Résultats de la recherche - "extraction efficiency"

Photonic crystals (PhCs), as a type of metamaterial, have attracted significant attention due to their ability to control light propagation to enhance the light extraction efficiency (LEE) of Micro-LEDs. However, the current advancements in improving the LEE of Micro-LED with PhCs are far from 100&a...

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Fabricating the nanowire ultraviolet light emitting diodes (UV LEDs) has been a promising candidate to dramatically enhance the external quantum efficiency (EQE) of UV LEDs. For a great luminescent performance, it is necessary to understand the propagating features of light inside the nanowire. The...

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Amylases are one of the most essential and widely used enzymes in a number of industries, including food, fermentation, paper, textile and pharmaceutical. The industrial production of enzyme amylase is carried out using two methods which are submerged fermentation and solid-state fermentation. The i...

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We conducted a systematic investigation of the light extraction efficiency (LEE) of GaN-based vertical micro-scale light-emitting diode (μ-LED) structures using three-dimensional finite-difference time-domain (FDTD) simulations. The LEE of μ-LED structures was found to have a s...

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In this paper, we investigate the effect of omni-directional reflectors (ODRs) on the light extraction efficiency (LEE) for flip-chip near-ultraviolet light-emitting diodes (LEDs) on patterned (PSS) and flat sapphire substrate (FSS) using three-dimensional finite-difference time-domain method. Diffe...

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GAGG:Ce scintillation crystal has a wide application prospect in the field of energy spectrum detection, due to its high density, high light yield, radiation resistance and non-deliquination characteristics. The performance of the GAGG:Ce scintillator detector is limited, especially its energy resol...

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The effects of 2-D hexagonal-lattice TiO ₂ photonic crystal layers on the directional light extraction efficiency of low-scattering (Y _1-xCe _x) ₃Al ₅O ₁₂ (YAG:Ce...

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An inclined sidewall scattering structure with air cavity characterized by a metal bottom and flat parallel top (Bottom_metal) is proposed to enhance the light extraction efficiency (LEE) for AlGaN-based deep ultraviolet light-emitting diodes (DUV LEDs). Compared to the reported sidewall metal incli...

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In this work, we investigate the effect of sidewall angle, height and space of an air cavity extractor (AC-Extractor) on the polarization-dependent light extraction efficiency (LEE) for AlGaN-based deep-ultraviolet light-emitting diodes (DUV LEDs) using three-dimensional finite difference time-domai...

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People have long been interested in plants rich in secondary metabolites and have tried to isolate them outside the plants. Purple coneflower is a crucial medicinal plant, known for its broad spectrum of bioactive substances. The type of solvent and the duration of maceration had an important impact...

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We systemically investigated the influence of sidewall morphology change based on TMAH etching on the optical performance of mini-LEDs. The dominant feature of prism structures on the sidewall of mini-LEDs with TMAH etching treatment varied from inhomogeneous to homogeneous as the TMAH etching time...

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Large-scale two-dimensional air-gap photonic crystals (PhCs) were embedded in an n-type GaN layer to enhance the light emission of GaN-based light-emitting diodes (LEDs). The embedded-PhCs were obtained through overgrowth on n-GaN templates, which had air holes array previously fabricated by using n...

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Next-generation recycling technologies must be urgently innovated to tackle huge volumes of spent batteries, photovoltaic panels or printed circuit boards (WPCBs). Current e-waste recycling industrial technology is dominated by traditional recycling technologies. Herein, ionic liquids (ILs), deep eu...

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Objectives. The extraction and separation of rare-earth metals is a complicated process that requires a multidisciplinary and detailed investigation. Liquid-liquid extraction with the use of surfactant, along with the thermodynamic analysis of the parameters is considered a promising approach. The e...

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Deep eutectic solvents (DESs) have emerged as a promising class of green solvents, with various advantages over traditional organic solvents and ionic liquids. This study presents a comprehensive bibliometric analysis of research trends and developments in applying DES as eco-friendly solvents. Usin...

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An effective strategy based on optical tunneling is developed to significantly improve the efficiency of quantum dots light-emitting diodes (QLEDs) and perovskite light-emitting diodes (PeLEDs). Contrary to the common impression that the hole transport layers (HTL) with low refractive index will sev...

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The optical processes in the structure of a thin-film IR LED have been simulated using the finite difference method in the time domain. The parameters such as transmission and propagation efficiency of electromagnetic waves in the range of 1.2–1.4 μm have been investigated. A control device with an...

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This study investigates polarization-dependent light extraction efficiency (<italic>&#x03B7;</italic>_extraction) of AlGaN-based flip-chip ultraviolet (UV) light-emitting diodes (LEDs) emitting at 230 nm and 280&#x00A0;nm with microdome-shaped patterning on...

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In this work, we propose and optimize the sidewalls for the mesa to enhance the optical power for AlGaN-based deep ultraviolet light-emitting diodes (LEDs). We obtain the mesa with the inclined sidewalls by conducting dry etching. The optical performance for LED devices with different inclination an...

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Horizontal wells have revolutionized hydrocarbon production by enhancing recovery efficiency and reducing environmental impact. This paper presents an enhanced Black Oil Model simulator, written in Visual Basic, for three-dimensional two-phase (oil and water) flow through porous media. Unlike most e...

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