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Volume 89 Issue 18 | p. 28 | Concentrates
Issue Date: April 28, 2011

Nanotubes Improve OLED Performance

Low-voltage transistors incorporating carbon nanotubes could make large OLED display screens a practical possibility
Department: Science & Technology
News Channels: Nano SCENE
Keywords: organic light-emitting diode, OLED, transistor, carbon nanotubes
University of Florida researchers explain how carbon nanotubes might make organic light-emitting diodes feasible for large display screens.
Credit: Science

An organic light-emitting diode (OLED) with a low-voltage transistor incorporating carbon nanotubes in place of the traditional power-hungry silicon-based transistor could make large OLED display screens a practical possibility, according to a report (Science, DOI: 10.1126/science.1203052). Although OLEDs offer color quality and contrast advantages over liquid crystal displays, transistor power-consumption limits OLED usefulness for applications such as TVs and computers. Currently, OLEDs can be found in small handheld devices such as cell phones. Andrew G. Rinzler and Mitchell A. McCarthy of the University of Florida and colleagues had previously shown that thin-film transistors consisting of a network of single-walled carbon nanotubes require relatively little power to drive the electronic action of OLEDs. The team has now prepared fully operational OLEDs incorporating the nanotube-based transistors. These devices produce bright red, blue, and green pixels comparable to those of traditional OLEDs, but at much lower voltages. The researchers note that the pixels can switch on and off rapidly enough to be useful in applications such as high-definition TVs.

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Nanotube-based transistors help light up a blue OLED.
Credit: Science
8918scon_prototype
 
Nanotube-based transistors help light up a blue OLED.
Credit: Science
 
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