MIT makes quantum leap in display technology

Summary:New displays with bright, pure colours and tiny power demands could be on the way, thanks to research at the Massachusetts Institute of Technology

Supremely efficient ultra-thin notebook and video displays may be the result of new quantum discoveries announced by MIT. The new technology, which combines organic and traditional solid-state light emitting features, has the potential to produce much purer colours and use much less electricity than existing LEDs. "One of the goals is to demonstrate a display that is stable, simple to produce, flat, high-resolution and that uses minimal power," researcher Vladimir Bulovic said.

The displays are based around quantum dots -- microscopic holes in a crystalline structure that are designed to hold a handful of electrons. By moving electrons into and out of these dots light is produced, and by changing the size and spacing of the dots, a wide variety of colours can be produced. Other forms of lighting depend on the natural configuration of compounds, and thus have a much more limited range of colours. Practically speaking, a layer of quantum dots is sandwiched between two layers of other compounds, one electron-rich and one electron-poor. The researchers use plastic semiconductors for these outer layers -- very fashionable new materials that many expect will eventually replace LCDs.

MIT says that the major advance with this technology, called Quantum Dot Organic LED, or QD-OLED, is that the filling in the sandwich is just one quantum dot thick. This has the potential to allow 100 percent of the electrons moved into the holes to produce light, compared to a maximum efficiency in other systems of around 30 percent and an actual efficiency that can struggle to beat 5 percent. Previous QD-OLEDs had layers of 10 to 20 quantum dots; the single-dot layer is just three nanometres across.

In addition to being used for extraordinarily thin, bright flat-panel displays, MIT said, the QD-OLEDs may be used to create very stable light for scientific experiments and to miniaturise scientific equipment.


See Chips Central for the latest headlines on processors and semiconductors.

To find out more about the computers and hardware that these chips are being used in, see ZDNet UK's Hardware News Section.

Let the Chips Central editor know what you think by email. And sign up for the weekly Chips Central newsletter.

Topics: Processors

About

Editor, ZDNet UK. Ex technology/technical editor of ZDNet UK, IT Week, PC Magazine, Computer Life, Mac User, Alfa Systems, Amstrad, Sinclair. Micronet 800, Marconi Space and Defence Systems, and a dodgy TV repair shop in the back streets of Plymouth. Can still swap out a gassy PL509 with the best of 'em.Dear Reader - contact me via our m... Full Bio

Kick off your day with ZDNet's daily email newsletter. It's the freshest tech news and opinion, served hot. Get it.

Related Stories

The best of ZDNet, delivered

You have been successfully signed up. To sign up for more newsletters or to manage your account, visit the Newsletter Subscription Center.
Subscription failed.