1
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Chen H, Wu M, Zhou T, Hou A, Xie K, Gao A. A multi-scale layered helical structure composite using the co-dispersion of cellulose nanocrystals and the micro-nano Al sheets and its efficient near-infrared stealth performance. Carbohydr Polym 2024; 331:121895. [PMID: 38388066 DOI: 10.1016/j.carbpol.2024.121895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 01/25/2024] [Accepted: 01/30/2024] [Indexed: 02/24/2024]
Abstract
To design flexible functional materials with high efficiency, light weight, less metal consumption, stable structure for the thermal infrared stealth materials is a great challenge. We hypothesized that the use of crystal materials with different sizes to design composites with a chiral layered helical structure, the layered structures can repeatedly reflect infrared ray. Here, we reported the novel multi-scale layered helical chiral structure composite by self-assembly using the co-dispersion of cellulose nanocrystals (CNC) and micro-nano Al sheets. A new stable interlocking supermolecular structure is formed between the positively charged metal sheet and the negatively charged CNC photonic crystals. Metal sheets and CNC organic crystals were hybridized at the molecular level and form the Pickering-like CNC-Al co-dispersion system. The metal sheets in CNC chiral helical layered structure greatly improve its near-infrared reflection and stealth camouflage. Surprisingly, the CNC/Al composite on the heated glass substrate enabled the temperature drop 23 °C, and made its emissivity in the range of 7-14 μm significantly reduce. The synergetic effect of the Al sheets and the CNCs helical structure greatly improved the thermal infrared reflection and heat insulation properties. It is expected to provide a chiral layered material for the infrared stealth, and pattern camouflage fields.
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Affiliation(s)
- Huanghuang Chen
- College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, PR China
| | - Mengting Wu
- College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, PR China
| | - Tianchi Zhou
- Institute of Flexible Functional Materials, Yancheng Institute of Technology, Yancheng 224051, PR China
| | - Aiqin Hou
- College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, PR China.
| | - Kongliang Xie
- College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, PR China
| | - Aiqin Gao
- College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, PR China.
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2
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Liu R, Wang S, Zhou Z, Zhang K, Wang G, Chen C, Long Y. Materials in Radiative Cooling Technologies. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2401577. [PMID: 38497602 DOI: 10.1002/adma.202401577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 03/12/2024] [Indexed: 03/19/2024]
Abstract
Radiative cooling (RC) is a carbon-neutral cooling technology that utilizes thermal radiation to dissipate heat from the Earth's surface to the cold outer space. Research in the field of RC has garnered increasing interest from both academia and industry due to its potential to drive sustainable economic and environmental benefits to human society by reducing energy consumption and greenhouse gas emissions from conventional cooling systems. Materials innovation is the key to fully exploit the potential of RC. This review aims to elucidate the materials development with a focus on the design strategy including their intrinsic properties, structural formations, and performance improvement. The main types of RC materials, i.e., static-homogeneous, static-composite, dynamic, and multifunctional materials, are systematically overviewed. Future trends, possible challenges, and potential solutions are presented with perspectives in the concluding part, aiming to provide a roadmap for the future development of advanced RC materials.
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Affiliation(s)
- Rong Liu
- Department of Electronic Engineering, The Chinese University of Hong Kong, New Territories, Hong Kong SAR, 999077, China
| | - Shancheng Wang
- Department of Electronic Engineering, The Chinese University of Hong Kong, New Territories, Hong Kong SAR, 999077, China
| | - Zhengui Zhou
- Department of Electronic Engineering, The Chinese University of Hong Kong, New Territories, Hong Kong SAR, 999077, China
| | - Keyi Zhang
- Department of Electronic Engineering, The Chinese University of Hong Kong, New Territories, Hong Kong SAR, 999077, China
| | - Guanya Wang
- Department of Electronic Engineering, The Chinese University of Hong Kong, New Territories, Hong Kong SAR, 999077, China
| | - Changyuan Chen
- Department of Electronic Engineering, The Chinese University of Hong Kong, New Territories, Hong Kong SAR, 999077, China
| | - Yi Long
- Department of Electronic Engineering, The Chinese University of Hong Kong, New Territories, Hong Kong SAR, 999077, China
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3
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Han D, Wang C, Han CB, Cui Y, Ren WR, Zhao WK, Jiang Q, Yan H. Highly Optically Selective and Thermally Insulating Porous Calcium Silicate Composite SiO 2 Aerogel Coating for Daytime Radiative Cooling. ACS APPLIED MATERIALS & INTERFACES 2024; 16:9303-9312. [PMID: 38343044 DOI: 10.1021/acsami.3c18101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
Daytime radiative cooling technology offers a low-carbon, environmentally friendly, and nonpower-consuming approach to realize building energy conservation. It is important to design materials with high solar reflectivity and high infrared emissivity in atmospheric windows. Herein, a porous calcium silicate composite SiO2 aerogel water-borne coating with strong passive radiative cooling and high thermal insulation properties is proposed, which shows an exceptional solar reflectance of 94%, high sky window emissivity of 96%, and 0.0854 W/m·K thermal conductivity. On the SiO2/CaSiO3 radiative cooling coating (SiO2-CS-coating), a strategy is proposed to enhance the atmospheric window emissivity by lattice resonance, which is attributed to the eight-membered ring structure of porous calcium silicate, thereby increasing the atmospheric window emissivity. In the daytime test (solar irradiance 900W/m2, ambient temperature 43 °C, wind speed 0.53 m/s, humidity 25%), the temperature inside the box can achieve a cooling temperature of 13 °C lower than that of the environment, which is 30 °C, and the theoretical cooling power is 96 W/m2. Compared with the commercial white coating, SiO2-CS-coating can save 70 kW·h of electric energy in 1 month, and the energy consumption is reduced by 36%. The work provides a scalable, widely applicable radiative-cooling coating for building comfort, which can greatly reduce indoor temperatures and is suitable for building surfaces.
