Portuguese team makes first paper based transistor

Jul 22, 2008

(PhysOrg.com) -- Elvira Fortunato and colleagues from the Centro de Investigação de Materiais (Cenimat/I3N), at Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, made the first Field Effect Transistor (FET) with a paper "interstrate" layer.

A new device which rivals in electrical performance with the actual state of the art of oxide based thin film transistors (TFTs) produced on glass or crystalline silicon substrates. These results will be published next September in IEEE Electron Device Letters.

Nowadays, there is an increased interest in the use of biopolymers for low-cost electronic applications. Since cellulose is the Earth’s major biopolymer, some international teams have reported using paper as the physical support (substrate) of electronic devices. But, until now, no one had used paper as an interstrate component of a FET.

In a new approach, scientists from Cenimat/I3N – a research group coordinated by Elvira Fortunato and Rodrigo Martins – used a common sheet of paper as the dielectric layer on oxide FETs.

The research team fabricated the devices on both sides of the paper sheet. This way, the paper acts simultaneously as the electric insulator and as the substrate. "Is a two in one," says Elvira Fortunato.

Furthermore, electric characterization of devices showed that the hybrid FETs’ performance outpace those of amorphous silicon TFTs, and rival with the actual state of the art of oxide thin film transistors.

These results suggest promising new disposable electronics devices, like paper displays, smart labels, smart packaging, bio-applications, RFID tags, among others.

Citation: High Performance Flexible Hybrid Field Effect Transistors based on Cellulose Fiber-Paper will be published next September in IEEE Electron Device Letters.

Provided by Universidade Nova de Lisboa

Explore further: Collision course: ONR testing high-speed planing hulls to better understand wave slam

Related Stories

Researchers develop new way to manufacture nanofibers

May 13, 2015

Researchers at the University of Georgia have developed an inexpensive way to manufacture extraordinarily thin polymer strings commonly known as nanofibers. These polymers can be made from natural materials ...

Nano-policing pollution

May 13, 2015

Pollutants emitted by factories and car exhausts affect humans who breathe in these harmful gases and also aggravate climate change up in the atmosphere. Being able to detect such emissions is a critically ...

Controlling the internal structure of mitochondria

May 05, 2015

(Phys.org)—One might think of mitochondria as devices for transporting electrons to their lowest energy state. Little bags of finely-tuned respiratory chain subunits which combine electrons extracted from ...

Bendable glass devices

Apr 27, 2015

A special class of glass materials known as chalcogenide glasses holds promise for speeding integration of photonic and electronic devices with functions as diverse as data transfer and chemical sensing. ...

Recommended for you

Managing the “Internet of Things

12 hours ago

Researchers in Hong Kong have developed a software platform designed to manage and control devices for "Internet of Things" (IoT) systems. The platform can be tailored for everything from city management ...

Off-road run-ins for driverless fleets

May 28, 2015

Carlos Holguin from the University of Rome, project coordinator with the CITYMOBIL2 project, talks about how the project is demonstrating automated road passenger transport through large and small-scale off-normal traffic ex ...

User comments : 4

Adjust slider to filter visible comments by rank

Display comments: newest first

patnclaire
3.3 / 5 (4) Jul 22, 2008
I seem to recall the editor of Analog magazine, the late Joseph Campbell, publishing articles about this sort of thing back in the 1960s. He and the author were speculating about being able to draw circuts with pencil on paper and have a working circut.
What took so long?
Wasabi
2.5 / 5 (4) Jul 22, 2008
I'd be curious to know how they handle the heat issue with something as heat sensitive as a paper based material.
Soylent
4 / 5 (3) Jul 22, 2008
I'd be curious to know how they handle the heat issue with something as heat sensitive as a paper based material.


They don't, there is no heat issue.
Arikin
not rated yet Jul 22, 2008
I would also assume that recycling would be easier. Metals and paper are valuable and recycling techniques for them are efficient.

If the vending machine of these disposable items had a recycle slot it would make collection easy. Buy a disposable phone, use it, drop it at the next phone vending machine.

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.