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[SD] New Transistor for Plastic Electronics Exhibits the Best of Both Worlds

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Quote:
In the quest to develop flexible plastic electronics, one of the stumbling blocks has been creating transistors with enough stability for them to function in a variety of environments while still maintaining the current needed to power the devices. Online in the journal Advanced Materials, researchers from the Georgia Institute of Technology describe a new method of combining top-gate organic field-effect transistors with a bilayer gate insulator. This allows the transistor to perform with incredible stability while exhibiting good current performance. In addition, the transistor can be mass produced in a regular atmosphere and can be created using lower temperatures, making it compatible with the plastic devices it will power.
Quote:
"When we started to do the test experiments, the results were stunning. We were expecting good stability, but not to the point of having no degradation in mobility for more than a year," said Kippelen.

The team performed a battery of tests to see just how stable the bilayer was. They cycled the transistors 20,000 times. There was no degradation. They tested it under a continuous biostress where they ran the highest possible current through it. There was no degradation. They even stuck it in a plasma chamber for five minutes. There was still no degradation.

The only time they saw any degradation was when they dropped it into acetone for an hour. There was some degradation, but the transistor was still operational.
Quote:
"By having the bilayer gate insulator we have two different degradation mechanisms that happen at the same time, but the effects are such that they compenstate for one another," explains Kippelen. "So if you use one it leads to a decrease of the current, if you use the other it leads to a shift of the thereshold voltage and over time to an increase of the current. But if you combine them, their effects cancel out."

"This is an elegant way of solving the problem. So, rather than trying to remove an effect, we took two processes that compliment one another and as a result you have a result that's rock stable."
Quote:
Applications for these transistors include smart bandages, RFID tags, plastic solar cells, light emitters for smart cards -- virtually any application where stable power and a flexible surface are needed.
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post #2 of 3
more cheap plastic, yay
post #3 of 3
Thread Starter 
Well, what if it's bioplastic: made from corn, and biodegradable?
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