US 12,364,135 B2
OLED-waveguide assembly and production method therefor
Martina Gerken, Kiel (DE); Janek Buhl, Kiel (DE); Matthias Bremer, Regensburg (DE); and Sabrina Hein, Bargstedt (DE)
Assigned to Christian-Albrechts-Universitaet zu Kiel, Kiel (DE)
Appl. No. 17/760,655
Filed by Christian-Albrechts-Universitaet zu Kiel, Kiel (DE)
PCT Filed Sep. 12, 2020, PCT No. PCT/DE2020/100796
§ 371(c)(1), (2) Date Mar. 15, 2022,
PCT Pub. No. WO2021/052532, PCT Pub. Date Mar. 25, 2021.
Claims priority of application No. 10 2019 124 950.3 (DE), filed on Sep. 17, 2019.
Prior Publication US 2022/0336779 A1, Oct. 20, 2022
Int. Cl. H10K 59/38 (2023.01); H10K 50/13 (2023.01); H10K 50/816 (2023.01); H10K 50/858 (2023.01); H10K 59/80 (2023.01)
CPC H10K 59/38 (2023.02) [H10K 50/131 (2023.02); H10K 50/816 (2023.02); H10K 50/858 (2023.02); H10K 59/879 (2023.02)] 9 Claims
OG exemplary drawing
 
1. An OLED waveguide assembly (1) comprising an organic light emitting diode assembly (11), a waveguide layer (13) and a substrate (14), wherein
the organic light emitting diode assembly (11) is separated from the waveguide layer by a spacer layer (12),
the organic light-emitting diode assembly (11), the spacer layer (12), the waveguide layer (13) and the substrate (14) are materially interconnected in a layer stack,
the emission of the organic light-emitting diode assembly (11) has maximum emission at a wavelength of around 470 nanometers,
the waveguide layer (13) is nanostructured,
the waveguide layer (13) and the spacer layer (12) are made of organic material,
the spacer layer (12) is transparent to light from the organic light-emitting diode assembly (11) and light from the waveguide layer (13),
the organic light-emitting diode assembly (11) is a primary light source,
the substrate (14) has pixel-dependent nanostructures on the surface, which nanostructures can be identical pixel by pixel or slightly different, which are formed with a lattice constant of approximately 400±50 nanometers to match the emissions of the waveguide layer (13),
the spacer layer (12) has a layer thickness of 300 to 500 nanometers, the waveguide layer (13) itself consists of luminescent material or has a layer made of luminescent material situated in front,
the waveguide layer (13) or the layer situated in front of the waveguide has the function of a wavelength converter with maximum absorption around 470 nanometers and with maximum emission around 620 nanometers, and
the substrate (14) is the outer side of the assembly at the light exit surface, or
the substrate (14) is the outer side of the assembly at the light exit surface and additionally a wavelength-selective (dichroic) layer and/or a long-pass filter is integrated into the layer stack on the light exit surface.