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Affiliation(s)
- Dong Han
- Key Laboratory of Advanced Functional Materials (Beijing University of Technology), Ministry of Education, Beijing University of Technology, Beijing 100124, People's Republic of China
| | - Chenghai Wang
- Key Laboratory of Advanced Functional Materials (Beijing University of Technology), Ministry of Education, Beijing University of Technology, Beijing 100124, People's Republic of China
- Langgu (Tianjin) New Material Technology Co., Ltd., Tianjin 300392, People's Republic of China
| | - Chang Bao Han
- Key Laboratory of Advanced Functional Materials (Beijing University of Technology), Ministry of Education, Beijing University of Technology, Beijing 100124, People's Republic of China
| | - Yanan Cui
- Langgu (Tianjin) New Material Technology Co., Ltd., Tianjin 300392, People's Republic of China
| | - Wen Rui Ren
- Key Laboratory of Advanced Functional Materials (Beijing University of Technology), Ministry of Education, Beijing University of Technology, Beijing 100124, People's Republic of China
| | - Wen Kang Zhao
- Key Laboratory of Advanced Functional Materials (Beijing University of Technology), Ministry of Education, Beijing University of Technology, Beijing 100124, People's Republic of China
| | - Quan Jiang
- China Testing & Certification International Group Co., Ltd., Beijing 100000, People's Republic of China
- China Buiding Material Federation Metal Composite Materials & Products Branch, Beijing 100024, People's Republic of China
| | - Hui Yan
- Key Laboratory of Advanced Functional Materials (Beijing University of Technology), Ministry of Education, Beijing University of Technology, Beijing 100124, People's Republic of China
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4
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Lee SY, Chae D, Kim J, Oh S, Lim H, Kim J, Lee H, Oh SJ. Smart building block with colored radiative cooling devices and quantum dot light emitting diodes. NANOSCALE 2024; 16:1664-1672. [PMID: 38168818 DOI: 10.1039/d3nr04884e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
In this study, we design a smart building block with quantum-dot light-emitting diode (QLED) and colored radiative cooling devices. A smart light-emitting building block is fabricated using a bottom-inverted QLED that emits green light, an insulating layer, and a top radiative cooling structure that emits mid-infrared light. The heat generated during QLED operation is measured and analyzed to investigate the correlation between heat and QLED degradation. The top cooling part is designed to have no impact on the QLED's performance and utilizes Ag-polydimethylsiloxane as a visible-light reflector and mid-infrared absorber/emitter. For the colored cooling part, white radiative cooling paint is used instead of Ag-polydimethylsiloxane to improve cooling performance, and red and yellow paints are employed to realize vivid red and yellow colors, respectively. We demonstrate a smart imitation house system with a smart light-emitting building block as the roof and analyze the cooling of the heat generated during QLED operation. A maximum cooling effect of up to 9.6 °C is observed compared to the imitation house system without the smart light-emitting building block, effectively dissipating heat generated during QLED operation. The smart light-emitting building block presented in this study opens new avenues in the fields of lighting and cooling systems.
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Affiliation(s)
- Sang Yeop Lee
- Department of Materials Science and Engineering, Korea University 145, Anam-ro Seongbuk-gu, Seoul, 02841, Republic of Korea.
| | - Dongwoo Chae
- Department of Materials Science and Engineering, Korea University 145, Anam-ro Seongbuk-gu, Seoul, 02841, Republic of Korea.
| | - Jungho Kim
- Department of Advanced Materials Engineering, Kyonggi University, Suwon-si, Gyeonggi-do 16227, Republic of Korea.
| | - Seongkeun Oh
- Department of Materials Science and Engineering, Korea University 145, Anam-ro Seongbuk-gu, Seoul, 02841, Republic of Korea.
| | - Hangyu Lim
- Department of Materials Science and Engineering, Korea University 145, Anam-ro Seongbuk-gu, Seoul, 02841, Republic of Korea.
| | - Jiwan Kim
- Department of Advanced Materials Engineering, Kyonggi University, Suwon-si, Gyeonggi-do 16227, Republic of Korea.
| | - Heon Lee
- Department of Materials Science and Engineering, Korea University 145, Anam-ro Seongbuk-gu, Seoul, 02841, Republic of Korea.
| | - Soong Ju Oh
- Department of Materials Science and Engineering, Korea University 145, Anam-ro Seongbuk-gu, Seoul, 02841, Republic of Korea.
