Nov
4
Imperfect Polymer LEDs Are More Efficient
November 4, 2020 | Leave a Comment
Physicists in China, led by Yadong Wang at Hebei North University, found that higher-than-expected efficiency can be reached through interactions between triplet excitons, and impurities embedded in the LED polymer. Molecular dynamics simulations have shown that the mysteriously high efficiency of polymer LEDs arises from interactions between triplet excitons in their polymer chains, and unpaired […]
Sep
2
Tiny LED Is Way More Efficient and Can Be A Laser Too
September 2, 2020 | Leave a Comment
Open Image…Save ImageOpen Image (using #TmpD/ia)… The National Institute of Standards and Technology (NIST) has a new design for light-emitting diodes that achieves a dramatic increase in brightness as well as the ability to create laser light. These characteristics could make it valuable in a range of applications. The device shows an increase in brightness of 100 to 1,000 times […]
May
20
Los Alamos National Laboratory researchers have developed new quantum dot solar cells that match the efficiency of existing quantum-dot based devices, but without lead or other toxic elements relied on by most solar cells of this type. Victor Klimov, a physicist specializing in semiconductor nanocrystals at Los Alamos and lead author of the report featured […]
May
13
Paul Scherrer Institute researchers have gained insights into a promising material for organic light-emitting diodes (OLEDs). The substance enables high light yields and would be inexpensive to produce on a large scale, which means such diodes are practically made for use in large-area room lighting. Researchers have been searching for such materials for a long […]
Apr
23
Another Step Closer to the Perovskite LED
April 23, 2020 | Leave a Comment
Linköping University researchers have developed a perovskite light-emitting diode (LED) with both high efficiency and long operational stability. Working with colleagues in Great Britain, China and the Czech Republic developing the perovskite light-emitting diode (LED) the team’s results have been published in Nature Communications. Professor Feng Gao, and head of research at the Division of […]
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