Results 61 to 70 of about 8,247 (230)
IEEE Photonics Journal, 2018 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 ...
Yonghui Zhang +8 more
doaj +1 more source
IEEE Photonics Journal, 2020 In this work, we have investigated the origin of efficiency droop for AlGaN-based deep ultraviolet light-emitting diodes (DUV LEDs). We find that the efficiency droop is likely to be caused by the electron leakage for DUV LEDs studied in this work.
Chunshuang Chu +7 more
doaj +1 more source
Crystals, 2022 Planar, nanopillar and Al nanosphere structure AlGaN-based deep-ultraviolet light-emitting diodes (DUV-LEDs) were numerically investigated via a three-dimensional finite difference time domain (3D FDTD) method.
Xiaolong Hu +3 more
doaj +1 more source
Luminescent behavior of the K2SiF6:Mn4+ red phosphor at high fluxes and at the microscopic level [PDF]
, 2016 Phosphor-converted white light-emitting diodes (LEDs) are becoming increasingly popular for general lighting. The non-rare-earth phosphorK(2)SiF(6): Mn4+, showing promising saturated red d-d-line emission, was investigated.
Joos, Jonas +5 more
core +2 more sources
Mean-field optimal control and optimality conditions in the space of probability measures [PDF]
, 2020 We derive a framework to compute optimal controls for problems with states in the space of probability measures. Since many optimal control problems constrained by a system of ordinary differential equations (ODE) modelling interacting particles converge
Burger, Martin +3 more
core +2 more sources
Scalar modifications to gravity from unparticle effects may be testable
, 2007 Interest has focussed recently on low energy implications of a nontrivial scale invariant sector of an effective field theory with an IR fixed point, manifest in terms of ``unparticles'' with peculiar properties.
Goldberg, Haim, Nath, Pran
core +1 more source
Hybrid remote quantum dot/powder phosphor designs for display backlights [PDF]
, 2017 Quantum dots are ideally suited for color conversion in light emitting diodes owing to their spectral tunability, high conversion efficiency and narrow emission bands.
Abé, Sofie +4 more
core +1 more source
Planar unclustered scale-free graphs as models for technological and biological networks
, 2009 Many real life networks present an average path length logarithmic with the number of nodes and a degree distribution which follows a power law. Often these networks have also a modular and self-similar structure and, in some cases - usually associated ...
Chen, Lichao +3 more
core +1 more source
Advanced Healthcare Materials, EarlyView.Here, we present a novel 3D cell patterning and culture platform. The “Floor‐Ceiling‐Chip” (FC‐Chip) consists of two opposing track‐etched membranes, creating a pseudo‐3D microenvironment for the cells in between. By providing the membranes with micropatterned cell‐adhesive islands of varying geometries and sizes, the FC‐Chip enables control over cell ...
Urandelger Tuvshindorj +10 more
wiley +1 more source
Micromachines, 2022 The trap states and defects near the active region in deep-ultraviolet (DUV) light-emitting diodes (LED) were investigated through wavelength-dependent photocurrent spectroscopy.
Seungyoung Lim +6 more
doaj +1 more source