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41 Current news about the topic leds

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KAIST made great improvements of nanogenerator power efficiency

19-05-2014

Nanogenerators are self-powered energy harvesters that convert kinetic energy created from vibrational and mechanical sources into electrical power, removing the need of external circuits or batteries for electronic devices. This innovation is vital in realizing sustainable energy generation in ...

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To bridge LEDs' green gap, scientists think small... really small

Nanostructures half a DNA strand-wide show promise for efficient LEDs

08-04-2014

Nanostructures half the breadth of a DNA strand could improve the efficiency of light emitting diodes (LEDs), especially in the "green gap," a portion of the spectrum where LED efficiency plunges, simulations at the U.S. Department of Energy's National Energy Research Scientific Computing Center ...

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Quantum physics with superconductivity in LEDs

Novel approach paves way for new quantum devices

20-03-2014

A team of University of Toronto physicists led by Alex Hayat has proposed a novel and efficient way to leverage the strange quantum physics phenomenon known as entanglement. The approach would involve combining light-emitting diodes (LEDs) with a superconductor to generate entangled photons and ...

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Two-dimensional material shows promise for optoelectronics

Team creates LEDs, photovoltaic cells, and light detectors using novel 1-molecule-thick material

12-03-2014

A team of MIT researchers has used a novel material that's just a few atoms thick to create devices that can harness or emit light. This proof-of-concept could lead to ultrathin, lightweight, and flexible photovoltaic cells, light emitting diodes (LEDs), and other optoelectronic devices, they ...

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Thinnest-possible LEDs to be stronger, more energy efficient

12-03-2014

Most modern electronics, from flat-screen TVs and smartphones to wearable technologies and computer monitors, use tiny light-emitting diodes, or LEDs. These LEDs are based off of semiconductors that emit light with the movement of electrons. As devices get smaller and faster, there is more demand ...

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Laser diodes versus LEDs

13-11-2013

Solid-state lighting (SSL) has recently become competitive with conventional light sources and is now the most efficient source of high color quality white light ever created. At the heart of SSL is the light-emitting diode (LED). The current standard architecture for SSL is the ...

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Breakthrough for solar cell efficiency

New atomic layer-by-layer InGaN technology offers perfect crystal

29-10-2013

Did you know that crystals form the basis for the penetrating icy blue glare of car headlights and could be fundamental to the future in solar energy technology? Crystals are at the heart of diodes. Not the kind you might find in quartz, formed naturally, but manufactured to form alloys, such as ...

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Two in one solution for low cost polymer LEDs and solar cells

23-07-2013

Considerable improvement in device performance of polymer-based optoelectronic devices is reported by researchers from Ulsan National Institute of Science and Technology (UNIST), South Korea. The new plasmonic material, can be applied to both polymer light-emitting diodes (PLEDs) and polymer ...

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Copper, gold and tin for efficient chips

13-12-2012

They are particularly small, durable and economical: LEDs have conquered the automotive industry; it is already possible today to recognize the make of a car by the design of the LED headlights. Whether in the interior, displays, infotainment system or brake lights, parking lights or fog lights – ...

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A Bright Future for Silicon

Ordered nanocrystal arrays may provide a new platform to study and tailor the light-emitting properties of silicon

23-11-2012

US scientists at the University of Texas at Austin and Cornell University have fabricated the first ordered arrays of silicon nanocrystals reported to date. Brian A. Korgel and colleagues developed a new chemical method to generate tiny silicon crystals—or quantum dots—with precisely controlled ...

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