All printed and transparent CNT TFT
First Claim
1. A method of fabricating a transparent thin film transistor, comprising:
- printing a concentrated aqueous metallic carbon nanotube solution on a substrate to form separated metallic carbon nanotube source and drain electrode layers on the substrate, the metallic carbon nanotube source and drain electrode layers defining a channel space there between;
cleaning the metallic carbon nanotube source and drain electrode layers by soaking in a mild acid to form cleaned metallic carbon nanotube source and drain electrode layers;
curing the cleaned metallic carbon nanotube source and drain electrode layers by heating to form cured metallic carbon nanotube source and drain electrode layers; and
thenprinting an aqueous semiconducting carbon nanotube solution in the channel space on the substrate to form a carbon nanotube channel semiconductor layer;
cleaning the carbon nanotube channel semiconductor layer by soaking in another mild acid to form a cleaned carbon nanotube channel semiconductor layer;
printing an ionic gel dielectric on the cleaned carbon nanotube channel semiconductor layer at room temperature to form an ionic gel dielectric layer thereon; and
thencuring the ionic gel dielectric layer by heating.
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Abstract
A transparent thin film transistor is fabricated on a substrate by first depositing a concentrated aqueous metallic carbon nanotube solution using an inkjet printer on the substrate to form source and drain electrodes with a channel therebetween. The deposited metallic carbon nanotubes are then cleaned in mild acid; and the source and drain electrodes are cured by heating. An aqueous semiconducting carbon nanotube solution is then deposited in the channel on the substrate using an inkjet printer on the substrate to form a channel semiconductor. The channel semiconductor is then cleaned using a mild acid. A dielectric gate of ionic gel dielectric is then deposited on the cleaned channel semiconductor using an inkjet printer; and the ionic gel dielectric is cured by heating.
10 Citations
7 Claims
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1. A method of fabricating a transparent thin film transistor, comprising:
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printing a concentrated aqueous metallic carbon nanotube solution on a substrate to form separated metallic carbon nanotube source and drain electrode layers on the substrate, the metallic carbon nanotube source and drain electrode layers defining a channel space there between; cleaning the metallic carbon nanotube source and drain electrode layers by soaking in a mild acid to form cleaned metallic carbon nanotube source and drain electrode layers; curing the cleaned metallic carbon nanotube source and drain electrode layers by heating to form cured metallic carbon nanotube source and drain electrode layers; and
thenprinting an aqueous semiconducting carbon nanotube solution in the channel space on the substrate to form a carbon nanotube channel semiconductor layer; cleaning the carbon nanotube channel semiconductor layer by soaking in another mild acid to form a cleaned carbon nanotube channel semiconductor layer; printing an ionic gel dielectric on the cleaned carbon nanotube channel semiconductor layer at room temperature to form an ionic gel dielectric layer thereon; and
thencuring the ionic gel dielectric layer by heating. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification