Results 1 to 10 of about 33,807 (161)

Bacterial Hybrid Light-Emitting Diodes. [PDF]

open access: yesAdv Mater
AbstractPhoton down‐converting filters with fluorescent proteins (FPs) are a new frontier in the quest for rare‐earth‐free and non‐toxic color filters for white light‐emitting diodes. There are, however, concerns related to the FP purification costs and lack of FP recyclability/reuse.
Ferrara S   +3 more
europepmc   +3 more sources

A Review of Light-Emitting Diodes and Ultraviolet Light-Emitting Diodes and Their Applications

open access: yesPhotonics
This paper presents an extensive literature review on Light-Emitting Diode (LED) fundamentals and discusses the historical development of LEDs, focusing on the material selection, design employed, and modifications used in increasing the light output. It
Trailokya Bhattarai   +2 more
doaj   +2 more sources

Bidirectional light-emitting diode as a visible light source driven by alternating current

open access: yesNature Communications, 2023
Gallium nitride-based light-emitting diodes have revolutionized the lighting market by becoming the most energy-efficient light sources. However, the power grid, in example electricity delivery system, is built based on alternating current, which raises ...
Mikołaj Żak   +10 more
doaj   +1 more source

Anomalous efficiency elevation of quantum-dot light-emitting diodes induced by operational degradation

open access: yesNature Communications, 2023
Quantum-dot light-emitting diodes promise a new generation of high-performance and solution-processed electroluminescent light sources. Understanding the operational degradation mechanisms of quantum-dot light-emitting diodes is crucial for their ...
Siyu He   +10 more
doaj   +1 more source

Extracting the inherent ideality factor of a diode from electrical current–voltage characteristics

open access: yesElectronics Letters, 2023
The ideality factor of a diode gives the information on the current conduction or recombination processes occurring inside the device. The ideality factor obtained from the electrical current–voltage (I–V) characteristics by the conventional method is ...
Jaehyeok Park   +4 more
doaj   +1 more source

Josephson Light-Emitting Diode [PDF]

open access: yesPhysical Review Letters, 2010
We consider an optical quantum dot where an electron level and a hole level are coupled to respective superconducting leads. We find that electrons and holes recombine producing photons at discrete energies as well as a continuous tail. Further, the spectral lines directly probe the induced superconducting correlations on the dot.
Recher, P. (author)   +2 more
openaire   +4 more sources

Enhancing the Light Extraction Efficiency in Micro‐Organic Light‐Emitting Diodes with Metalens

open access: yesAdvanced Photonics Research, 2021
Due to the total internal reflection caused by the mismatch of the refractive indices between organic layers and oxide layers within an organic light‐emitting diode (OLED), most of the light energy is trapped inside the device; if the size of an OLED is ...
Jingen Lin   +6 more
doaj   +1 more source

Critical role of electrons in the short lifetime of blue OLEDs

open access: yesNature Communications, 2023
Designing robust blue organic light-emitting diodes is a long-standing challenge in the display industry. The highly energetic states of blue emitters cause various degradation paths, leading to collective luminance drops in a competitive manner. However,
Jaewook Kim   +14 more
doaj   +1 more source

Magnetoelectroluminescence in organic light-emitting diodes [PDF]

open access: yesThe Journal of Chemical Physics, 2016
The magnetoelectroluminescence of conjugated organic polymer films is widely accepted to arise from a polaron pair mechanism, but their magnetoconductance is less well understood. Here we derive a new relationship between the experimentally measurable magnetoelectroluminescence and magnetoconductance and the theoretically calculable singlet yield of ...
Joseph E. Lawrence   +3 more
openaire   +5 more sources

Emergence of Nanoplatelet Light-Emitting Diodes [PDF]

open access: yesMaterials, 2018
Since 2014, nanoplatelet light-emitting diodes (NPL-LEDs) have been emerged as a new kind of LEDs. At first, NPL-LEDs are mainly realized by CdSe based NPLs. Since 2016, hybrid organic-inorganic perovskite NPLs are found to be effective to develop NPL-LEDs. In 2017, all-inorganic perovskite NPLs are also demonstrated for NPL-LEDs.
Xiao, Peng   +6 more
openaire   +3 more sources

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