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5
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Chae D, Lee SY, Lim H, Son S, Ha J, Park J, Park JH, Oh SJ, Lee H. Vivid Colored Cooling Structure Managing Full Solar Spectrum via Near-Infrared Reflection and Photoluminescence. ACS APPLIED MATERIALS & INTERFACES 2023; 15:58274-58285. [PMID: 38051105 DOI: 10.1021/acsami.3c08790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
Colored radiative cooling (CRC) offers an attractive alternative for surface and space cooling, while preserving the aesthetics of an object. However, there has been no study on the CRC using phosphors in regard to vivid coloration, sophisticated performance investigation, retention of properties, functionality, and structural flexibility all at once. Thus, to manage the entire solar spectrum, a colored cooling structure comprising a near-infrared (NIR)-reflective bottom layer and a top colored layer with a phosphor-embedded polymer matrix is proposed. The structure is paintable, vividly colored, hydrophobic, and ultraviolet (UV) and water resistant. In the daytime outdoor measurement, the structure with red, orange, and yellow colors exhibited lower temperature than a control group using commercial white paint by 4.7 °C, 7.2 °C, and 7.4 °C, respectively. After precise theoretical and experimental time-tracing temperature validation, the CRC performance enhancement from NIR reflection and photoluminescence effects was thoroughly analyzed, and a temperature reduction of up to 16.1 °C was achieved for the orange-colored structure. Furthermore, experiments of hydrophobicity infusion and exposure to UV and deionized water verified the durability of the colored cooling structure. In addition, flexible-film-type colored cooling structures were demonstrated using different bottom reflective layers, such as a silver thin film and porous aluminum oxide particle-embedded poly(vinylidene fluoride-co-hexafluoropropylene), suggesting the potential applicability of these colored cooling structures for vivid-colored, functional, and durable CRC.
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Affiliation(s)
- Dongwoo Chae
- Department of Materials Science and Engineering, Korea University, Anam-ro 145, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Sang Yeop Lee
- Department of Materials Science and Engineering, Korea University, Anam-ro 145, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Hangyu Lim
- Department of Materials Science and Engineering, Korea University, Anam-ro 145, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Soomin Son
- Department of Materials Science and Engineering, Korea University, Anam-ro 145, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Jisung Ha
- Department of Materials Science and Engineering, Korea University, Anam-ro 145, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Jaein Park
- Department of Materials Science and Engineering, Korea University, Anam-ro 145, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Jun Hyeok Park
- Department of Materials Science and Engineering, Korea University, Anam-ro 145, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Soong Ju Oh
- Department of Materials Science and Engineering, Korea University, Anam-ro 145, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Heon Lee
- Department of Materials Science and Engineering, Korea University, Anam-ro 145, Seongbuk-gu, Seoul 02841, Republic of Korea
- ZERC, 620, New Engineering building, 73-15, Anam-ro, Seongbuk-gu, Seoul Republic of Korea
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6
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Wang Y, Wang T, Liang J, Wu J, Yang M, Pan Y, Hou C, Liu C, Shen C, Tao G, Liu X. Controllable-morphology polymer blend photonic metafoam for radiative cooling. MATERIALS HORIZONS 2023; 10:5060-5070. [PMID: 37661692 DOI: 10.1039/d3mh01008b] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
Incorporating radiative cooling photonic structures into the cooling systems of buildings presents a novel strategy to mitigate global warming and boost global carbon neutrality. Photonic structures with excellent solar reflection and thermal emission can be obtained by a rational combination of different materials. The current preparation strategies of radiative cooling materials are dominated by doping inorganic micro-nano particles into polymers, which usually possess insufficient solar reflectance. Here, a porous polymer metafoam was prepared with polycarbonate (PC) and polydimethylsiloxane (PDMS) using a simple thermally induced phase separation method. The metafoam exhibits strong solar reflectivity (97%), superior thermal emissivity (91%), and low thermal conductivity (46 mW m-1 K-1) due to the controllable morphology of the randomly dispersed light-scattering air voids. Cooling tests demonstrate that the metafoam could reduce the average temperature by 5.2 °C and 10.2 °C during the daytime and nighttime, respectively. In addition, the simulation of a cooling energy system of buildings indicates that the metafoam can save 3.2-26.7 MJ m-2 per year in different cities, which is an energy-saving percentage of 14.7-41%. The excellent comprehensive performances, including the passive cooling property, thermal insulation and self-cleaning of the metafoam makes it appropriate for practical outdoor applications, exhibiting its great potential as an energy-saving building cooling material.
