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Hiroshima University and The Nippon Kayaku develop organic semiconductor material

A research team from Hiroshima University and The Nippon Kayaku company has developed a new kind of organic semiconductor material that allows for high electron mobility yet remains stable even when exposed to air.

It is versatile too. Being an organic material, it can be sprayed onto various substrates, including silicon, glass and plastic, or dissolved in a solvent and coated or printed.

Dubbed DNTT, the material is synthesized in a three-step process starting with 2-naphthaldehyde, a commercially available polymer. Its electron mobility is three times faster than amorphous silicon, making it one of the speediest organic semiconductor materials.

It is bio degradable, but does not go off if you leave it out the fridge. Whereas existing organic semiconductor materials readily degrade when exposed to air, requiring that devices be sealed to operate, DNTT retains its properties even after roughly 10 weeks of exposure.

The research team sees this material being used to make thin-film transistors for flat-panel displays. Another application is in films that can be used for power supplies, wireless smart tags, e-paper and scanners that can be rolled up.

Nippon Kayaku has licensed the technology from Hiroshima University and plans to supply samples of the new material to researchers and manufacturers.





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