Multi-color light-emitting device and method of manufacturing such a device

US11424386B2 · kind B2 · utility

Assignee

• COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · FR

Inventor

• Amélie Dussaigne · Bizonnes, FR

Key dates

• Filing date: Oct 22, 2019
• Grant date: Aug 23, 2022
• Expiry date: Oct 22, 2039

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/818

Abstract

A light-emitting device including first, second, and third pixels, wherein: the first pixel includes a two-dimensional light-emitting cell including a vertical stack of a first semiconductor layer of a first conductivity type, of an active layer, and of a second semiconductor layer of the second conductivity type; each of the second and third pixels includes a three-dimensional light-emitting cell including a plurality of nanostructures of same dimensions regularly distributed across the surface of the pixel, each nanostructure including a doped pyramidal semiconductor core of the first conductivity type, an active layer coating the lateral walls of the core, and a doped semiconductor layer of the second conductivity type coating the active layer; and the nanostructures of the second and third pixels have different dimensions and/or a different spacing.