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Affiliation(s)
- Yajie Wang
- College of Materials Science and Engineering, State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Wenhua Road 97-1, Zhengzhou, 450002, P. R. China.
| | - Tiecheng Wang
- College of Materials Science and Engineering, State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Wenhua Road 97-1, Zhengzhou, 450002, P. R. China.
| | - Jun Liang
- Wuhan National Laboratory for Optoelectronics, School of Materials Science and Engineering, State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China.
| | - Jiawei Wu
- Wuhan National Laboratory for Optoelectronics, School of Materials Science and Engineering, State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China.
| | - Maiping Yang
- Wuhan National Laboratory for Optoelectronics, School of Materials Science and Engineering, State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China.
| | - Yamin Pan
- College of Materials Science and Engineering, State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Wenhua Road 97-1, Zhengzhou, 450002, P. R. China.
| | - Chong Hou
- Wuhan National Laboratory for Optoelectronics, School of Optics and Electronic Information, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China
| | - Chuntai Liu
- College of Materials Science and Engineering, State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Wenhua Road 97-1, Zhengzhou, 450002, P. R. China.
| | - Changyu Shen
- College of Materials Science and Engineering, State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Wenhua Road 97-1, Zhengzhou, 450002, P. R. China.
| | - Guangming Tao
- Wuhan National Laboratory for Optoelectronics, School of Materials Science and Engineering, State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China.
| | - Xianhu Liu
- College of Materials Science and Engineering, State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Wenhua Road 97-1, Zhengzhou, 450002, P. R. China.
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7
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Wang T, Xiao Y, King JL, Kats MA, Stebe KJ, Lee D. Bioinspired Switchable Passive Daytime Radiative Cooling Coatings. ACS APPLIED MATERIALS & INTERFACES 2023; 15:48716-48724. [PMID: 37812501 DOI: 10.1021/acsami.3c11338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/11/2023]
Abstract
Passive daytime radiative cooling (PDRC) relies on simultaneous reflection of sunlight and radiation toward cold outer space. Current designs of PDRC coatings have demonstrated potential as eco-friendly alternatives to traditional electrical air conditioning (AC). While many features of PDRC have been individually optimized in different studies, for practical impact, it is essential for a system to demonstrate excellence in all essential aspects, like the materials that nature has created. We propose a bioinspired PDRC structure templated by bicontinuous interfacially jammed emulsion gels (bijels) that possesses excellent cooling, thinness, tunability, scalability, and mechanical robustness. The unique bicontinuous disordered structure captures key features of Cyphochilus beetle scales, enabling a thin (130 μm) bijel PDRC coating to achieve high solar reflectance (≳0.97) and high longwave-infrared (LWIR) emissivity (≳0.93), resulting in a subambient temperature drop of ∼5.6 °C under direct sunlight. We further demonstrate switchable cooling inspired by the exoskeleton of the Hercules beetle and mechanical robustness in analogy to spongy bone structures.
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Affiliation(s)
- Tiancheng Wang
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Yuzhe Xiao
- Department of Electrical and Computer Engineering, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
- Department of Physics, University of North Texas, Denton, Texas 76203, United States
| | - Jonathan L King
- Department of Electrical and Computer Engineering, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Mikhail A Kats
- Department of Electrical and Computer Engineering, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Kathleen J Stebe
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Daeyeon Lee
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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8
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Kousis I, D’Amato R, Pisello AL, Latterini L. Daytime Radiative Cooling: A Perspective toward Urban Heat Island Mitigation. ACS ENERGY LETTERS 2023; 8:3239-3250. [PMID: 37469389 PMCID: PMC10353003 DOI: 10.1021/acsenergylett.3c00905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Accepted: 06/23/2023] [Indexed: 07/21/2023]
Abstract
Traditional cooling and heating systems in residential buildings account for more than 15% of global electricity consumption and 10% of global emissions of greenhouse gases. Daytime radiative cooling (DRC) is an emerging passive cooling technology that has garnered significant interest in recent years due to its high cooling capability. It is expected to play a pivotal role in improving indoor and outdoor urban environments by mitigating surface and air temperatures while decreasing relevant energy demand. Yet, DRC is in its infancy, and thus several challenges need to be addressed to establish its efficient wide-scale application into the built environment. In this Perspective, we critically discuss the strategies and progress in materials development to achieve DRC and highlight the challenges and future paths to pave the way for real-life applications. Advances in nanofabrication in combination with the establishment of uniform experimental protocols, both in the laboratory/field and through simulations, are expected to drive economic increases in DRC.
