Patent ID: 10964905

Abstract:
It is proposed an organic light emitting diode (OLED) cell, comprising a cathode, an anode, the anode being positioned on a substrate, and wherein the organic light emitting diode cell further comprises between said cathode and said anode, an emissive layer and an conductive layer, that generate light when a difference of potential occurs between said cathode and said anode. The organic light emitting diode (OLED) cell further comprises a diffusion layer comprising a set of right circular hollow cylinders, wherein each right circular hollow cylinder being defined by at least a parameter R, named an external radius, and a parameter r, named an internal radius, wherein said parameter R is comprised in a first range with λ being a wavelength of an electromagnetic wave generated by said organic light emitting diode (OLED) cell, and wherein said parameter r is defined such that in a  is comprised in a second range [0.6; 0.8], and wherein each right circular hollow cylinder has a height that is comprised in a third range  wherein n corresponds to a refractive index of said diffusion layer.