Plessey Semiconductors

Plessey Semiconductors is a UK-based leading developer of advanced optoelectronic technology solutions, operating as the UK’s only LED manufacturer and the only LED maker globally commercializing LEDs on silicon substrates using their award-winning proprietary GaN-on-Silicon platform. The company has connections to quantum technology through partnerships integrating Nanoco Technologies’ cadmium-free quantum dot semiconductor nanoparticle technology into their monolithic microLED displays for augmented reality and virtual reality applications. With leading-edge 150mm and 200mm wafer processing facilities in Plymouth and comprehensive photonic characterization laboratories, Plessey provides full-field emissive microLED displays combining high-density RGB pixel arrays with CMOS backplanes, with potential applications in optical processing units for AI operations that are faster and more energy-efficient than traditional silicon devices.

2025 Developments: The company continues its quantum technology initiatives throughout 2025. Focus remains on advancing core technologies and expanding market presence. Ongoing development activities position the company for future growth in the quantum industry.

Company Information

• Founded: 1957
• Country: United Kingdom
• Website: https://plesseysemiconductors.com
• Categories: quantum infrastructure, quantum photonics

Key People

David Hayes (CEO, Haylo Labs), Keith Strickland (CTO)

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