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Worm Memory ­ses Orders of Magnitude Less Power Than Other Devices

Cambridge University researchers have developed an inexpensive write once, read many (WORM) memory device that uses much less power than previous devices. The ultralow-power WORM device can be used in any organic electronic circuit in which the operation power is low.

WORM memory diagram  The device structure and energy level diagram of the WORMmemory, which can be programmed at power densities that are orders of magnitude lower than previously reportedultralow-power WORM devices.Credit: American Institute of Physics
The electron-only design is made possible by solution processing, which makes it less expensive than other techniques. "By using the wide bandgap ZnO nanoparticles, the electron-only device structure allows us to block the hole current," says Cambridge's Jianpu Wang.

The researchers say their device is designed for use in disposable radio-frequency identification tags, which need inexpensive memory devices that require very low current consumption.

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