Processing Method Makes Graphene Highly Conductive

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To construct solar cells and touch screens, manufacturers need sheets of optically transparent and electrically conductive material that can act as electrodes while still allowing as much light as possible into or out of the device. These sheets are currently made out of indium tin oxide (ITO), which is a good conductor but it has several drawbacks including brittleness, chemical instability, and poor transmittance in near infrared. Indium itself is an expensive element that has recently experienced fluctuating prices due to problems with its supply. These drawbacks both increase the price and limit the applications of this material.

Researchers at Purdue University have developed a new method of processing graphene that produces highly conductive, transparent sheets that are better suited for electronics than ITO. In addition to being made out of inexpensive graphene, this new material is flexible, chemically stable, light, and has good transmittance in near infrared, which will improve efficiency in solar cells.

Advantages:
-Uses graphene, which is less expensive
-Graphene is flexible, chemically stable, light, and has good transmittance

Potential Applications:
-Solar cells
-Touch screens
-Displays
-Organics LEDs
Feb 7, 2012
Utility Patent
United States
9,524,806
Dec 20, 2016
Purdue Office of Technology Commercialization
1801 Newman Road
West Lafayette, IN 47906

Phone: (765) 588-3475
Fax: (765) 463-3486
Email: otcip@prf.org