications.This article is protected by copyright. All rights reserved

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Greatly enhanced solar absorption via high entropy ceramic AlCrTaTiZrN based solar selective absorber coatings

Cited by 26 publications

References 40 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

High‐Entropy Photothermal Materials

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