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Affiliation(s)
- Ioannis Kousis
- Environmental
Applied Physics Lab (EAPLAB) at Interuniversity Research Center on
Pollution and Environment (CIRIAF), University
of Perugia, Via G. Duranti 63, Perugia 06125, Italy
| | - Roberto D’Amato
- Nano4Light-Lab,
Department of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di Sotto 8, Perugia 06123, Italy
| | - Anna Laura Pisello
- Environmental
Applied Physics Lab (EAPLAB) at Interuniversity Research Center on
Pollution and Environment (CIRIAF), University
of Perugia, Via G. Duranti 63, Perugia 06125, Italy
- Department
of Engineering, University of Perugia, Via G. Duranti 97, Perugia 06125, Italy
| | - Loredana Latterini
- Nano4Light-Lab,
Department of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di Sotto 8, Perugia 06123, Italy
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9
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Cao J, Xu H, Li X, Gu Y. Colored Daytime Radiative Cooling Textiles Supported by Semiconductor Quantum Dots. ACS APPLIED MATERIALS & INTERFACES 2023; 15:19480-19489. [PMID: 37023362 DOI: 10.1021/acsami.3c02418] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Radiative cooling, a zero-energy, eco-friendly cooling technology, has attracted tremendous attention recently for its potential of fighting global warming and climate changes. Radiative cooling fabrics with diffused solar reflections typically have reduced light pollution and can be mass-produced with currently available techniques. However, the monotonous white color has hindered its further applications and no colored radiative cooling textiles are available yet. In this work, we electrospun PMMA textiles containing CsPbBrxI3-x quantum dots as the colorant to achieve colored radiative cooling textiles. A theoretical model to predict the 3D color volume and cooling threshold was proposed for this system. As indicated by the model, a sufficiently high quantum yield (>0.9) will guarantee a wide color gamut and strong cooling ability. In the real experiments, all of the fabricated textiles show excellent color agreement with the theory. The green fabric containing CsPbBr3 quantum dots achieved a subambient temperature of ∼4.0 °C under direct sunlight with an average solar power density of 850 W/m2. The reddish fabric containing CsPbBrI2 quantum dots also managed to cool 1.5 °C compared to the ambient temperature. The fabric containing CsPbI3 quantum dots failed to achieve subambient cooling with a slightly increased temperature. Nevertheless, all of the fabricated colored fabrics outperformed the regular woven polyester fabric when placed on a human hand. We believed that the proposed colored textiles may widen the range of applications for radiative cooling fabrics and have the potential to become the next-generation colored fabrics with stronger cooling ability.
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Affiliation(s)
- Ji Cao
- Key Laboratory of Advanced Display Materials and Devices, Ministry of Industry and Information Technology, Institute of Optoelectronics & Nanomaterials, College of Material Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Haixiao Xu
- Key Laboratory of Advanced Display Materials and Devices, Ministry of Industry and Information Technology, Institute of Optoelectronics & Nanomaterials, College of Material Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Xiaoming Li
- Key Laboratory of Advanced Display Materials and Devices, Ministry of Industry and Information Technology, Institute of Optoelectronics & Nanomaterials, College of Material Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Yu Gu
- Key Laboratory of Advanced Display Materials and Devices, Ministry of Industry and Information Technology, Institute of Optoelectronics & Nanomaterials, College of Material Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
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10
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Woo HY, Choi Y, Chung H, Lee DW, Paik T. Colloidal inorganic nano- and microparticles for passive daytime radiative cooling. NANO CONVERGENCE 2023; 10:17. [PMID: 37071232 PMCID: PMC10113424 DOI: 10.1186/s40580-023-00365-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 03/29/2023] [Indexed: 06/19/2023]
Abstract
Compared to traditional cooling systems, radiative cooling (RC) is a promising cooling strategy in terms of reducing energy consumption enormously and avoiding severe environmental issues. Radiative cooling materials (RCMs) reduce the temperature of objects without using an external energy supply by dissipating thermal energy via infrared (IR) radiation into the cold outer space through the atmospheric window. Therefore, RC has a great potential for various applications, such as energy-saving buildings, vehicles, water harvesting, solar cells, and personal thermal management. Herein, we review the recent progress in the applications of inorganic nanoparticles (NPs) and microparticles (MPs) as RCMs and provide insights for further development of RC technology. Particle-based RCMs have tremendous potential owing to the ease of engineering their optical and physical properties, as well as processibility for facile, inexpensive, and large area deposition. The optical and physical properties of inorganic NPs and MPs can be tuned easily by changing their size, shape, composition, and crystals structures. This feature allows particle-based RCMs to fulfill requirements pertaining to passive daytime radiative cooling (PDRC), which requires high reflectivity in the solar spectrum and high emissivity within the atmospheric window. By adjusting the structures and compositions of colloidal inorganic particles, they can be utilized to design a thermal radiator with a selective emission spectrum at wavelengths of 8-13 μm, which is preferable for PDRC. In addition, colloidal particles can exhibit high reflectivity in the solar spectrum through Mie-scattering, which can be further engineered by modifying the compositions and structures of colloidal particles. Recent advances in PDRC that utilize inorganic NPs and MPs are summarized and discussed together with various materials, structural designs, and optical properties. Subsequently, we discuss the integration of functional NPs to achieve functional RCMs. We describe various approaches to the design of colored RCMs including structural colors, plasmonics, and luminescent wavelength conversion. In addition, we further describe experimental approaches to realize self-adaptive RC by incorporating phase-change materials and to fabricate multifunctional RC devices by using a combination of functional NPs and MPs.
