Results 11 to 20 of about 141,115 (264)

Two-Dimensional Transient Temperature Distribution Measurement of GaN Light-Emitting Diode Using High Speed Camera

open access: yesIEEE Journal of the Electron Devices Society, 2021
We put forward a non-contact method for determining the transient two-dimensional (2D) temperature distribution of light emitting diodes (LEDs).
Guangheng Xiao   +8 more
doaj   +1 more source

The Optical Effects of Capping Layers on the Performance of Transparent Organic Light-Emitting Diodes

open access: yesIEEE Photonics Journal, 2012
In transparent organic light-emitting diodes (TOLEDs), the asymmetry in the optical paths causes difference between the bottom and top emitting lights, both in emissions and spectral distributions.
Jin Woo Huh   +9 more
doaj   +1 more source

Lattice modulation strategies for 2D material assisted epitaxial growth

open access: yesNano Convergence, 2023
As an emerging single crystals growth technique, the 2D-material-assisted epitaxy shows excellent advantages in flexible and transferable structure fabrication, dissimilar materials integration, and matter assembly, which offers opportunities for novel ...
Qi Chen   +7 more
doaj   +1 more source

Investigation of Efficiency and Droop Behavior Comparison for InGaN/GaN Super Wide-Well Light Emitting Diodes Grown on Different Substrates

open access: yesIEEE Photonics Journal, 2014
In this work, efficiency droop of InGaN/GaN multiple-quantum-well LEDs with super wide well (WW) is discussed by comparing the external quantum efficiency (EQE) of GaN grown on sapphire and FS-GaN substrates.
Tongbo Wei   +11 more
doaj   +1 more source

Is the Light too Light? [PDF]

open access: yes, 2012
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
VILASI, SILVIA   +3 more
openaire   +6 more sources

Investigation of Isoelectronic Doping in p-GaN Based on the Thermal Quenching of UVL Band

open access: yesIEEE Photonics Journal, 2016
In this paper, isoelectronic doping with indium (In) in p-GaN is investigated on the basis of the thermal quenching of ultraviolet luminescence (UVL) band.
Yang Huang   +7 more
doaj   +1 more source

Required Visibility Level for Reliable Object Detection during Nighttime Road Traffic in Non-Urban Areas

open access: yesApplied Sciences, 2023
Motor vehicle headlamps are the only light sources that create visibility conditions for the driver in nighttime non-urban traffic. Therefore, a suitable design of these lighting systems is of the highest relevance to allow the driver an early detection ...
Anil Erkan   +6 more
doaj   +1 more source

Opportunities of energy saving in lighting systems for public buildings

open access: yesRenewable Energy and Sustainable Development, 2017
The lighting system provides many options for cost-effective energy saving with low or no inconvenience. Lighting improvements are excellent investments in most public buildings, it is usually cost-effective to address because lighting improvements are ...
Ayman Abd El-khalek   +2 more
doaj   +1 more source

A Transmission-Type Testing System for Measuring Optical Characteristics of Phosphors for Remote-Phosphor-Based White LEDs

open access: yesIEEE Photonics Journal, 2016
In this paper, we have proposed a transmission-type testing system for determining optical characteristics of remote-phosphor plates in white light-emitting diodes (WLEDs).
Sijia Dang   +9 more
doaj   +1 more source

Determination of Speed-Dependent Roadway Luminance for an Adequate Feeling of Safety at Nighttime Driving

open access: yesVehicles, 2021
The purpose of this work is to determine as a function of velocity the minimal roadway luminance that is required to be judged as being bright enough for a driver to perform a nighttime driving task with an adequate feeling of safety. In this context, it
Anil Erkan   +5 more
doaj   +1 more source

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