Enhancement of Light Extraction Efficiency of UVC-LED by SiO2 Antireflective Film

Wang, Yu; Lv, Zhenxing; Qi, Shengli; Liu, Yazhu; Long, Hao

doi:10.3390/cryst12070928

Cited by 7 publications

(2 citation statements)

References 27 publications

(28 reference statements)

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“…One obstacle to the diversification of LED‐IF‐based devices is the efficiency of UVC LEDs (200−280 nm). Compared with the mature technology of blue LEDs, UVC‐LEDs suffer from weak optical output power (Wang et al., 2022), which makes it difficult to obtain sufficient fluorescence emissions from food samples. However, numerous fluorophores in food products, such as aromatic amino acids and nucleic acids (Lenhardt et al., 2017); anthocyanins (Trivittayasil et al., 2016); capsaicinoids (Monago‐Maraña et al., 2018); other fluorophores, such as melamine (Barreto et al., 2021); and fluoroquinolone antibiotics (Ouyang et al., 2020), need to be induced in the UVC region.…”

Section: Conclusion and Prospectsmentioning

confidence: 99%

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Toward commercial applications of LED and laser‐induced fluorescence techniques for food identity, quality, and safety monitoring: A review

Peng

et al. 2023

Comp Rev Food Sci Food Safe

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The assessment of food safety and quality is a matter of paramount importance, especially considering the challenges posed by climate change. Convenient, eco‐friendly, and non‐destructive techniques have attracted extensive attention in the food industry because they can retain food safety and quality. Fluorescence radiation, the process by which fluorophore emits light upon the absorption of ultraviolet or visible light, offers the advantages of high sensitivity and selectivity. The use of excitation–emission matrix (EEM) has been extensively explored in the food industry, but on‐site detection of EEMs remain a challenge. To address this limitation, laser‐induced fluorescence (LIF) and light emitting diode‐induced fluorescence (LED‐IF) have been implemented in many cases to facilitate the transition of fluorescence measurements from the laboratory to commercial applications. This review provides an overview of the application of commercially available LIF/LED‐IF devices for non‐destructive food measurement and recent studies that focus on the development of LIF/LED‐IF devices for commercial applications. These studies were categorized into two stages: the preliminary exploration stage, which emphasizes the selection of an appropriate excitation wavelength based on the combination of EEM and chemometrics, and the pre‐application stage, where experiments were conducted on scouting with specific excitation wavelength. Although commercially available devices have emerged in many research fields, only a limited number have been reported for use in the food industry. Future studies should focus on enhancing the diversity of test samples and parameters that can be measured by a single device, exploring the application of LIF techniques for detecting low‐concentration substances in food, investigating more quantitative approaches, and developing embedded computing devices.

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Section: Conclusion and Prospectsmentioning

confidence: 99%

“…While most studies detected samples at the single-kernel level (Paghaleh et al, 2015;Smeesters et al, 2015Smeesters et al, , 2016Wu & Xu, 2019, 2020, Wang et al (2022) attempted to detect rice samples at the bulk level. Intact rice samples were placed in quartz cuvettes for fluorescence acquisition.…”

Section: 25mentioning

confidence: 99%

Toward commercial applications of LED and laser‐induced fluorescence techniques for food identity, quality, and safety monitoring: A review

Peng

et al. 2023

Comp Rev Food Sci Food Safe

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Structure design for light‐extraction enhancement of UVC‐LED

Liu,

Wei

2024

Nano Select

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UVC‐LEDs have drawn attention recently because of their benefits to sterilization, decontamination, etc. Since the internal quantum efficiency and light extraction efficiency (LEE) of UVC‐LEDs are low, their external quantum efficiency remains unsatisfied. To enhance the LEE, this study proposes an integration design with the features of substrate‐thickness optimization, substrate shaping, diffuse‐reflective coating, an index‐matching layer, and taper‐base optimization. In addition to optical modeling via ray tracing, thermal modeling is conducted to evaluate both the optical and thermal performances of each feature. The simulation results show that, by means of the combination of these features, the LEE of the chip can be raised from 18.5% to more than 40%, and the average temperature of the device can be lowered by 2.2°C via the design of the diffuse‐reflective coating.

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Photonic enhanced flexible photothermoelectric generator using MXene coated fullerenes modified PEDOT:PSS films for solar energy harvesting

Wang,

Sha,

Xiao

et al. 2024

Chemical Engineering Journal

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Enhancement of Light Extraction Efficiency of UVC-LED by SiO2 Antireflective Film

Cited by 7 publications

References 27 publications

Toward commercial applications of LED and laser‐induced fluorescence techniques for food identity, quality, and safety monitoring: A review

Toward commercial applications of LED and laser‐induced fluorescence techniques for food identity, quality, and safety monitoring: A review

Structure design for light‐extraction enhancement of UVC‐LED

Photonic enhanced flexible photothermoelectric generator using MXene coated fullerenes modified PEDOT:PSS films for solar energy harvesting

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