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Modeling of the synergistic anti-reflection effect in gradient refractive index films integrated with subwavelength structures for photothermal conversion.
Phys Chem Chem Phys
April 2024
College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing, 210023, China.
Photothermal materials generally suffer from challenges such as low photothermal conversion efficiency and inefficient full-spectrum utilization of solar energy. This paper proposes gradient refractive index transparent ceramics (GRITCs) integrated with subwavelength nanostructure arrays and simulates the synergistic anti-reflection effect by an admittance recursive model. An innovative subwavelength structure, possessing a superior light-trapping capability, is initially crafted based on this model.
View Article and Find Full Text PDFA crystalline silicon thin-film solar cell with a three-layer sinusoidal grating structure is studied. The structure has a double-layer antireflection layer, and the three-layer grating is located in the double-layer antireflection layer and the passivation layer, respectively. The related parameters of the grating structure are optimized by scanning using finite-difference time-domain.
View Article and Find Full Text PDFMultifunctional electromagnetic (EM) metasurfaces are capable of manipulating electromagnetic waves with kaleidoscopic functions flexibly, which will significantly enhance integration and applications of electronic systems. However, most known design schemes only realize the reflection or transmission functions under a specific angle range, which wastes the other half EM space and restricts wider applications of multifunctional metadevices. Herein, an encouraging strategy of broadband and wide-angle EM wavefronts generator is proposed to produce two independent functions, i.
View Article and Find Full Text PDFIndustrial applications of sol-gel derived coatings.
J Solgel Sci Technol
December 2022
Monroeville Business and Technology Center, PPG Industries, Inc., 440 College Park Drive, Monroeville, PA 15146 USA.
Sol-gel derived coatings have many practical applications in different industries. In this paper, HI-GARD hard coat, multi-layer antireflective coatings, and an anti-glare coating with organic particles are described. Optical and mechanical performances of these coatings are discussed in addition to adhesion properties.
View Article and Find Full Text PDFWe aimed to strengthen the antireflection coating of low refractive index, by using spinodal porous films based on phase separation of sodium borosilicate glass. Coating films were prepared by printing a glass paste onto a silica substrate, and melting at temperatures from 900°C to 1000°C, allowing phase separation at 600°C and finally etching to porosities of ∼60. Coating with reflections as low as 0.
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