Multi-colour electroluminescent display device and method for manufacturing such a device

Light-emitting device comprising first and second light-emitting cells adapted to respectively emitting in first and second wavelength ranges, wherein:

• each light-emitting cell comprises a stack of a first layer of a first semiconductor material and of a second layer of a second semiconductor material having a mesh parameter different from that of the first material;
• in the first cell, the first layer is in contact with the second layer across the entire surface of the cell;
• and
• in the second cell, a mask provided with a plurality of through nano-openings regularly distributed across the entire surface of the cell forms an interface between the first layer and the second layer, the second layer comprising a plurality of nanopillars of the second material arranged in the nano-openings of the mask, in contact, by a first surface, with the first layer, and a coalesced layer of the second material in contact with a second surface of the nanopillars opposite to the first layer, extending across substantially the entire surface of the cell on the side of the mask opposite to the first layer,
• and wherein, in each cell, the second layer is topped with an active layer.