...read the wave

nanotechnologie,nanoteknologi,nanotecnologia,
nanotehnoloogia, nanoteknologia, nanotechnologija, nanotehnologijas, nanoteknologija, nanotechnologii, nanotecnologia, nanotehnologijo, nanoteknik
2006
Nano Elekronik
...Nano Electronics
...Nano Elektronica
www.nanotsunami.com

 

High Performance OLED on Carbon Nanotube Electrodes


Researchers at the Regroupement Québecois sur les Matériaux de Pointe (RQMP) in Québec, Canada have assembled an organic light emitting diode (OLED) that uses thin and conductive single wall carbon nanotube sheets as the transparent electrode. The performance of their electrode rivals that of the transparent conducting oxide - indium tin oxide - currently used in commercial applications. The demonstration of this new technology recently appeared in the May online issue of Applied Physics Letters .

Schematic of the OLED device fabricated on a carbon nanotube electrode (above) and image of the device revealing the carbon nanotube fibers that compose the fabric-like sheet electrode (below).

Copyright © Université de Montréal

 

Organic light emitting diodes have in recent years emerged as a promising low cost technology for making large area flat panel displays and flexible light emitting fabrics. However, the fabrication of flexible OLEDs has up to now been held back by the fragility of the brittle indium tin oxide layer that serves as the transparent electrode. Constant bending of this layer unavoidably leads to cracking and device failure. By using carbon nanotubes, a highly conductive and flexible tube shaped carbon nanostructure, thin sheets a few tens of nanometers in thickness can be fabricated following a procedure akin to making paper. These sheets preserve the conductivity and flexibility of the carbon nanotubes and are thin enough to be highly transparent.

By following the fabrication procedure they developed, the researchers succeeded in producing a high-performance OLED on this new electrode material. In their work they also outline the parameters that can be further optimized in order improve the performance of their design. "In addition to their flexibility, carbon nanotube sheets exhibit a number of properties that make them an attractive alternative to transparent conducting oxides for display and lighting applications," says Carla Aguirre, the leading author of the paper. "By applying the appropriate chemical treatment they can in principle be also made to replace the metal electrode in order to make OLEDs that emit light from both sides."

To learn more, refer to the scientific article: "Carbon nanotube sheets as electrodes in organic light-emitting diodes" Appl. Phys. Lett. 88 183104 (2006) or visit this link .

Contact:
Richard Martel
r.martel@umontreal.ca

Copyright © Nanoscale Science and Technology Portal for Univesité de Montréal and École Polytechnique

www.nano-tsunami.com
This story has been adapted from a news release -
Diese Meldung basiert auf einer Pressemitteilung -
Deze tekst is gebaseerd op een nieuwsbericht -





who is reading
the wave ?

missed some news ?
click on archive photo

 

or how about joining us

 

or contacting us ?

 


about us

 

our mission