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65 Current news about the topic leds

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Four elements make 2-D optical platform

27-Sep-2017

Rice University scientists have discovered a two-dimensional alloy with an optical bandgap that can be tuned by the temperature used to grow it. The Rice lab of materials scientist Pulickel Ajayan grew the four-component alloy of transition metals molybdenum and tungsten with chalcogens sulfur ...

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A spectroscopic 'science camera' system for smartphones

15-Sep-2017

The latest versions of most smartphones contain at least two and sometimes three built-in cameras. Researchers at the University of Illinois would like to sell mobile device manufactures on the idea of adding yet another image sensor as a built-in capability for health diagnostic, environmental ...

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Stretchable biofuel cells extract energy from sweat to power wearable devices

25-Aug-2017

A team of engineers has developed stretchable fuel cells that extract energy from sweat and are capable of powering electronics, such as LEDs and Bluetooth radios. The biofuel cells generate 10 times more power per surface area than any existing wearable biofuel cells. The devices could be used ...

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Bright thinking leads to breakthrough in nuclear threat detection science

03-Jul-2017

Taking inspiration from an unusual source, a Sandia National Laboratories team has dramatically improved the science of scintillators -- objects that detect nuclear threats. According to the team, using organic glass scintillators could soon make it even harder to smuggle nuclear materials ...

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Development of low-dimensional nanomaterials could revolutionize future technologies

19-Jun-2017

Javier Vela, scientist at the U.S. Department of Energy's Ames Laboratory, believes improvements in computer processors, TV displays and solar cells will come from scientific advancements in the synthesis of low-dimensional nanomaterials. Ames Laboratory scientists are known for their expertise ...

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Low-cost material for lighting and diagnostics produces white light imitating sunlight

08-Jun-2017

Researchers at the University of Turku, Finland, have developed a synthetic material based on the natural hackmanite mineral which produces broad spectrum white light in lamps. The hackmanite created by the Inorganic Materials Chemistry research group is a low-cost material emitting luminescence ...

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Gold coating to control luminescence of nanowires

17-Mar-2017

Physicists at the University of Cincinnati are working to harness the power of nanowires, microscopic wires that have the potential to improve solar cells or revolutionize fiber optics. Nanotechnology has the potential to solve the bottleneck that occurs in storing or retrieving digital data - or ...

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Perovskite edges can be tuned for optoelectronic performance

14-Mar-2017

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating innovative 2D layered hybrid perovskites that allow greater freedom in designing and fabricating efficient optoelectronic devices. ...

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Surprising spin behavior at room temperature

09-Feb-2017

The field of spintronics focuses on spin transport behavior in magnetic metals, and the major findings in this area have important implications for the field of electronics. This is because conventional electronics primarily considers the electron charge, whereas spintronics allows the electron ...

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1,000 times more efficient nano-LED opens door to faster microchips

06-Feb-2017

The electronic data connections within and between microchips are increasingly becoming a bottleneck in the exponential growth of data traffic worldwide. Optical connections are the obvious successors but optical data transmission requires an adequate nanoscale light source, and this has been ...

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