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Affiliation(s)
- Ho Young Woo
- School of Integrative Engineering, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Yoonjoo Choi
- School of Integrative Engineering, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Hyesun Chung
- School of Integrative Engineering, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Da Won Lee
- School of Integrative Engineering, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Taejong Paik
- School of Integrative Engineering, Chung-Ang University, Seoul, 06974, Republic of Korea.
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11
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Ma B, Cheng Y, Hu P, Fang D, Wang J. Passive Daytime Radiative Cooling of Silica Aerogels. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:467. [PMID: 36770428 PMCID: PMC9919039 DOI: 10.3390/nano13030467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 01/17/2023] [Accepted: 01/20/2023] [Indexed: 06/18/2023]
Abstract
Silica aerogels are one of the most widely used aerogels, exhibiting excellent thermal insulation performance and ultralow density. However, owing to their plenitude of Si-O-Si bonds, they possess high infrared emissivity in the range of 8-13 µm and are potentially robust passive radiative cooling (PRC) materials. In this study, the PRC behavior of traditional silica aerogels prepared from methyltrimethoxysilane (MTMS) and dimethyldimethoxysilane (DMDMS) in outdoor environments was investigated. The silica aerogels possessed low thermal conductivity of 0.035 W/m·K and showed excellent thermal insulation performance in room environments. However, sub-ambient cooling of 12 °C was observed on a clear night and sub-ambient cooling of up to 7.5 °C was achieved in the daytime, which indicated that in these cases the silica aerogel became a robust cooling material rather than a thermal insulator owing to its high IR emissivity of 0.932 and high solar reflectance of 0.924. In summary, this study shows the PRC performance of silica aerogels, and the findings guide the utilization of silica aerogels by considering their application environments for achieving optimal thermal management behavior.
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Affiliation(s)
- Bingjie Ma
- School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei 230026, China
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Yingying Cheng
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Peiying Hu
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Dan Fang
- Suzhou Institute of Metrology, Suzhou, 215128, China
| | - Jin Wang
- School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei 230026, China
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
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12
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Lee SY, Lim H, Bae JH, Chae D, Paik T, Lee H, Oh SJ. Designing a self-classifying smart device with sensor, display, and radiative cooling functions via spectrum-selective response. NANOSCALE HORIZONS 2022; 7:1087-1094. [PMID: 35903990 DOI: 10.1039/d2nh00206j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
This paper presents a self-classifying smart device that intelligently differentiates and operates three functions: electroluminescence display, ultraviolet light sensor, and thermal management via radiative cooling. The optical and electrical properties of the materials and structures are designed to achieve a spectrum-selective response, which enables the integration of the aforementioned functions into one device without any noise or interference. Spectrum-selective materials that absorb, emit, and radiate light with ultraviolet to mid-infrared wavelengths and device structures designed to prevent interference are achieved by using thin metal films, dielectric layers, and nanocrystals. The designed self-classifying smart device exhibits bright blue light emission upon current supply (display), green light emission upon exposure to UV light (sensor), and radiative cooling (thermal management). Furthermore, a smart device and house system with a display, UV light sensor, and radiative cooling performance was demonstrated. The findings of this study open new avenues for device integration in next-generation wearable device fabrication.
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Affiliation(s)
- Sang Yeop Lee
- Department of Materials Science and Engineering, Korea University 145, Anam-ro Seongbuk-gu, Seoul, 02841, Republic of Korea.
| | - Hangyu Lim
- Department of Materials Science and Engineering, Korea University 145, Anam-ro Seongbuk-gu, Seoul, 02841, Republic of Korea.
| | - Jung Ho Bae
- Department of Materials Science and Engineering, Korea University 145, Anam-ro Seongbuk-gu, Seoul, 02841, Republic of Korea.
| | - Dongwoo Chae
- Department of Materials Science and Engineering, Korea University 145, Anam-ro Seongbuk-gu, Seoul, 02841, Republic of Korea.
| | - Taejong Paik
- School of Integrative Engineering, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Heon Lee
- Department of Materials Science and Engineering, Korea University 145, Anam-ro Seongbuk-gu, Seoul, 02841, Republic of Korea.
| | - Soong Ju Oh
- Department of Materials Science and Engineering, Korea University 145, Anam-ro Seongbuk-gu, Seoul, 02841, Republic of Korea.
