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04 Jan 2019 | 07:17

Plessey Semiconductors and Nanoco Technologies reveal partnership

Plessey Semiconductors and Nanoco Technologies announced a partnership to shrink the pixel size of monolithic microLED displays using Nanoco's cadmium free quantum dot (CFQD quantum dots) semiconductor nanoparticle technology.

Using its existing monolithic process, Plessey will integrate the Nanoco CFQD quantum dots into selected regions of blue LED wafers to add red and green light.

This shrinks the smallest practical pixel size from today's 30um to just 4um, a reduction of 87%.

The process will enable the production of smaller, higher-resolution, microLED displays in applications such as AR/VR devices, watches, and mobile devices, while enhancing both colour rendition and energy efficiency.

For pixels of 30um or greater, colour conversion is currently performed by adding phosphors to the blue die. However, since the smallest phosphor particle is around 30um, the efficiency of colour conversion deteriorates as the pixel size shrinks.

Nanoco's CFQD quantum dot technology overcomes this limitation while facilitating efficient, compact device packaging.

Plessey Corporate and Business Development president said: "Quantum dots offer the best solution for today's emerging display requirements.

"The nano-sized emitters with narrow band emission make them a suitable solution for Plessey's microLED display roadmap, which will see pixels being driven down to 4um in size by 2019."

Nanoco product head Brian Gally commented: "We are thrilled to be working in close collaboration with Plessey, who lead the global field in the development and production of microLED arrays.

"The combination of Plessey's blue microLEDs with Nanoco's red and green cadmium free quantum dots gives display customers the performance they require to rapidly commercialise products."

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