White LEDs directly on paper

Jul 10, 2012

Imagine a white luminous curtain waving in the breeze. Or wallpaper that lights up your room with perfect white light. The applications are not very far away. White LEDs, made from zinc oxide and a conducting polymer, can be manufactured directly on paper, as shown by Gul Amin in his doctoral thesis at Linkoping University, Sweden.

In his thesis, Gul Amin, who recently received his doctorate at the Physical Electronics and Nanotechnology group, Campus Norrköping, shows how it is possible to grow white LEDs directly on paper and also to print them on for example - this method has a patent pending.

The active components are nanorods of on a thin layer of polydiethylflourene (PFO), a . But the paper has first been coated with a thin, water-repellent, protective and levelling layer of cyclotene, a resin.

"This is the first time anyone has been able to build electronic and photonic inorganic semiconducting components directly on paper using chemical methods," says professor Magnus Willander, who is leading the research.

The article has been published in Wiley's Phys. Status Solidi - Rapid Research Letters.

In one of the thesis' other articles, published in Springer's Journal of Material Science, Gul Amin also shows how it is possible to grow nanorods on paper, blow them off the surface using ultrasound and collect them in the form of a powder. This powder can then be used to print the nanorods of zinc oxide, and thus LEDs, on paper or plastic in a normal printing press. That method also has patents pending.

Explore further: UO-industry collaboration points to improved nanomaterials

More information: The thesis: ZnO and CuO Nanostructures: Low Temperature Growth, Characterization, their Optoelectronic and Sensing Applications, Gul Amin, Department of Science and Technology, Linköping University, Campus Norrköping, 2012. liu.diva-portal.org/smash/reco… d=1&pid=diva2:515790

add to favorites email to friend print save as pdf

Related Stories

Exposing ZnO nanorods to visible light removes microbes

May 12, 2011

The practical use of visible light and zinc oxide nanorods for destroying bacterial water contamination has been successfully demonstrated by researchers at the Asian Institute of Technology (AIT). Nanorods grown on glass ...

How to see through opaque materials

Mar 08, 2010

New experiments show that it's possible to focus light through opaque materials and detect objects hidden behind them, provided you know enough about the material.

Recommended for you

Paper electronics could make health care more accessible

Nov 19, 2014

Flexible electronic sensors based on paper—an inexpensive material—have the potential to some day cut the price of a wide range of medical tools, from helpful robots to diagnostic tests. Scientists have ...

User comments : 3

Adjust slider to filter visible comments by rank

Display comments: newest first

SoylentGrin
not rated yet Jul 10, 2012
Alright, how about teaming it up with the ability to alter paper (http://phys.org/n...c.html), and print color LED's too. Then you could make the walls essentially giant displays. Forget lamps, posters, wallhangings.
Oo! Pair up wall-size computer displays with the Leap Motion device coming out in December, and have fully interactive rooms.
SoylentGrin
not rated yet Jul 10, 2012
Oo! As you hang your virtual pictures of friends and family, they could be linked up to live webcams (if the subject consented). That picture of mom that's moving in a Potter-esque way? Actually an interactive link with mom. Privacy mode would be easier to activate than hanging a curtain over the picture, though.
rubberman
5 / 5 (2) Jul 10, 2012
And all of it using less power than a toaster oven!

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.