Results 1 to 10 of about 2,639,047 (328)

Tautomeric mixture coordination enables efficient lead-free perovskite LEDs

open access: yesNature, 2023
Lead-free perovskite light-emitting diodes (LEDs) prepared using tautomeric mixture coordination provide improved ordering in the crystal structure, reduced recombination and enhanced exciton binding energy compared with lead-containing perovskite-based ...
Dongyuan Han   +19 more
semanticscholar   +1 more source

LED–LED portable oxygen gas sensor [PDF]

open access: yesAnalytical and Bioanalytical Chemistry, 2012
A portable instrument for oxygen determination, based on the quenching of phosphorescent octaethylporphyrin by gaseous O(2), has been developed using the fluorimetric paired emitter-detector diode technique (FPEDD). The instrument configuration consists of two light-emitting diodes (LEDs) facing each other, with an interchangeable support containing a ...
Perez de Vargas-Sansalvador, Isabel M.   +5 more
openaire   +4 more sources

High-speed multiwavelength InGaAs/InP quantum well nanowire array micro-LEDs for next generation optical communications

open access: yesOpto-Electronic Science, 2023
Miniaturized light sources at telecommunication wavelengths are essential components for on-chip optical communication systems. Here, we report the growth and fabrication of highly uniform p-i-n core-shell InGaAs/InP single quantum well (QW) nanowire ...
Fanlu Zhang   +12 more
doaj   +1 more source

Defect Passivation in Lead‐Halide Perovskite Nanocrystals and Thin Films: Toward Efficient LEDs and Solar Cells

open access: yesAngewandte Chemie, 2021
Lead‐halide perovskites (LHPs), in the form of both colloidal nanocrystals (NCs) and thin films, have emerged over the past decade as leading candidates for next‐generation, efficient light‐emitting diodes (LEDs) and solar cells.
Junzhi Ye   +5 more
semanticscholar   +1 more source

Cyclopentadienone triisocyanide iron complexes: general synthesis and crystal structures of tris(2,6-dimethylphenyl isocyanide)(η4-tetraphenylcyclopentadienone)iron and tris(naphthalen-2-yl isocyanide)(η4-tetraphenylcyclopentadienone)iron acetone hemisolvate

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2023
Irradiation of a toluene solution containing cyclopentadienone tricarbonyl iron complexes and isocyanides with blue LEDs afforded the formation and isolation of 12 triisocyanide complexes, two of which, namely tris(2,6-dimethylphenyl isocyanide)(η4 ...
André Bütikofer, Peter Chen
doaj   +1 more source

Hybrid Impedance-Admittance Control for Upper Limb Exoskeleton Using Electromyography

open access: yesApplied Sciences, 2020
Exoskeletons are wearable mobile robots that combine various technologies to enable limb movement with greater strength and endurance, being used in several application areas, such as industry and medicine.
Lucas D. L. da Silva   +4 more
doaj   +1 more source

Application of wide-spectrum light-emitting diodes in the indoor production of cucumber and tomato seedlings

open access: yesActa Agrobotanica, 2023
Horticulture is now revolutionized by advancements in light-emitting diode (LED) lighting. New technologies enable knowledge expansion on how plants require different spectral illumination for optimal growth and development.
Alicja Tymoszuk   +5 more
doaj   +1 more source

Self-assembled monolayer–based blue perovskite LEDs

open access: yesScience Advances, 2023
Blue perovskite light-emitting diodes (LEDs) have shown external quantum efficiencies (EQEs) of more than 10%; however, devices that emit in the true blue—those that accord with the emission wavelength required for Rec. 2100 primary blue—have so far been
Ya‐Kun Wang   +18 more
semanticscholar   +1 more source

A Cost Analysis of Implementing a Blockchain Architecture in a Smart Grid Scenario Using Sidechains

open access: yesSensors, 2020
Smart grid systems have become popular and necessary for the development of a sustainable power grid. These systems use different technologies to provide optimized services to the users of the network.
Iago Sestrem Ochôa   +5 more
doaj   +1 more source

Energy­Saving Lighting of Agricultural Premises and its Parameters Calculation

open access: yesСельскохозяйственные машины и технологии, 2021
he properly selected lighting for livestock farms is noted to ensure the optimal productivity of bred animals and poultry and to generate profit for the enterprise.
L. Yu. Yuferev
doaj   +1 more source

Home - About - Disclaimer - Privacy