Results 31 to 40 of about 156,807 (282)

Electrostatic Field Effect Light-Emitting Diode

open access: yesIEEE Photonics Journal, 2020
Gallium Nitride (GaN) based light-emitting diodes (LEDs) suffer from the persistent issue of high resistivity of the p-type layer, due to inefficient dopant activation at room temperature.
Matthew Hartensveld   +2 more
doaj   +1 more source

Production of Chlorella vulgaris Biomass in Tubular Photobioreactors during Different Culture Conditions

open access: yesApplied Sciences, 2021
Biomass of microalgae and the components contained in their cells can be used for the production of heat, electricity, and biofuels. The aim of the presented study was to determine the optimal conditions that will be the most favorable for the production
Patryk Ratomski, Małgorzata Hawrot-Paw
doaj   +1 more source

Microphotonic parabolic light directors fabricated by two-photon lithography [PDF]

open access: yes, 2011
We have fabricated microphotonic parabolic light directors using two-photon lithography, thin-film processing, and aperture formation by focused ion beam lithography. Optical transmission measurements through upright parabolic directors 22 μm high and 10 
Atwater, H. A.   +8 more
core   +1 more source

Coherence properties of different light sources and their effect on the image sharpness and speckle of holographic displays

open access: yesScientific Reports, 2017
Coherence properties of different light sources and how they affect the image quality of holographic display are investigated. Temporal coherence is related to the intrinsic spectrum bandwidth of the light source, while spatial coherence can be affected ...
Yuanbo Deng, Daping Chu
doaj   +1 more source

Luminescence enhancement by symmetry-breaking in the excited state in radical organic light-emitting diodes

open access: yesCommunications Chemistry, 2023
Organic π-conjugated radicals have recently joined the ranks of high-efficiency light-emitting materials; however, their light-emission mechanism is still a matter of debate.
Satoru Ohisa, Satoshi Honda
doaj   +1 more source

Nonlinear symmetry breaking in photo-metamaterials

open access: yes, 2017
We design and analyze photo-metamaterials with each meta-atom containing both photodiode and light-emitting diode. Illumination of the photodiode by the light-emitting diode gives rise to an additional optical feedback within each unit cell, which ...
Belov, Pavel A.   +4 more
core   +1 more source

Quantitative analysis of pixel crosstalk in AMOLED displays [PDF]

open access: yes, 2018
The resolution of organic light-emitting diode (OLED) displays is increasing steadily as these displays are adopted for mobile and virtual reality (VR) devices.
Altazin, Stéphane   +5 more
core   +1 more source

Machine vision based in-process light-emitting diode chip mounting system

open access: yesMeasurement + Control, 2018
Background: In this study, a machine vision–based method was developed for automated in-process light-emitting diode chip mounting lines with position uncertainty.
Chao-Ching Ho, You-Min Chen, Po-Chieh Li
doaj   +1 more source

A Wiener process–based remaining life prediction method for light-emitting diode driving power in rail vehicle carriage

open access: yesAdvances in Mechanical Engineering, 2019
Remaining life prediction is an effective way to optimize maintenance strategy and improve service life for light-emitting diode driving power in rail vehicle carriage.
Zhi Gao   +4 more
doaj   +1 more source

Blue light-emitting diode based on ZnO

open access: yes, 2005
A near-band-edge bluish electroluminescence (EL) band centered at around 440 nm was observed from ZnO p-i-n homojunction diodes through a semi-transparent electrode deposited on the p-type ZnO top layer.
Chichibu, Shigefusa F.   +7 more
core   +1 more source

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