A pixel comprising at least three sub-pixels (P1, P2, P3; P1', P2', P3'; P1", P2", P3") disposed one alongside the other, each said sub-pixel comprising a respective stack of semi-conducting layers, in which: - each said sub-pixel comprises a first active layer (32, 360), adapted for emitting a light at a first wavelength (λ 1) when an electric current passes through it; - at least one said sub-pixel, termed the first sub-pixel (P1, P1', P1"), also comprises a first (C 11) and a second (C 12) electrode arranged on either side of said first active layer so as to allow an electric current to pass through it; - another of said sub-pixels, termed the second sub-pixel (P2, P2', P2"), also comprises a second active layer (52, 52'), adapted for emitting a light at a second wavelength (λ 2) greater than said first wavelength; - another of said sub-pixels, termed the third sub-pixel (P3, P3', P3"), also comprises a third active layer (22, 6, 320), adapted for emitting a light at a third wavelength (λ 3) greater than said first wavelength and different from said second wavelength; at least one from among said second and third active layers being adapted for emitting said light when it is excited by the light at the first wavelength emitted by said first active layer of the same sub-pixel said pixel being characterized in that: - said first active layer is at least partially transparent to said second wavelength (λ 2); - said second active layer (52, 52') of said second sub-pixel is arranged on a first side of said first active layer and adapted for emitting said light at said second wavelength (λ 2) when it is traversed by an electric current, said second sub-pixel also comprising a third (C 21) and a fourth (C 22) electrode arranged on either side of said second active layer so as to allow an electric current to pass through it without passing through said first active layer; and - said third active layer (22, 6) of said third sub-pixel is arranged on a second side of said first active layer, opposite to said first side, and adapted for emitting said light at said third wavelength (λ 3) when it is excited by the light at the first wavelength emitted by said first active layer of said third sub-pixel, said third sub-pixel also comprising a fifth (C 31) and a sixth (C 32) electrode arranged on either side of said first active layer so as to allow an electric current to pass through it. - each said sub-pixel comprises a first active layer (32, 360), adapted for emitting a light at a first wavelength (λ 1) when an electric current passes through it; - at least one said sub-pixel, termed the first sub-pixel (P1, P1', P1"), also comprises a first (C 11) and a second (C 12) electrode arranged on either side of said first active layer so as to allow an electric current to pass through it; - another of said sub-pixels, termed the second sub-pixel (P2, P2', P2"), also comprises a second active layer (52, 52'), adapted for emitting a light at a second wavelength (λ 2) greater than said first wavelength; - another of said sub-pixels, termed the third sub-pixel (P3, P3', P3"), also comprises a third active layer (22, 6, 320), adapted for emitting a light at a third wavelength (λ 3) greater than said first wavelength and different from said second wavelength; - said first active layer is at least partially transparent to said second wavelength (λ 2); - said second active layer (52, 52') of said second sub-pixel is arranged on a first side of said first active layer and adapted for emitting said light at said second wavelength (λ 2) when it is traversed by an electric current, said second sub-pixel also comprising a third (C 21) and a fourth (C 22) electrode arranged on either side of said second active layer so as to allow an electric current to pass through it without passing through said first active layer; and - said third active layer (22, 6) of said third sub-pixel is arranged on a second side of said first active layer, opposite to said first side, and adapted for emitting said light at said third wavelength (λ 3) when it is excited by the light at the first wavelength emitted by said first active layer of said third sub-pixel, said third sub-pixel also comprising a fifth (C 31) and a sixth (C 32) electrode arranged on either side of said first active layer so as to allow an electric current to pass through it.