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Wang X, Zhang Q, Wang S, Jin C, Zhu B, Su Y, Dong X, Liang J, Lu Z, Zhou L, Li W, Zhu S, Zhu J. Sub-ambient full-color passive radiative cooling under sunlight based on efficient quantum-dot photoluminescence. Sci Bull (Beijing) 2022; 67:1874-1881. [DOI: 10.1016/j.scib.2022.08.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 07/09/2022] [Accepted: 08/17/2022] [Indexed: 11/25/2022]
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14
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Zhang Q, Wang S, Wang X, Jiang Y, Li J, Xu W, Zhu B, Zhu J. Recent Progress in Daytime Radiative Cooling: Advanced Material Designs and Applications. SMALL METHODS 2022; 6:e2101379. [PMID: 35212488 DOI: 10.1002/smtd.202101379] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 12/27/2021] [Indexed: 06/14/2023]
Abstract
Passive daytime radiative cooling (PDRC) is emerging as a promising cooling technology. Owing to the high, broadband solar reflectivity and high mid-infrared emissivity, daytime radiative cooling materials can achieve passive net cooling power under direct sunlight. The zero-energy-consumption characteristic enables PDRC to reduce negative environmental issues compared with conventional cooling systems. In this review, the development of advanced daytime radiative cooling designs is summarized, recent progress is highlighted, and potential correlated applications, such as building cooling, photovoltaic cooling, and electricity generation, are introduced. The remaining challenges and opportunities of PDRCs are also indicated. It is expected that this review provides an overall picture of recent PDRC progress and inspires future research regarding the fundamental understanding and practical applications of PDRC.
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Affiliation(s)
- Qian Zhang
- National Laboratory of Solid State Microstructures College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, Frontiers Science Center For Critical Earth Material Cycling, Nanjing University, Nanjing, 210093, P. R. China
- State Key Laboratory of New Textile Materials and Advanced Processing, Technologies, Wuhan Textile University, Wuhan, 430200, P. R. China
| | - Shuaihao Wang
- National Laboratory of Solid State Microstructures College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, Frontiers Science Center For Critical Earth Material Cycling, Nanjing University, Nanjing, 210093, P. R. China
| | - Xueyang Wang
- National Laboratory of Solid State Microstructures College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, Frontiers Science Center For Critical Earth Material Cycling, Nanjing University, Nanjing, 210093, P. R. China
| | - Yi Jiang
- National Laboratory of Solid State Microstructures College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, Frontiers Science Center For Critical Earth Material Cycling, Nanjing University, Nanjing, 210093, P. R. China
| | - Jinlei Li
- National Laboratory of Solid State Microstructures College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, Frontiers Science Center For Critical Earth Material Cycling, Nanjing University, Nanjing, 210093, P. R. China
| | - Weilin Xu
- State Key Laboratory of New Textile Materials and Advanced Processing, Technologies, Wuhan Textile University, Wuhan, 430200, P. R. China
| | - Bin Zhu
- National Laboratory of Solid State Microstructures College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, Frontiers Science Center For Critical Earth Material Cycling, Nanjing University, Nanjing, 210093, P. R. China
| | - Jia Zhu
- National Laboratory of Solid State Microstructures College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, Frontiers Science Center For Critical Earth Material Cycling, Nanjing University, Nanjing, 210093, P. R. China
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15
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Dong S, Wu Q, Zhang W, Xia G, Yang L, Cui J. Slippery Passive Radiative Cooling Supramolecular Siloxane Coatings. ACS APPLIED MATERIALS & INTERFACES 2022; 14:4571-4578. [PMID: 35020361 DOI: 10.1021/acsami.1c22673] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Polymer coatings with comprehensive properties including passive radiative cooling, anti-fouling, and self-healing constitute a promising energy-saving strategy but have not been well documented yet. Herein, we reported a class of novel multifunctional supramolecular polysiloxane composite coatings showing the combination of these features. The coatings have a hybrid structure with a slippery liquid-infused porous surface and a gradient polymer-Al2O3 composite matrix constructed by reversible hydrogen bonding. The gradient matrix consists of a polymer-rich top and a particle-rich bottom favoring coating attachment on rigid substrates. Such a complex structure can be obtained by simply casting the suspending solutions of the polydimethylsiloxane (PDMS)-urea copolymer and Al2O3 on substrates followed by swelling silicone oil. Obtained coatings display good passive daytime radiative cooling (a temperature drop of ∼2 °C), self-healing ability, and anti-fouling properties. Since the comprehensive performances and the facile fabrication, the coatings should have application potential for various thermal management purposes.
