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Light-emitting diode (LED)

Design and optimization of a light-emitting diode projection micro-stereolithography three-dimensional manufacturing system

Design and optimization of a light-emitting diode projection micro-stereolithography three-dimensional manufacturing system

... The rapid manufacture of complex three-dimensional micro-scale components has eluded researchers for decades. Several additive manufacturing options have been limited by either speed or the ability to fabricate true ...

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High speed pulsed electrical spin injection in spin-light emitting diode

High speed pulsed electrical spin injection in spin-light emitting diode

... spin-relaxation process. In addition, it is established that the electron spin polarization reaches its maximum value before the first 700 ps of the EL emission. The spin-polarized light emitting ...

4

Commercialization of Quantum Dot White Light Emitting Diode technology

Commercialization of Quantum Dot White Light Emitting Diode technology

... Quantum Dot white LED (QD WLED) technology may be one of the best choices, due to its higher energy efficiency, larger color render in index, better versatility and more[r] ...

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A nanoplatelet-based light emitting diode and its use for all-nanocrystal LiFi-like communication

A nanoplatelet-based light emitting diode and its use for all-nanocrystal LiFi-like communication

... up to 35000 cd.m -2 . We study the low-temperature performance of the LED and find that there is a delay of droop in terms of current density as temperature decreases. In the last part of the paper, we design a large LED ...

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Light-emitting diode pumped luminescent concentrators: a new opportunity for low-cost solid-state lasers

Light-emitting diode pumped luminescent concentrators: a new opportunity for low-cost solid-state lasers

... High-power light-emitting diodes (LEDs) today are twice as powerful as four years ago while meantime their price has been divided by 4 making them promising sources for laser ...LEDs emitting 190 ...

5

3.3 µm interband-cascade resonant-cavity light-emitting diode with narrow spectral emission linewidth

3.3 µm interband-cascade resonant-cavity light-emitting diode with narrow spectral emission linewidth

... for top contacts and another Si 3 N 4 passivation layer were deposited. Finally, a two-pair ZnS/Ge dielectric Bragg mirror was deposited by RF sputtering and patterned by a lift-off process. The reflectivity seen from ...

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Towards rare-earth-free white light-emitting diode devices based on the combination of dicyanomethylene and pyranine as organic dyes supported on zinc single-layered hydroxide

Towards rare-earth-free white light-emitting diode devices based on the combination of dicyanomethylene and pyranine as organic dyes supported on zinc single-layered hydroxide

... Conclusion We have successfully developed luminescent composite films based on the mixture of a single-layered hydroxide and organic luminescent dyes. The organic dyes dicyanomethylene and pyranine were chosen according ...

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Identifying and evaluating aging signatures in light emitting diode lighting systems

Identifying and evaluating aging signatures in light emitting diode lighting systems

... eutectic sample and (b) silver paste sample . ........................................................ 42 Figure I.53: (a) Delamination and (b) curling of phosphor coated LED package . ...

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Fabrication and characterization of a germanium nanowire light emitting diode

Fabrication and characterization of a germanium nanowire light emitting diode

... characterization appeared to be slightly lower than the lattice temperature estimated from the temperature dependency of the bandgap energy. We can speculate that locally within the recombination region the temperature ...

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Heat Dissipation in Flexible Nitride Nanowire Light-Emitting Diodes

Heat Dissipation in Flexible Nitride Nanowire Light-Emitting Diodes

... * Correspondence: maria.tchernycheva@c2n.upsaclay.fr Received: 15 October 2020; Accepted: 12 November 2020; Published: date Abstract: We analyze the thermal behavior of a flexible nanowire (NW) ...

11

Charge Recombination in Phosphorescent Organic Light-Emitting Diode Host–Guest Systems through QM/MM Simulations

Charge Recombination in Phosphorescent Organic Light-Emitting Diode Host–Guest Systems through QM/MM Simulations

... Organic light-emitting diodes (OLEDs) have attracted signicant attention for broad applications in displays and lighting because of their high electroluminescence (EL) eciency, exibility and low ...

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Ultrawide-bandwidth, superluminescent light-emitting diodes using InAs quantum dots of tuned height

Ultrawide-bandwidth, superluminescent light-emitting diodes using InAs quantum dots of tuned height

... An ultrawide-bandwidth, superluminescent light-emitting diode (SLED) utilizing multiple layers of dots of tuned height is reported. Due to thermal effect, the superluminescent phenomenon is observed ...

4

Light emitting fabrics for Photodynamic Therapy: technology, experimental and clinical applications

Light emitting fabrics for Photodynamic Therapy: technology, experimental and clinical applications

... of light sources delivering a broad range of more or less adapted light ...these light sources do not in fact deliver a uniform light distribution to the ...

20

All-vacuum-deposited inorganic cesium lead halide perovskite light-emitting diodes

All-vacuum-deposited inorganic cesium lead halide perovskite light-emitting diodes

... To evaluate the LED performance, current density–voltage– luminance (J–V–L), EQE-voltage characteristics, and external quantum efficiency spectra are recorded and shown in Fig. 4 . The J–V characteristics [ Fig. 4(a) ] ...

8

Design and implementation of top-contact light-emitting diodes integrated on silicon

Design and implementation of top-contact light-emitting diodes integrated on silicon

... voltage curve is not that for a diode. Hence, the first scenario is not the case. Has the Au in the upper contact spiked through the active region? Examination o[r] ...

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Doped and non-doped organic light-emitting diodes based on a yellow carbazole emitter into a blue-emitting matrix.

Doped and non-doped organic light-emitting diodes based on a yellow carbazole emitter into a blue-emitting matrix.

... __________________ * Corresponding author Indeed, these materials have been widely used in optoelectronics [13] and particularly as emitters in OLEDs by several of us [14-17]. The main goal of our work is turned towards ...

8

Bottom-up honeycomb top layer for light outcoupling enhancement in blue organic light emitting diodes

Bottom-up honeycomb top layer for light outcoupling enhancement in blue organic light emitting diodes

... as light outcoupling layers for OLEDs. Low light outcoupling efficiency is an important limiting factor in the OLED technology, especially for blue devices that inherently su ffer from lower photoluminescence ...

9

Highly efficient multilayer organic pure-blue-light emitting diodes with substituted carbazoles compounds in the emitting layer.

Highly efficient multilayer organic pure-blue-light emitting diodes with substituted carbazoles compounds in the emitting layer.

... can not be completely ruled out [24], and dopant excitation could arise from a better electron-hole recombination with the carbazole compounds playing the role of the carrier traps according to the trap mechanism [25]. ...

14

AlxGa1-xN and AlN nanowires : a solution for efficient UV-C light emitting diodes

AlxGa1-xN and AlN nanowires : a solution for efficient UV-C light emitting diodes

... UV Light emitting diodes (LEDs) based on Al x Ga 1-x N material are nowadays gaining particular attention due to their potential for replacing mercury lamps, currently used for sterilization and water ...

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Blending Ionic Liquids to Ir Complexes for Applications in Light-Emitting Electrochemical Cells (LEECs)

Blending Ionic Liquids to Ir Complexes for Applications in Light-Emitting Electrochemical Cells (LEECs)

... 1.4.2 Electroluminescence To describe electroluminescence, we can start with various types of processes that happen in the EL phenomenon. The three major components of the EL process are: the use of an electrical bias ...

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