Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International



Home > Press > Nanometer Graphene Makes Novel OLEDs Display

Abstract:
Researchers at Stanford University have successfully developed brand new concept of organic lighting-emitting diodes (OLEDs) with a few nanometer of graphene as transparent conductor. This paved the way for inexpensive mass production of OLEDs on large-area low-cost flexible plastic substrate, which could be rolled up like wallpaper and virtually applied to anywhere you want.

Nanometer Graphene Makes Novel OLEDs Display

Stanford, CA | Posted on March 10th, 2010

Due to its superb image quality, low power consumption and ultra-thin device structure, OLED has been developed for more than 20 years, and recently finds its application in ultra-thin televisions and other display screens such as those on digital cameras and mobile phones. OLEDs consist of active organic luminescent structure sandwiched between two electrodes, one of which must be transparent. Traditionally, indium tin oxide (ITO) is used in this type of devices. However, indium is rare, expensive and difficult to recycle. Scientists have been actively searching for an alternative candidate.

The next generation of optoelectronic devices requires transparent conductive electrodes to be lightweight, flexible, cheap, environmental attractive, and compatible with large-scale manufacturing methods. Graphene, single layer of graphite, is becoming a very promising candidate due to its unique electrical and optical properties in last two years. Very recently, Junbo Wu et al., researchers at Stanford University, successfully demonstrated the application of graphene in OLEDs for the first time.

Junbo Wu, leading researcher of the development, said that they achieved OLEDs on graphene with performance similar to a control device on conventional ITO transparent anodes, which is very exciting and promising for real-world application. ‘The current report by Wu et al. puts forward a strong case for graphene as a transparent conductor given its competitive performance, even with significantly high sheet resistance.' said Chongwu Zhou, professor at University of Southern California in the Perspective of ACS Nano, 4(1), 2010.

‘Graphene has the potential to be a transparent electrode with higher performance, which means, more transparent, while at the same time, being more conductive. It could also be orders of magnitude cheaper than conventional transparent conductor, like ITO. It really has the potential to be both better and cheaper.' said Prof. Peter Peumans in Podcast Episode 30, ACS Nano January 2010. ‘It (graphene) does have additional advantage that the electrode is very thin, only a couple of nanometer thick, which gives you potentially a lot more freedom how you design your devices.' Peter also added.

This research sheds light on the enormous potential of graphene, and opens up an entirely new avenue towards the development of efficient and economical transparent conductors for flexible optoelectronic devices, such as OLEDs and organic photovoltaic cells. Transferring of large-area graphene thin film to a foreign flexible substrate has been previously demonstrated. Combining these technologies together, we have good reason to expect graphene OLEDs product on flexible plastic in the near future.

The research is published in the journal ACS Nano, 4(1), 2010, entitled ‘Organic Light-Emitting Diodes on Solution-Processed Graphene Transparent Electrodes'. The authors are Junbo Wu, Mukul Agrawal, Hector A. Becerril, Zhenan Bao, Zunfeng Liu, Yongsheng Chen and Peter Peumans. For detailed information, please refer to pubs.acs.org/doi/abs/10.1021/nn900728d.

####

For more information, please click here

Contacts:
Junbo Wu
Phone: (650) 704-4362

Copyright © Stanford University

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Researchers develop artificial building blocks of life March 8th, 2024

How surface roughness influences the adhesion of soft materials: Research team discovers universal mechanism that leads to adhesion hysteresis in soft materials March 8th, 2024

Two-dimensional bimetallic selenium-containing metal-organic frameworks and their calcinated derivatives as electrocatalysts for overall water splitting March 8th, 2024

Curcumin nanoemulsion is tested for treatment of intestinal inflammation: A formulation developed by Brazilian researchers proved effective in tests involving mice March 8th, 2024

Display technology/LEDs/SS Lighting/OLEDs

Light guide plate based on perovskite nanocomposites November 3rd, 2023

Simple ballpoint pen can write custom LEDs August 11th, 2023

Novel design perovskite electrochemical cell for light-emission and light-detection May 12th, 2023

A universal HCl-assistant powder-to-powder strategy for preparing lead-free perovskites March 24th, 2023

Possible Futures

Two-dimensional bimetallic selenium-containing metal-organic frameworks and their calcinated derivatives as electrocatalysts for overall water splitting March 8th, 2024

Curcumin nanoemulsion is tested for treatment of intestinal inflammation: A formulation developed by Brazilian researchers proved effective in tests involving mice March 8th, 2024

The Access to Advanced Health Institute receives up to $12.7 million to develop novel nanoalum adjuvant formulation for better protection against tuberculosis and pandemic influenza March 8th, 2024

Nanoscale CL thermometry with lanthanide-doped heavy-metal oxide in TEM March 8th, 2024

Academic/Education

Rice University launches Rice Synthetic Biology Institute to improve lives January 12th, 2024

Multi-institution, $4.6 million NSF grant to fund nanotechnology training September 9th, 2022

National Space Society Helps Fund Expanding Frontier’s Brownsville Summer Entrepreneur Academy: National Space Society and Club for the Future to Support Youth Development Program in South Texas June 24th, 2022

How a physicist aims to reduce the noise in quantum computing: NAU assistant professor Ryan Behunin received an NSF CAREER grant to study how to reduce the noise produced in the process of quantum computing, which will make it better and more practical April 1st, 2022

Announcements

What heat can tell us about battery chemistry: using the Peltier effect to study lithium-ion cells March 8th, 2024

Curcumin nanoemulsion is tested for treatment of intestinal inflammation: A formulation developed by Brazilian researchers proved effective in tests involving mice March 8th, 2024

The Access to Advanced Health Institute receives up to $12.7 million to develop novel nanoalum adjuvant formulation for better protection against tuberculosis and pandemic influenza March 8th, 2024

Nanoscale CL thermometry with lanthanide-doped heavy-metal oxide in TEM March 8th, 2024

Solar/Photovoltaic

Development of zinc oxide nanopagoda array photoelectrode: photoelectrochemical water-splitting hydrogen production January 12th, 2024

Shedding light on unique conduction mechanisms in a new type of perovskite oxide November 17th, 2023

Inverted perovskite solar cell breaks 25% efficiency record: Researchers improve cell efficiency using a combination of molecules to address different November 17th, 2023

Charged “molecular beasts” the basis for new compounds: Researchers at Leipzig University use “aggressive” fragments of molecular ions for chemical synthesis November 3rd, 2023

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project