Six-spectral antireflection coating on zinc sulfide simultaneously effective for the visible, near-IR, and long wavelength IR regions

Zhang, Yinhua; Xiong, Shanxin; Huang, Wei; Zhang, Kepeng; Tian, Xiaoxi

doi:10.1016/j.surfcoat.2018.12.049

Cited by 6 publications

(4 citation statements)

References 17 publications

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“…The results show that: (1) The transmittance of the grating with a period of 50-200 nm is higher than that of a flat film. The lowest point of the grating transmittance spectrum moves to the longwave direction as the period increases from 300 to 600 nm, and the ratio of the period to the wavelength corresponding to the lowest transmittance point ranges from 0.8 to 0.9.…”

Section: Discussionmentioning

confidence: 94%

“…Improving the photoelectric conversion efficiency for solar cells has been a hot research topic, especially for space solar cells. It is one of the important methods to prepare thin films or special optical structures on the surface of solar cells, to enhance the absorption of photons by the cells and to improve the photoelectric conversion efficiency, such as various forms of anti-reflection film [1][2][3], suede light-trapping structures [4,5], porous structures [6][7][8], etc. The transmittance spectrum of a single-layer anti-reflection film is generally an inverted U-shape, that is, there is a peak transmittance, and the antireflection effect is only obvious within a small certain wavelength range.…”

Section: Introductionmentioning

confidence: 99%

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Design and Preparation of Anti-Reflection Nanoarray Structure on the Surface of Space Solar Cell Glass Cover

et al. 2023

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Space solar cell glass covers require high radiation resistance and wide-spectrum high light transmittance. The existing research on the preparation of thin films or special optical structures on the surface of solar cells rarely involves systematic research and the precise control of the high transmittance structural parameters of specific spectral bands by glass covers. Nanoarray structures were designed and constructed on high-purity quartz glass covers, achieving high anti-reflection within the 350–1100 nm range, the high energy part of the solar spectrum on Mars, regardless of the preparation of antireflective film and its radiation resistance. First, G-Solver software package was used to establish a nanoarray structure model according to the equivalent medium theory, and the effects of structural parameters such as the grating period, grating depth, and duty cycle on the glass cover transmittance were investigated. The results show that when the grating period is 50–200 nm, the transmittance ranges from 97.8% to 99.9%. When the grating period further increases from 300 nm, the lowest point of the transmittance spectrum moves to the longwave direction, and the transmittance from 350 nm to the lowest transmittance point significantly reduces. The optimal grating depth is 500 nm for a 300 nm grating period, the transmittance at 350 nm reaches 88.91%, and the average transmittance is 98.23%. When the period is 300 nm and the depth is 500 nm, the optimal duty cycle is 0.67, the transmittance at 350 nm reaches 96.52%, and the average transmittance is 99.23%. Nanoarray structures were constructed on the glass covers with nanoimprint and plasma etching, then modified with atomic layer deposition (ALD) to adjust their depth and duty cycle. The influence rules of the grating period, depth, and duty cycle on the cover transmittance from the experimental results are basically consistent with those from the simulation calculation. The nanoarray structure increases the average transmittance within 350–1100 nm of the glass cover by an average of 2.02% and the peak transmittance by 2.66%. The research results and experimental methods of this study have application value and promotion prospects for improving the photoelectric conversion efficiency of space solar cells and ground solar cells.

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Section: Discussionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Design and Preparation of Anti-Reflection Nanoarray Structure on the Surface of Space Solar Cell Glass Cover

et al. 2023

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“…Therefore, a dichroic beamsplitter (as shown in Figure 1) coated on the infrared detector with both laser protection and MIR-AR functions is particularly important for protecting infrared photoelectric detection systems. Specifically, the dichroic beamsplitter must have three key characteristics: (1) a high LIDT in the laser band to protect the detector [8]; (2) high transmittance in the MIR region to improve the detection efficiency of the detector [9,10]; and (3) excellent environmental stability to ensure that the optical components can withstand the impacts of temperature, sand, acid, alkali, and other harsh environments. Amotchkina et al [11] developed near-infrared (770-1050 nm) and mid-infrared (4-8 µm) beamsplitters with high spectral efficiency using ZnS and YbF3 materials.…”

Section: Introductionmentioning

confidence: 99%

A Dichroic Beamsplitter for the Laser Protection of Infrared Detectors

et al. 2022

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The design and fabrication approach of a dichroic beamsplitter to meet the protection requirements of infrared detectors for blinding laser weapons is presented. The dichroic beamsplitter must protect against 1064 and 532 nm lasers and have high transmittance in the detection beam band of 3.6–4.7 µm. In order to realize the protection and antireflection (AR) functions of the dichroic beamsplitter, Ta2O5, which has a wide band gap and high thermodynamic stability, was selected as the high-refractive-index material. A multilayer stack was deposited on a silicon substrate by ion-assisted electron beam evaporation. The manufactured dichroic beamsplitter features a high laser-induced damage threshold (LIDT), excellent spectral characteristics in the requested spectral region, and good environmental stability.

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“…YbF 3 is an important multispectral optical film with low optical loss, good mechanical properties and good environmental adaptability [1], which has been widely used in highperformance antireflection films [2][3][4][5], high-reflection mirrors [6], high-power infrared laser films [7][8][9] and high-efficiency beamsplitters [10,11].…”

Section: Introductionmentioning

confidence: 99%

Properties of the YbF3 Films Prepared by Ion-Assisted Deposition

Sun¹,

Bai²,

He³

et al. 2022

Coatings

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The purpose of this study is to characterize the microstructure, composition, optical properties and residual stress of YbF3 films. The films were deposited by ion-assisted deposition at different ion energy. The SEM images showed that the surface of the film was uniform and smooth. The XRD patterns showed that the YbF3 films presented an amorphous microstructure. XPS measurement revealed that the ratio of F and Yb reduced with increasing ion energy. The optical constants of the films were determined from the whole optical spectrum. The refractive index increased with the ion energy. Due to the decrease in the amount of F, non-stoichiometric films were formed, and the visible light absorption of the films increased with increasing ion energy. Higher ion energy could increase the packing density, resulting in a decrease in the moisture absorption of the film. The films exhibited tensile stress. The value of residual stress increased with increasing ion energy, since moisture adsorption had an important effect on the residual stress.

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Six-spectral antireflection coating on zinc sulfide simultaneously effective for the visible, near-IR, and long wavelength IR regions

Cited by 6 publications

References 17 publications

Design and Preparation of Anti-Reflection Nanoarray Structure on the Surface of Space Solar Cell Glass Cover

Design and Preparation of Anti-Reflection Nanoarray Structure on the Surface of Space Solar Cell Glass Cover

A Dichroic Beamsplitter for the Laser Protection of Infrared Detectors

Properties of the YbF3 Films Prepared by Ion-Assisted Deposition

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