Fabry–Perot resonance assisted dual-layer coating with enhanced wavelength-selective refection and emission for daytime radiative cooling

Wang, Lei; Zheng, Zhiheng; Gou, Yuchun; Liang, Wenwen; Yu, Wei

doi:10.1016/j.optcom.2020.126673

Cited by 13 publications

(7 citation statements)

References 44 publications

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“…This calculation does not account for nonradiative heat transfer power. When taking into account the nonradiative heat transfer coefficient of 6.9, the film is capable of achieving a cooling effect of 10 K below the ambient temperature. ,,,, These results demonstrate the strong potential of the film for practical cooling applications.…”

Section: Resultsmentioning

confidence: 74%

“…In recent years, extensive research has been conducted on the DRC of organic materials. − However, these materials are prone to reduced service life due to issues such as photothermal degradation and peeling. In contrast, inorganic materials possess excellent infrared selectivity and high thermal stability, making them more suitable for DRC. − One-dimensional photonic crystals (1D PhCs) are widely used in DRC due to their unique artificial band gap. The utilization of 1D PhC structures allows for effective selective radiation in the atmospheric window.…”

Section: Introductionmentioning

confidence: 99%

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Inorganic Multilayer Film with High Infrared Selective Emission Enhanced by SiN_x for Daytime Radiative Cooling

Liu,

Sun,

Ren

et al. 2024

ACS Appl. Energy Mater.

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Inorganic multilayer films of radiative cooling can overcome issues like photothermal degradation and lack of selectivity in the infrared spectrum, which are common limitations of widely used radiative cooling organic materials. However, there are few reports about inorganic multilayer films with either excellent cooling performance or a simple structure that is easy to prepare and suitable for microdevices. In this work, we propose an inorganic multilayer film strategy that adopts a simple film structure, namely, SiN x /(L/H/L/H)/SiN x /Ag/glass(substrate) (where L and H represent low and high refractive index materials, respectively), to achieve high performance of daytime radiative cooling. The complexity of one-dimensional photonic crystal structures was reduced for the first time using SiN x . The film structure utilizes impedance mismatch to enhance solar reflection and complementary spectral contributions between different materials to enhance emissivity in the atmospheric window. The effectiveness of this design was demonstrated by using a multilayer film composed of SiO 2 , TiO 2 , and SiN x . This film possesses a high reflectivity of 91.6% in the solar spectrum and selective radiation in the atmospheric window (8−13 μm) with an emissivity of 90.9%, which should have been the highest emissivity in the reported radiative cooling inorganic multilayer films so far. Our calculation shows that the film temperature can achieve a steady-state temperature of 10 K below the ambient temperature under common solar radiation. The prepared multilayer film is tested under real outdoor temperature conditions, demonstrating significant subambient cooling effects. This study thus introduces an effective strategy for daytime radiative cooling using inorganic multilayer films with high performance.

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Section: Resultsmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Inorganic Multilayer Film with High Infrared Selective Emission Enhanced by SiN_x for Daytime Radiative Cooling

Liu,

Sun,

Ren

et al. 2024

ACS Appl. Energy Mater.

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“…The better result was in the case of mixture accurate grating values, whereas the results show that it exhibits excellent unidirectional properties. Therefore, such broadband and unidirectional properties of the proposed precision grating structure can be widely used in a thin film PV field [32].…”

Section: Solar Cell J-v Characteristicsmentioning

confidence: 99%

“…The light trapping effect is mainly attributed to Fabry-Pérot resonance modes due to the large index contrast between air and GaAs layer, which is ubiquitous in the thin film layer [32]. While for simple trapezoidal grating, the waveguide mode resonance or leaky-mode resonance effects lead to light trapping and increase the absorption in the active layer [28].…”

Section: Parametric Effectmentioning

confidence: 99%

Ultra-precision trapezoidal grating mixture of photonic crystal’s effect on enhancing the optoelectronic properties of thin film GaAs solar cell

Sadoun¹,

Mouetsi²,

Hocini³

2021

Phys. Scr.

