Decorative near-infrared transmission filters featuring high-efficiency and angular-insensitivity employing 1D photonic crystals

AbstractTo fabricate a high-efficiency polycrystalline thin-film tandem cell, the most critical work is to make a high-efficiency top cell (>15%) with high bandgap (Eg=1.5-1.8 eV) and high transmission (T>70%) in the near-infrared (NIR) wavelength region. The CdTe cell is one of the candidates for the top cell, because CdTe state-of-the-art single-junction devices with efficiencies of more than 16% are available, although its bandgap (1.48 eV) is slightly lower for a top cell in a dual-junction device. In this paper, we focus on the development of an ultra-thin, low-bandgap CuxTe transparent back-contact to produce high-efficiency CdTe cells with high NIR transmission. We have achieved an NREL-confirmed 13.9%-efficient CdTe transparent solar cell with an infrared transmission of ~50% and a CdTe/CIS polycrystalline mechanically stacked thin-film tandem cell with an NREL-confirmed efficiency of 15.3%.

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High efficiency GaN-based LEDs: light extraction by photonic crystals

Annales de Physique ◽

10.1051/anphys:2007003 ◽

2006 ◽

Vol 31 (6) ◽

pp. 1-235 ◽

Cited By ~ 9

Author(s):

A. David

Keyword(s):

Photonic Crystals ◽

High Efficiency ◽

Light Extraction

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High-Efficiency Responsive Smart Windows Fabricated by Carbon Nanotubes Modified by Liquid Crystalline Polymers

Crystals ◽

10.3390/cryst11040440 ◽

2021 ◽

Vol 11 (4) ◽

pp. 440

Author(s):

Yuan Deng ◽

Shi-Qin Li ◽

Qian Yang ◽

Zhi-Wang Luo ◽

He-Lou Xie

Keyword(s):

Carbon Nanotubes ◽

Liquid Crystalline ◽

Near Infrared ◽

High Efficiency ◽

Polymer Brush ◽

Light Transmittance ◽

Smart Window ◽

Vertical Orientation ◽

Smart Windows ◽

Conversion Materials

Smart windows can dynamically and adaptively adjust the light transmittance in non-energy or low-energy ways to maintain a comfortable ambient temperature, which are conducive to efficient use of energy. This work proposes a liquid crystal (LC) smart window with highly efficient near-infrared (NIR) response using carbon nanotubes grafted by biphenyl LC polymer brush (CNT-PDB) as the orientation layer. The resultant CNT-PDB polymer brush can provide the vertical orientation of LC molecules to maintain the initial transparency. At the same time, the smart window shows a rapid response to NIR light, which can quickly adjust the light transmittance to prevent sunlight from entering the room. Different from common doping systems, this method avoids the problem of poor compatibility between the LC host and photothermal conversion materials, which is beneficial for improving the durability of the device.

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Origin of High-Efficiency Near-Infrared Organic Thermally Activated Delayed Fluorescence: The Role of Electronic Polarization

The Journal of Physical Chemistry C ◽

10.1021/acs.jpcc.0c09582 ◽

2021 ◽

Vol 125 (2) ◽

pp. 1249-1255

Author(s):

Taiping Hu ◽

Zeyi Tu ◽

Guangchao Han ◽

Yuanping Yi

Keyword(s):

Near Infrared ◽

High Efficiency ◽

Delayed Fluorescence ◽

Electronic Polarization ◽

Thermally Activated Delayed Fluorescence ◽

Thermally Activated

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Antireflective and Superhydrophilic Structure on Graphite Written by Femtosecond Laser

Micromachines ◽

10.3390/mi12030236 ◽

2021 ◽

Vol 12 (3) ◽

pp. 236

Author(s):

Rui Lou ◽

Guangying Li ◽

Xu Wang ◽

Wenfu Zhang ◽

Yishan Wang ◽

...

Keyword(s):

Femtosecond Laser ◽

Near Infrared ◽

High Efficiency ◽

Electronic Devices ◽

Sample Surface ◽

Graphite Surface ◽

Hazardous Substances ◽

Functional Surface ◽

Nano Structures ◽

Average Reflectance

Antireflection and superhydrophilicity performance are desirable for improving the properties of electronic devices. Here, we experimentally provide a strategy of femtosecond laser preparation to create micro-nanostructures on the graphite surface in an air environment. The modified graphite surface is covered with abundant micro-nano structures, and its average reflectance is measured to be 2.7% in the ultraviolet, visible and near-infrared regions (250 to 2250 nm). The wettability transformation of the surface from hydrophilicity to superhydrophilicity is realized. Besides, graphene oxide (GO) and graphene are proved to be formed on the sample surface. This micro-nanostructuring method, which demonstrates features of high efficiency, high controllability, and hazardous substances zero discharge, exhibits the application for functional surface.

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Estimation of composition of quinoa ( Chenopodium quinoa Willd.) grains by Near-Infrared Transmission spectroscopy

LWT ◽

10.1016/j.lwt.2017.01.026 ◽

2017 ◽

Vol 79 ◽

pp. 126-134 ◽

Cited By ~ 5

Author(s):

Christian Encina-Zelada ◽

Vasco Cadavez ◽

Jorge Pereda ◽

Luz Gómez-Pando ◽

Bettit Salvá-Ruíz ◽

...

Keyword(s):

Near Infrared ◽

Chenopodium Quinoa ◽

Infrared Transmission ◽

Transmission Spectroscopy

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Application of near Infrared Transmission Spectroscopy for the Determination of Some Quality Parameters of Apples

Journal of Near Infrared Spectroscopy ◽

10.1255/jnirs.47 ◽

1994 ◽

Vol 2 (4) ◽

pp. 213-221 ◽

Cited By ~ 26

Author(s):

T. Lovász ◽

P. Merész ◽

A. Salgó

Keyword(s):

Dry Matter ◽

Near Infrared ◽

Matter Content ◽

Dry Matter Content ◽

Quality Factors ◽

Infrared Transmission ◽

Transmission Method ◽

Titratable Acid ◽

Transmission Spectroscopy ◽

Relative Standard

The acceptability of near infrared (NIR) transmission spectroscopy for the prediction of six quality factors of apples (firmness, refractive index, pH, titratable acid, dry matter and alcohol insoluble solids content) was investigated. The effects of storage conditions, cultivars and season on the accuracy of the NIR transmission method were also studied during the experiment. The accuracy of the calibration of all investigated parameters decreased during storage. The alteration of the characteristics of the spectra is possibly due to changes in the chemical composition and structure of apples between September and April. The calibration method was improved by developing a separate calibration for each cultivar per year. The calibrations of the different parameters are season-dependent except for the dry matter content. Using outlier diagnostics, the prediction accuracy can be generally improved by about 10%. The coefficient of variation for each parameter is compatible with the relative standard deviation for the reference methods except for the titratable acid content, showing the applicability of NIR transmission techniques. A relationship seems to exist between the maturity and the NIR transmission spectra of the apple.

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