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Affiliation(s)
- Shihua Dong
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
| | - Qian Wu
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
| | - Wenluan Zhang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
| | - Guifeng Xia
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China
| | - Li Yang
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Jiaxi Cui
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China
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Yao F, Liu Y, Xu Y, Peng J, Gui P, Liang J, Lin Q, Tao C, Fang G. Room-Temperature Diffusion-Induced Extraction for Perovskite Nanocrystals with High Luminescence and Stability. SMALL METHODS 2021; 5:e2001292. [PMID: 34927924 DOI: 10.1002/smtd.202001292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 02/08/2021] [Indexed: 06/14/2023]
Abstract
Metal halide perovskite nanocrystals (NCs) serve as a kind of ideal semiconductor for luminescence and display applications. However, the optoelectronic performance and stability of perovskite NCs are mainly subjected to current ligand strategies since these ligands exhibit a highly dynamic binding state, which complicates NC purification and storage. Herein, a method named diffusion-induced extraction is developed for crystallization (DEC) at room temperature, in which silicone oil serves as a medium to separate the solvent from perovskite precursors and diethyl ether promotes the nucleation, leading to highly emissive perovskite NCs. The formation mechanism of NCs using this approach is elucidated, and their optoelectronic properties are fully characterized. The resultant NCs ink exhibits a high photoluminescence quantum yield (PLQY) over 90% with a narrow full width at half maximum of 17 nm. The DEC method strengthens the interaction between ligand and NCs via the hydrophobic silicone oil. Therefore, the NCs maintain almost 95% of their initial PLQYs after aging more than seven months in air. The findings will be of great significance for the continued advancement of high PLQY perovskite NCs through a better understanding of formation dynamics. The DEC strategy presents a major step forward for advancing the field of perovskite semiconductor nanomaterials.
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Affiliation(s)
- Fang Yao
- Key Lab of Artificial, Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
| | - Yongjie Liu
- Key Lab of Artificial, Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
| | - Yalun Xu
- Key Lab of Artificial, Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
| | - Jiali Peng
- Key Lab of Artificial, Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
| | - Pengbin Gui
- Key Lab of Artificial, Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
| | - Jiwei Liang
- Key Lab of Artificial, Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
| | - Qianqian Lin
- Key Lab of Artificial, Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
| | - Chen Tao
- Key Lab of Artificial, Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
| | - Guojia Fang
- Key Lab of Artificial, Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
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17
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Banik U, Agrawal A, Meddeb H, Sergeev O, Reininghaus N, Götz-Köhler M, Gehrke K, Stührenberg J, Vehse M, Sznajder M, Agert C. Efficient Thin Polymer Coating as a Selective Thermal Emitter for Passive Daytime Radiative Cooling. ACS APPLIED MATERIALS & INTERFACES 2021; 13:24130-24137. [PMID: 33974398 DOI: 10.1021/acsami.1c04056] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Radiative cooling to subambient temperatures can be efficiently achieved through spectrally selective emission, which until now has only been realized by using complex nanoengineered structures. Here, a simple dip-coated planar polymer emitter derived from polysilazane, which exhibits strong selective emissivity in the atmospheric transparency window of 8-13 μm, is demonstrated. The 5 μm thin silicon oxycarbonitride coating has an emissivity of 0.86 in this spectral range because of alignment of the frequencies of bond vibrations arising from the polymer. Furthermore, atmospheric heat absorption is suppressed due to its low emissivity outside the atmospheric transparency window. The reported structure with the highly transparent polymer and underlying silver mirror reflects 97% of the incoming solar irradiation. A temperature reduction of 6.8 °C below ambient temperature was achieved by the structure under direct sunlight, yielding a cooling power of 93.7 W m-2. The structural simplicity, durability, easy applicability, and high selectivity make polysilazane a unique emitter for efficient prospective passive daytime radiative cooling structures.
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Affiliation(s)
- Udayan Banik
- DLR Institute of Networked Energy Systems, 26129 Oldenburg, Germany
| | - Ashutosh Agrawal
- DLR Institute of Networked Energy Systems, 26129 Oldenburg, Germany
| | - Hosni Meddeb
- DLR Institute of Networked Energy Systems, 26129 Oldenburg, Germany
| | - Oleg Sergeev
- DLR Institute of Networked Energy Systems, 26129 Oldenburg, Germany
| | - Nies Reininghaus
- DLR Institute of Networked Energy Systems, 26129 Oldenburg, Germany
| | | | - Kai Gehrke
- DLR Institute of Networked Energy Systems, 26129 Oldenburg, Germany
| | | | - Martin Vehse
- DLR Institute of Networked Energy Systems, 26129 Oldenburg, Germany
| | - Maciej Sznajder
- DLR Institute of Space Systems, 28359 Bremen, Germany
- MAPEX Center for Materials and Processes, University of Bremen, 28359 Bremen, Germany
| | - Carsten Agert
- DLR Institute of Networked Energy Systems, 26129 Oldenburg, Germany
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