Evaluation of low-emissivity coatings with single, double, and triple silver layers

Herguedas, Natalia; Carretero, Enrique

doi:10.1016/j.solmat.2023.112592

Cited by 2 publications

(2 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the spectral transmittance of the coatings can be meticulously controlled. Interference optical coatings enhance the optical properties of surfaces and are extensively applied in the production of antireflective coatings, optical filters, low-emissivity glasses, and more [ 16 , 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Germanium-Based Optical Coatings for Aesthetic Enhancement with Low Radiofrequency Attenuation

Carretero,

Chueca,

Alonso

2024

Nanomaterials

Self Cite

View full text Add to dashboard Cite

This work focused on developing optical coatings for decorative applications that remain transparent in the radiofrequency range. To achieve this, a combination of dielectric material (silicon-aluminum nitride, SiAlNx) and low-electrical-conductivity semiconductor material (germanium) was utilized. Germanium plays a crucial role in providing absorption in the visible spectrum, facilitating the design of coatings with various aesthetic appearances, while allowing for control over their transmittance. The optical properties of thin germanium layers were thoroughly characterized and leveraged to create multilayer designs with diverse aesthetic features. Different multilayer structures were designed, fabricated, and optically characterized, resulting in coatings with metallic gray, black, or various colors in reflection, while retaining the ability to transmit visible light for illumination and signaling applications. Finally, the radiofrequency attenuation of the developed coatings was measured, revealing negligible attenuation; this is in stark contrast to the metallic coatings used for decorative purposes, which can attenuate by up to 30 dB.

show abstract

Section: Introductionmentioning

confidence: 99%

Germanium-Based Optical Coatings for Aesthetic Enhancement with Low Radiofrequency Attenuation

Carretero,

Chueca,

Alonso

2024

Nanomaterials

Self Cite

View full text Add to dashboard Cite

show abstract

“…Thermal emittance is a fundamental property that quantifies the radiant energy a surface emits in comparison to an ideal blackbody at the same temperature. It plays a pivotal role in assessing the energy transfer and efficiency of thermal systems, such as solar absorbers (Caldarelli et al, 2023;Herguedas and Carretero, 2023), building insulation materials (Das et al, 2023;Jelle et al, 2015), and heat exchangers (Mahmoudinezhad et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Thermal Emittance Measurement of Very Low-Emissive Materials for Solar Thermal Applications

Gaudino,

Farooq,

Caldarelli

et al. 2024

Preprint

View full text Add to dashboard Cite

In the quest for more efficient solar thermal systems, accurately determining the thermal emittance of low-emissive materials is crucial in determining the power losses. This paper describes the calorimetric method designed to precisely measure the thermal emittance of Selective Solar Absorbers (SSAs) to be used in High Vacuum Flat Plate Collectors (HVFPCs). The method's capability is demonstrated through the successful correction of thermal emittance values for copper samples of varying sizes, including dimensions down to 49 cm². Results highlight the method's potential to significantly reduce measurement errors associated with small-size and/or low-emittance samples, providing a path forward to improve the design and efficiency of SSAs. This research marks a significant step in advancing solar thermal technology by enabling emittance measurements with a precision better than 0.003, which is essential for the development of high-performance solar thermal absorbers. The method has also been applied to correct the thermal emittance value of SSA measured in previous measurement campaigns, and it allows a better estimation of the SSA efficiency conversion curve.

show abstract

Evaluation of low-emissivity coatings with single, double, and triple silver layers

Cited by 2 publications

References 27 publications

Germanium-Based Optical Coatings for Aesthetic Enhancement with Low Radiofrequency Attenuation

Germanium-Based Optical Coatings for Aesthetic Enhancement with Low Radiofrequency Attenuation

Thermal Emittance Measurement of Very Low-Emissive Materials for Solar Thermal Applications

Contact Info

Product

Resources

About