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Scientists Uncover Process that Stands in the Way of Making Quantum Dots Brighter

Scientists Uncover Process that Stands in the Way of Making Quantum Dots Brighter
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Stanford University , United States , Dipti Jasrasaria , Burak Guzelturk , Jennifer Dionne , John Philbin , Aaron Lindenberg , Ben Cotts , University Of California , Energy Frontier Research Center , Nature Communications , Department Of Energy , Stanford Institute For Materials , Lawrence Berkeley National Laboratory , Energy Sciences , Office Of Science , Argonne National Laboratory , National Accelerator Laboratory , Accelerator Laboratory , Stanford Institute , Berkeley National Laboratory , Eran Rabani , Frontier Research Center , Thermodynamic Limits , Coherent Light Source , Nanoscale Materials ,

Scientists uncover a process that stands in the way of making quantum dots brighter

Scientists uncover a process that stands in the way of making quantum dots brighter
Bright semiconductor nanocrystals known as quantum dots give QLED TV screens their vibrant colors. But attempts to increase the intensity of that light generate heat instead, reducing the dots’ light-producing efficiency.
A new study explains why, and the results have broad implications for developing future quantum and photonics technologies where light replaces electrons in computers and fluids in refrigerators, for example.
In a QLED TV screen, dots absorb blue light and turn it into green or red. At the low energies where TV screens operate, this conversion of light from one color to another is virtually 100% efficient. But at the higher excitation energies required for brighter screens and other technologies, the efficiency drops off sharply. Researchers had theories about why this happens, but no one had ever observed it at the atomic scale until now. ....

Stanford University , United States , Dipti Jasrasaria , Burak Guzelturk , Jennifer Dionne , John Philbin , Aaron Lindenberg , Ben Cotts , University Of California , Energy Frontier Research Center , Nature Communications , Stanford Institute For Materials , Lawrence Berkeley National Laboratory , Energy Sciences , Office Of Science , Argonne National Laboratory , Office Of Communications , Stanford Institute , Berkeley National Laboratory , Eran Rabani , Frontier Research Center , Thermodynamic Limits , Coherent Light Source , Nanoscale Materials , Stanford Nano Shared , ஸ்டான்போர்ட் பல்கலைக்கழகம் ,

WRC News 4 At 5 February 18, 2010

to perfect, setting up a three-part thursday night showdown for gold that could be one for the ages. and also in cypress mountain, the women drop into the halfpipe, including three americans riding to sweep the podium. 2002 gold medalist kelly clark, and hannah teter and 2006 gold medalist, gretchen bleiler. and then on late night gold medal speed skating. a strong event for canada s skating stars, go to nbcolympics.com for more. as nbc s coverage of the 2010 olympic winter games continues. and a great view of the slopes here at cypress mountain today it s all about the women s qualification for halfpipe. and i want to tell everyone we re going to stay past our allotted time, so we could follow it all way through qualifiers. we know people are anxious to see how many americans going to make it directly to the finals. and the finals will be live tonight, nbc primetime. we jump right in, to sophia sildar of slovenia. the backside 540. now the riders as the temperatures ....

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