NOVELTY - The organic opto-electronic device comprises a carrier substrate (150), an anode electrode layer (140), a cathode electrode layer (110), and an organic electronic active region (120) partially disposed on the anode and cathode electrode layers. The anode and cathode electrode layers have a periodic array (142) of sub-wavelength nanostructures. The organic electronic active region comprises organic layers. The nanostructures have a periodicity of 250-1400 nm, comprise nanoholes having a diameter of 100 nm, and have a depth corresponding to a thickness of the anode electrode layer.    USE - The organic opto-electronic device such as an organic photovoltaic device and an organic LED device (claimed) is useful for powering electronic devices.    ADVANTAGE - The transparent and indium tin oxide-free organic opto-electronic device can be economically manufactured with less power consumption, high stability, anode conductivity and power output and/or power conversion efficiency, enhanced performance, long lifespan and increased illumination intensity.    DETAILED DESCRIPTION - The organic opto-electronic device comprises a carrier substrate (150), an anode electrode layer (140), a cathode electrode layer (110), and an organic electronic active region (120) partially disposed on the anode and cathode electrode layers. The anode and cathode electrode layers have a periodic array (142) of sub-wavelength nanostructures. The organic electronic active region comprises organic layers. The nanostructures have a periodicity of 250-1400 nm, comprise nanoholes having a diameter of 100 nm, and have a depth corresponding to a thickness of the anode electrode layer. The anode layer comprises a metallic material, a semiconductor material, or a conductive polymer material. The anode and cathode electrode layers are partially disposed on the carrier substrate and the organic electronic active region. A work function of the anode layer is compatible with the organic active layer. The organic electronic active region comprises an organic photoactive layer partially disposed on the anode and cathode electrode layers, and an organic emissive electroluminescent layer partially disposed on the anode and cathode electrode layers. The periodic array of sub-wavelength nanostructures has an optical transmission spectrum that corresponds to an optical absorption spectrum of the organic photoactive layer or an optical emission spectrum of the organic emissive electroluminescent layer. The organic emissive electroluminescent layer is configured to emit light. The periodic array of sub-wavelength nanostructures is geometrically, optically and spatially configured to permit the light emitted by the organic emissive electroluminescent layer, and has an optical transmission bandwidth that is configured by selection of a geometric dimension of the nanostructures and the thickness of the anode electrode layer. The optical absorption spectrum is configured by selection of a periodicity of the periodic array of sub-wavelength nanostructures and a material composing the anode electrode layer. The carrier substrate comprises a flexible and/or a rigid material. The device further comprises an organic hole transport layer partially disposed between the anode electrode layer and the organic photoactive layer. The nanostructures: comprise a nanohole array, annular openings concentrically disposed about a central nanohole, and nanoholes arranged in rings concentrically disposed about the central nanohole and the annular opening; and are arranged in a hexagonal, square, rhombic, rectangular or parallelogrammatic lattice. An INDEPENDENT CLAIM is included for a method of manufacturing an organic optoelectronic device.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic cross-sectional view of an organic opto-electronic device.    Cathode electrode layer (110)    Organic electronic active region (120)    Metal anode electrode layer (140)    Periodic array (142)    Carrier substrate. (150)