Organic light emitting device and method for manufacturing organic light emitting device

Abstract

An organic light-emitting device is proposed having a functional layer stack (10), said functional layer stack having: a substrate (1); a first electrode (2) above said substrate; An organic functional layer stack (4), the organic functional layer stack has an organic light-emitting layer (5); and a second electrode (3) above the organic functional layer stack, wherein the layer (1) of the functional layer stack (10) , 2, 3) forming a carrier layer (6) for a scattering layer (7), wherein the scattering layer (7) has at least one first organic component and a second organic component (71, 72) having a refractive index different from each other, wherein the first organic component (71) is hydrophobic and the second organic component (72) is hydrophilic, wherein the glass transition temperature of the mixture of the first organic component (71) and the second organic component (72) is higher than room temperature , and wherein the first organic component (71) and the second organic component (72) exist partially separately in the scattering layer (7) and the scattering layer between the first organic component and the second organic component (71, 72) ( 7) A mesoscopic boundary layer ( 75 ) or scattering layer ( 7 ) is present as an intermediate phase ( 78 ) with a first organic component and a second organic component ( 71 , 72 ). Furthermore, a method for producing an organic light-emitting device is proposed.

Description

technical field [0001] An organic light emitting device and a method for manufacturing the organic light emitting device are proposed. Background technique [0002] In organic light-emitting diodes (OLEDs), only a part of the generated light is directly coupled out. The rest of the light generated in the active region is distributed onto different loss channels, for example into light absorbed in the substrate and light guided in the substrate, in the transparent electrodes and in the organic layer by waveguide effects and Surface plasmons that can be generated in metal electrodes. The waveguide effect results in particular from differences in the refractive index at the boundary surfaces between the individual layers and regions of the OLED. Typically, in known OLEDs only about a quarter of the light generated in the active region is coupled out into the surroundings, that is to say for example into air, while about 25% of the light generated % is lost due to waveguides ...

AI Technical Summary

Problems solved by technology

However, these method approaches for light outcoupling have significant disadvantages: the outcoupling efficiency is limited to approximately 60% to 70% of the light guided in the substrate, and the appearance of the OLED is significantly affected, since by the applied layers or Thin film creates a milky, diffuse reflective surface

However, these methodological pathways have so far not been implemented commercially in OLED products.

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