Patent ID: 7986091
Filing Date: 2011-07-26
Classification: G09F,H01L

Abstract:
1. A diode comprising an organic electroluminescent layer inserted between a lower electrode and an upper electrode, and between a lower reflecting layer and an upper reflecting layer, forming between them a resonant optical cavity for a range of wavelengths of light rays that can be emitted by said electroluminescent layer, wherein λ wherein at least one of the electrodes and the reflecting layer located on the same side as this electrode relative to said electroluminescent layer is transparent or semi-transparent to said emitted light rays, wherein said diode includes at least one light extractor comprising a light entry section, optically coupled to said electroluminescent layer via said electrode and said reflecting layer that are transparent or semi-transparent, a light exit section, which is oriented towards the outside of the diode and has a smaller area than that of the entry section, and reflecting side walls, which are bounded by said entry section and by said exit section, and wherein, in order to limit the range of wavelengths of light rays exiting said diode to an upper limit λ the emitted light rays, that penetrate via its entry section at an angle of emission greater than this cut-off angle θ wherein λ