Artificial inverted compound eye structured polymer films with light-harvesting and self-cleaning functions for encapsulated III–V solar cell applications

Leem, Jung Woo; Yu, Jae Su

doi:10.1039/c5ra05991g

Cited by 36 publications

(17 citation statements)

References 64 publications

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“…In a previous work 28 , we produced surface nanocomposites of PMMA/TiO 2 by loading the polymer surface with TiO 2 nanoparticles prior to the thermal NIL step of the moth-eye topography. A different approach to improve the mechanical resistance, has been to modify the geometry by making pore-like inverse moth-eye nanostructures 29 , 30 . The improvement of mechanical resistance and the resulting optical quality, compared to moth-eye nanostructures, has been determined numerically and experimentally, and it was demonstrated that inverted nanocones were able to sustain a higher mechanical stress while retaining a good optical antireflective performance 31 , 32 .…”

Section: Introductionmentioning

confidence: 99%

Bioinspired antireflective flexible films with optimized mechanical resistance fabricated by roll to roll thermal nanoimprint

Jacobo-Martín

Rueda

Hernández

et al. 2021

Sci Rep

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This work describes the fabrication process of moth eye antireflective poly (methyl methacrylate) transparent films via roll to roll thermal nanoimprint lithography. The process parameters are investigated and adjusted in order to obtain from a single moth-eye structured mold, a range of antireflective topographies that gradually vary their geometry from protruding to intruding nanocones. A correlation between the process parameters with the optical and mechanical properties of the films is established to illustrate the influence of the processing parameters and serve as guideline to produce antireflective flexible films with balanced properties and optimized performance adequate to the application environment. A finite element model is described predicting the mechanical behavior of the moth-eye PMMA imprinted nanostructures.

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Section: Introductionmentioning

confidence: 99%

Bioinspired antireflective flexible films with optimized mechanical resistance fabricated by roll to roll thermal nanoimprint

Jacobo-Martín

Rueda

Hernández

et al. 2021

Sci Rep

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“…The introduction of the pre-patterned microcone array is particularly advantageous in overcoming the limit given by the incident angle. [51,52,53] As shown in Figure 3b,c, fluctuation of broadband (400-800 nm) reflectance of the Au/h-Nanoturf on μ-cone array with respect to the incident angle of solar spectrum is notably diminished in the case with microcone array (Figure 3c) when compared to flat Au/nanoturf (Figure 3b). In addition, the Au/h-Nanoturf on μ-cone array exhibited further decreased reflectance over the range of the broadband spectrum.…”

Section: Resultsmentioning

confidence: 89%

Omnidirectional, Broadband Light Absorption in a Hierarchical Nanoturf Membrane for an Advanced Solar‐Vapor Generator

Kim

Kang

Lee

et al. 2020

Adv Funct Materials

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Solar‐thermal materials have been intensively studied in the context of production and localization of thermal energy, targeting an industry level application. Although photonic and optical strategies for enhancing light absorption have increased the efficiency of photo excitation/conversion into thermal energy, most of them have several limitations such as large area fabrication, thermal stability and broadband/omnidirectional light absorption. In this study, a gold‐coated hierarchical nanoturf membrane (Au/h‐Nanoturf membrane) incorporated with randomly distributed high aspect ratio (AR) nanostructures and micro‐through holes is proposed. The Au/h‐Nanoturf has peculiar black structures that provide advantages in forming a membrane with a large area and in absorbing broadband solar light spectrum. Furthermore, the membrane is combined with micro‐cone array which makes it exhibit exceptionally omnidirectional light absorption properties. Using computational analysis, it is confirmed that the micro‐cone array substantially contributes to the omnidirectional solar absorption irrespective of the wavelength. The optimized structural parameters for the maximum efficiency of the solar‐thermal materials are also found. The prepared solar‐vapor generator with the optimized structural features exhibits 91% average conversion efficiency under one sun condition. The efficiency is sustainable for up to four weeks. The highly efficient and omnidirectional broadband‐absorbing solar‐thermal membrane can be readily employed, targeting an industry level application.

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“…The ommatidia located on the same circumference of a circle are assumed to be located on the same level. They have the same focal length and view angle [ 22 ]. The imaging performance is improved as the imaging spherical aberration reduced to almost 1% of the initial value.…”

Section: Structure Design For Curved Surface Compound Eyesmentioning

confidence: 99%

Fabrication and Characterization of Inhomogeneous Curved Artificial Compound Eye

Liu

Diao

et al. 2018

Micromachines

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Compared with the conventional compound eye processing method, a new fabrication method—namely, a mold casting method—was presented. This method is simple, low-cost, easy to implement, and can be reused. A bionic compound eye array model with 61 ommatidia arranged inhomogeneously onto a curved surface was fabricated. The curved surface had a radius of 9 mm and a thickness of 0.5 mm. The margin imaging quality was improved significantly by the analysis of light beam focus and the optical imaging properties of the fabricated compound eye. The sub-image of each ommatidium had a high resolution. There was 5% error between the collecting spot brightness and simulation analysis results, which proved that the production method is feasible.

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Artificial inverted compound eye structured polymer films with light-harvesting and self-cleaning functions for encapsulated III–V solar cell applications

Abstract: Inverted compound eye structured polydimethylsiloxane (i.e., ICESs PDMS) antireflection layer enhances the solar power generation of encapsulated III–V solar cells.

Cited by 36 publications

References 64 publications

Bioinspired antireflective flexible films with optimized mechanical resistance fabricated by roll to roll thermal nanoimprint

Bioinspired antireflective flexible films with optimized mechanical resistance fabricated by roll to roll thermal nanoimprint

Omnidirectional, Broadband Light Absorption in a Hierarchical Nanoturf Membrane for an Advanced Solar‐Vapor Generator

Fabrication and Characterization of Inhomogeneous Curved Artificial Compound Eye

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