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The IV semiconductor materials have a pivotal role in photovoltaic (PV) systems. Research on the optimal grating structure has attracted a lot of interest because of its potential application in light-trapping in thin film PV cells. The Photonic Crystals (PCs) with their nano-engineered feature which allowed them to obtain high efficiency solar cells in particular from a parametric aspect. By using the Rigorous Coupled Wave Analysis (RCWA) method by RSoft CAD software, a Gallium arsenide (GaAs) thin film is studied with a simple trapezoidal grating of PCs to improve optical absorption with height, width and the mixed ultra-precision grating variations taking into account the J-V solar cell characteristics. According to our simulation results and compared to the planar grating, an enhancement in the power conversion efficiency (η) of 53.72% with a one dimensional PCs grating, and a 115.36% improvement with a simple trapezoidal grating. Furthermore, by mixing the ultra-precision values of the gratings we have an enhancement of 147.25% in height variation and 151.04% in width variation, with a noticeable improvement in the width effect compared to the height that reached up to 58.22%.

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“…[54] The combination of a carefully designed dielectric layer, such as silica (SiO 2 ), silicon nitride (Si 3 N 4 ), hafnium dioxide (HfO 2 ), magnesium fluoride (MgF 2 ), and titanium dioxide (TiO 2 ), with a high solar reflectivity coating, such as silver (Ag) and aluminum (Al), can not only achieve high emissivity in the atmospheric window, but also effectively reflect the energy of the sunlight. [13,14,[55][56][57][58][59][60][61] The research of radiative cooler composed of multilayered inorganic films was first reported by Raman et al [13] It was followed by research works focusing on inorganic materials. [62][63][64][65][66] Rephaeli et al [14] for the first time proposed a model of metal-dielectric photonic PDRC structure.…”

Section: Multilayered Inorganic Materialsmentioning

confidence: 99%

Recent Advances in Material Engineering and Applications for Passive Daytime Radiative Cooling

Cao

et al. 2022

Advanced Optical Materials

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Figure 1. Outline of the current review of PDRC. The inner layer represents the essential factors that dictate the performance of the PDRC emitter, whereas the middle layer includes the representative types of materials for constructing the PDRC emitter, and the outer layer represents various realworld applications of the PDRC emitter. In the middle layer: multilayered inorganic materials (reproduced with permission. [13]

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Fabry–Perot resonance assisted dual-layer coating with enhanced wavelength-selective refection and emission for daytime radiative cooling

Cited by 13 publications

References 44 publications

Inorganic Multilayer Film with High Infrared Selective Emission Enhanced by SiN_x for Daytime Radiative Cooling

Inorganic Multilayer Film with High Infrared Selective Emission Enhanced by SiN_x for Daytime Radiative Cooling

Ultra-precision trapezoidal grating mixture of photonic crystal’s effect on enhancing the optoelectronic properties of thin film GaAs solar cell

Recent Advances in Material Engineering and Applications for Passive Daytime Radiative Cooling

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Fabry–Perot resonance assisted dual-layer coating with enhanced wavelength-selective refection and emission for daytime radiative cooling

Cited by 13 publications

References 44 publications

Inorganic Multilayer Film with High Infrared Selective Emission Enhanced by SiNx for Daytime Radiative Cooling

Inorganic Multilayer Film with High Infrared Selective Emission Enhanced by SiNx for Daytime Radiative Cooling

Ultra-precision trapezoidal grating mixture of photonic crystal’s effect on enhancing the optoelectronic properties of thin film GaAs solar cell

Recent Advances in Material Engineering and Applications for Passive Daytime Radiative Cooling

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Inorganic Multilayer Film with High Infrared Selective Emission Enhanced by SiN_x for Daytime Radiative Cooling

Inorganic Multilayer Film with High Infrared Selective Emission Enhanced by SiN_x for Daytime Radiative Cooling