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Triple-Mode Transistors Show Potential

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Rice University researchers are using graphene to develop circuit applications that could be more compact and versatile than what is currently possible with silicon-based technologies. The researchers say that graphene-based, triple-mode single-transistor amplifiers could become key components in future electronic circuits.

A three-terminal single-transistor amplifier made of graphene can be changed during operation to any of three modes at any time using carriers that are positive, negative or both, providing opportunities that are not possible with traditional single-transistor architectures, says Rice professor Kartik Mohanram. A graphene transistor can be negative or positive based on whether the carrier originates from the source or drain terminals.

"Our work, and that of others, that focuses on the applications of ambipolarity complements efforts to make a better transistor with graphene," Mohanram says.

From Rice University
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