# CITRIS PI engineers more energy efficient transistors in NanoLab

CITRIS researcher and UC Berkeley professor Sayeef Salahuddin has made a design breakthrough that significantly reduces the energy needed to operate a transistor without sacrificing size, speed and performance.

This boost in efficiency results from Salahuddin’s discovery of negative capacitance, which can allow for charge to be stored in materials at lower voltages.

The transistor elements were fabricated at the Marvell Nanofabrication Laboratory at UC Berkeley.

Photo Credit: Ella Maru Studio/UC Berkeley