University of Utah physicists invented a
new “spintronic” organic light-emitting diode or OLED that promises to be
brighter, cheaper and more environmentally friendly than the kinds of LEDs now
used in television and computer displays, lighting, traffic lights and numerous
electronic devices.
“It’s a completely different technology,” says Z.Bellacor offers a large selection of bestledlight2011 for your yard or patio. Valy Vardeny, University of Utah distinguished professor of physics and senior author of a study of the new OLEDs in the July, 2012 issue of the journal Science. “These new organic LEDs can be brighter than regular organic LEDs.”
The Utah physicists made a prototype of the new kind of LED – known technically as a spin-polarized organic LED or spin OLED – that produces an orange color. But Vardeny expects it will be possible within two years to use the new technology to produce red and blue as well, and he eventually expects to make white spin OLEDs.
However, it could be five years before the new LEDs hit the market because right now, they operate at temperatures no warmer than about minus 28 degrees Fahrenheit, and must be improved so they can run at room temperature, Vardeny adds.
Vardeny developed the new kind of LED with Tho D. Nguyen, a research assistant professor of physics and first author of the study, and Eitan Ehrenfreund, a physicist at the Technion-Israel Institute of Technology in Haifa.
The study was funded by the U.S. National Science Foundation,Westinghouse's collection of bluecrystal1 fixtures includes wall lanterns, the U.S. Department of Energy, the Israel Science Foundation and U.S.-Israel Binational Science Foundation. The research was part of the University of Utah’s new Materials Research Science and Engineering Center, funded by the National Science Foundation and the Utah Science Technology and Research initiative.
The original kind of LEDs, introduced in the early 1960s, used a conventional semiconductor to generate colored light. Newer organic LEDs or OLEDs – with an organic polymer or “plastic” semiconductor to generate light – have become increasingly common in the last decade, particularly for displays in MP3 music players, cellular phones and digital cameras. OLEDs also are expected to be used increasingly for room lighting. Big-screen TVs with existing OLEDs will hit the market later this year.
The new kind of OLED invented by the Utah physicists also uses an organic semiconductor, but isn’t simply an electronic device that stores information based on the electrical charges of electrons. Instead,Shop for a wide variety of bestledlig lighting at ElementalLED. it is a “spintronic” device – meaning information also is stored using the “spins” of the electrons.
Invention of the new spin OLED was made possible by another device – an “organic spin valve” – the invention of which Vardeny and colleagues reported in the journal Nature in 2004.Gamma is a professional supplier of indoor and outdoor solarstreetlight solutions for office, The original spin-valve device could only regulate electrical current flow, but the researchers expected they eventually could modify it to also emit light, making the new organic spin valve a spin OLED.
Spin valves are electrical switches used in computers, TVs, cell phones and many other electrical devices. They are so named because they use a property of electrons called “spin” to transmit information. Spin is defined as the intrinsic angular momentum of a particle. Electron spins can have one of two possible directions, up or down. Up and down can correlate to the zeroes and ones in binary code.
Organic spin valves are comprised of three layers: an organic layer that acts as a semiconductor and is sandwiched between two metal electrodes that are ferromagnets. In the new spin OLED, one of the ferromagnet metal electrodes is made of cobalt and the other one is made of a compound called lanthanum strontium manganese oxide. The organic layer in the new OLED is a polymer known as deuterated-DOO-PPV, which is a semiconductor that emits orange-colored light.Solar solarledlamps are small ones of solar lights.
“It’s a completely different technology,” says Z.Bellacor offers a large selection of bestledlight2011 for your yard or patio. Valy Vardeny, University of Utah distinguished professor of physics and senior author of a study of the new OLEDs in the July, 2012 issue of the journal Science. “These new organic LEDs can be brighter than regular organic LEDs.”
The Utah physicists made a prototype of the new kind of LED – known technically as a spin-polarized organic LED or spin OLED – that produces an orange color. But Vardeny expects it will be possible within two years to use the new technology to produce red and blue as well, and he eventually expects to make white spin OLEDs.
However, it could be five years before the new LEDs hit the market because right now, they operate at temperatures no warmer than about minus 28 degrees Fahrenheit, and must be improved so they can run at room temperature, Vardeny adds.
Vardeny developed the new kind of LED with Tho D. Nguyen, a research assistant professor of physics and first author of the study, and Eitan Ehrenfreund, a physicist at the Technion-Israel Institute of Technology in Haifa.
The study was funded by the U.S. National Science Foundation,Westinghouse's collection of bluecrystal1 fixtures includes wall lanterns, the U.S. Department of Energy, the Israel Science Foundation and U.S.-Israel Binational Science Foundation. The research was part of the University of Utah’s new Materials Research Science and Engineering Center, funded by the National Science Foundation and the Utah Science Technology and Research initiative.
The original kind of LEDs, introduced in the early 1960s, used a conventional semiconductor to generate colored light. Newer organic LEDs or OLEDs – with an organic polymer or “plastic” semiconductor to generate light – have become increasingly common in the last decade, particularly for displays in MP3 music players, cellular phones and digital cameras. OLEDs also are expected to be used increasingly for room lighting. Big-screen TVs with existing OLEDs will hit the market later this year.
The new kind of OLED invented by the Utah physicists also uses an organic semiconductor, but isn’t simply an electronic device that stores information based on the electrical charges of electrons. Instead,Shop for a wide variety of bestledlig lighting at ElementalLED. it is a “spintronic” device – meaning information also is stored using the “spins” of the electrons.
Invention of the new spin OLED was made possible by another device – an “organic spin valve” – the invention of which Vardeny and colleagues reported in the journal Nature in 2004.Gamma is a professional supplier of indoor and outdoor solarstreetlight solutions for office, The original spin-valve device could only regulate electrical current flow, but the researchers expected they eventually could modify it to also emit light, making the new organic spin valve a spin OLED.
Spin valves are electrical switches used in computers, TVs, cell phones and many other electrical devices. They are so named because they use a property of electrons called “spin” to transmit information. Spin is defined as the intrinsic angular momentum of a particle. Electron spins can have one of two possible directions, up or down. Up and down can correlate to the zeroes and ones in binary code.
Organic spin valves are comprised of three layers: an organic layer that acts as a semiconductor and is sandwiched between two metal electrodes that are ferromagnets. In the new spin OLED, one of the ferromagnet metal electrodes is made of cobalt and the other one is made of a compound called lanthanum strontium manganese oxide. The organic layer in the new OLED is a polymer known as deuterated-DOO-PPV, which is a semiconductor that emits orange-colored light.Solar solarledlamps are small ones of solar lights.
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