Search Results - "extraction efficiency"
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Enhancing Light Extraction Efficiency in Micro-LEDs via Metal Photonic Crystals in the Passivation Layer and Air Photonic Crystals on the n-GaN Side
Published 2025-01-01Subjects: Get full textPhotonic 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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The Impact of Resonance on the Light Extraction Efficiency of Single Nanowire Ultraviolet Light Emitting Diodes
Published 2020-01-01Subjects: Get full textFabricating 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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Studying the solid-liquid extraction of enzyme amylase: influence of type of solvent, temperature, contact time and their interrelationship
Published 2025-07-01Subjects: Get full textAmylases 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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Light Extraction Efficiency of GaN-Based Micro-Scale Light-Emitting Diodes Investigated Using Finite-Difference Time-Domain Simulation
Published 2020-01-01Subjects: Get full textWe 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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The Effect of Sapphire Substrates on Omni-Directional Reflector Design for Flip-Chip Near-Ultraviolet Light-Emitting Diodes
Published 2019-01-01Subjects: Get full textIn 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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Study on Packaging Technology of GAGG:Ce Scintillation Detector
Published 2025-01-01Subjects: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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Enhancement of Yellow Light Extraction Efficiency of Y <sub>3</sub>Al <sub>5</sub>O <sub>12</sub>:Ce <sup>3+</sup> Ceramic Converters Using a 2-D TiO <sub>2</sub> Hexagonal-...
Published 2016-01-01Subjects: Get full textThe effects of 2-D hexagonal-lattice TiO <sub>2</sub> photonic crystal layers on the directional light extraction efficiency of low-scattering (Y <sub>1-x</sub>Ce <sub>x</sub>) <sub>3</sub>Al <sub>5</sub>O <sub>12</sub> (YAG:Ce...
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Effects of Inclined Sidewall Structure With Bottom Metal Air Cavity on the Light Extraction Efficiency for AlGaN-Based Deep Ultraviolet Light-Emitting Diodes
Published 2017-01-01Subjects: Get full textAn 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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Enhancing Both TM- and TE-Polarized Light Extraction Efficiency of AlGaN-Based Deep Ultraviolet Light-Emitting Diode via Air Cavity Extractor With Vertical Sidewall
Published 2018-01-01Subjects: Get full textIn 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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Innovative Approaches to Extracting Phenolics from <i>Echinacea purpurea</i>: Maximizing Yield and Efficacy
Published 2025-06-01Subjects: Get full textPeople 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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Insights Into the Influence of Sidewall Morphology on the Light Extraction Efficiency of Mini-LEDs
Published 2019-01-01Subjects: “…Light extraction efficiency…”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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Enhanced Output Power of Light-Emitting Diodes With Embedded Air-Gap Photonic Crystals by Nanosphere Lithography
Published 2017-01-01Subjects: Get full textLarge-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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Separations of Strategic Metals from Spent Electronic Waste Using “Green Methods”
Published 2025-06-01Subjects: Get full textNext-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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Solvent extraction of europium(III) from technogenic solutions with the use of surfactants
Published 2020-09-01Subjects: Get full textObjectives. 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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Quantifying green innovation: A bibliometric analysis of deep eutectic solvents and applications as eco-friendly solvents
Published 2025-12-01Subjects: Get full textDeep 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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Optical Tunneling to Improve Light Extraction in Quantum Dot and Perovskite Light-Emitting Diodes
Published 2020-01-01Subjects: Get full textAn 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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Modeling of Optical Processes in Thin-Film IR Light-Emitting Diode Based on Colloidal PbS Quantum Dots
Published 2025-07-01Subjects: Get full textThe 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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Light Extraction Efficiency Analysis of Flip-Chip Ultraviolet Light-Emitting Diodes With Patterned Sapphire Substrate
Published 2018-01-01Subjects: “…polarization-dependent light extraction efficiency…”This study investigates polarization-dependent light extraction efficiency (<italic>η</italic><sub>extraction </sub>) of AlGaN-based flip-chip ultraviolet (UV) light-emitting diodes (LEDs) emitting at 230 nm and 280 nm with microdome-shaped patterning on...
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Enhanced the Optical Power of AlGaN-Based Deep Ultraviolet Light-Emitting Diode by Optimizing Mesa Sidewall Angle
Published 2018-01-01Subjects: Get full textIn 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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Enhancing Reservoir Modeling via the Black Oil Model for Horizontal Wells: South Rumaila Oilfield, Iraq
Published 2025-07-01Subjects: Get full textHorizontal 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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