Results 21 to 30 of about 3,503,170 (292)

Absorbance based light emitting diode optical sensors and sensing devices [PDF]

open access: yes, 2008
The ever increasing demand for in situ monitoring of health, environment and security has created a need for reliable, miniaturised sensing devices. To achieve this, appropriate analytical devices are required that possess operating characteristics of ...
O'Toole, Martina   +5 more
core   +2 more sources

Mixed halide perovskites for spectrally stable and high-efficiency blue light-emitting diodes

open access: yesNature Communications, 2021
Achieving bright and efficient blue emission in metal halide perovskite light-emitting diodes has proven to be challenging. Here, the authors demonstrate high EQE and spectrally stable blue light-emitting diodes based on mixed halide perovskites, with ...
Max Karlsson   +18 more
doaj   +1 more source

Sr[Li2Al2O2N2]:Eu2+—A high performance red phosphor to brighten the future

open access: yesNature Communications, 2019
Developing innovative materials for reduced energy consumption in phosphor converted white light-emitting diodes remains a challenge. Here, the authors report a narrow band red-emitting oxonitride material with a highly symmetrical Sr2 + coordination for
Gregor J. Hoerder   +16 more
doaj   +1 more source

White light emitting diode based on purely organic fluorescent to modern thermally activated delayed fluorescence (TADF) and perovskite materials

open access: yesNano Convergence, 2019
White organic/polymer light emitting diode (WOLED/WPLED) processed from solution has attracted significant research interest in recent years due to their low device production cost, device flexibility, easy fabrication over large area including roll to ...
Dipjyoti Das   +4 more
doaj   +1 more source

Reducing the impact of Auger recombination in quasi-2D perovskite light-emitting diodes

open access: yesNature Communications, 2021
Designing efficient perovskite light-emitting diodes remains a challenge due to the strong Auger recombination and resulting Joule heating. Here, the authors propose polarizable p-fluorophenethylammonium to generate quasi-2D perovskites with reduced ...
Yuanzhi Jiang   +10 more
doaj   +1 more source

Light-emitting diodes and photodiodes in the deep ultra-violet range for absorption photometry in liquid chromatography, capillary electrophoresis and gas sensing [PDF]

open access: yes, 2016
Absorbance measurement in the deep ultra-violet range (below 300 nm) has been one of the most widely used detection methods for analytical techniques as a large number of organic compounds have strong absorption bands in the deep UV region.
Bui, Duy Anh
core   +1 more source

Improved Charge Injection and Transport of Light-Emitting Diodes Based on Two-Dimensional Materials

open access: yesApplied Sciences, 2019
Light-emitting diodes (LEDs) are considered to be the most promising energy-saving technology for future lighting and display. Two-dimensional (2D) materials, a class of materials comprised of monolayer or few layers of atoms (or unit cells), have ...
Yuanming Zhou   +6 more
doaj   +1 more source

Recent Advances in Silver Nanowires Electrodes for Flexible Organic/Perovskite Light-Emitting Diodes

open access: yesFrontiers in Chemistry, 2022
Flexible organic light-emitting diodes and perovskite light-emitting diodes (PeLEDs) have been investigated as an innovative category of revolutionary LED devices for next-generation flat display and lighting applications.
Shuping Hou   +8 more
doaj   +1 more source

Improved resolution Fourier ptychography scheme using oil‐filled dome‐shaped LED array

open access: yesElectronics Letters, 2022
Utilising angular‐varied illumination in Fourier Ptychography, the resolution of optical microscopes can be increased and the phase of the sample can also be recovered while maintaining a wide field‐of‐view.
Mahdieh Gholami Mayani   +3 more
doaj   +1 more source

Get it white : color-tunable AC/DC OLEDs [PDF]

open access: yes, 2015
This work was funded by the European Social Fund and the Free State of Saxony through the OrthoPhoto project. We kindly acknowledge the support from NUDEV.Organic light-emitting diodes (OLEDs) have gained considerable attention because of their use of ...
Kliem, Mona   +5 more
core   +1 more source

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