Structured Electrode Design for Efficient Optoelectronic Components
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Summary
Problems
Current optoelectronic components, such as OLEDs, face limitations in light coupling-out efficiency, with external methods achieving only 60-70% efficiency and internal methods being complex and affecting component durability, and often implemented after the organic functional layer system is formed.
Innovation solutions
An optoelectronic component with a structured electrode that has a reflective surface with varying areas to enhance light coupling-out, where the electrode is formed before the organic functional layer structure, allowing for increased lumens per unit area without reducing the component's lifetime, and can be produced using methods like maskless lithography or nanoimprint lithography.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If external coupling-out measures (scattering film, surface structuring) are applied to increase light coupling-out, then light coupling-out efficiency is improved, but the appearance of the organic light emitting diode is significantly influenced and may become milky or diffusely reflective
Why choose this principle:
The patent applies preliminary action by forming the structuring directly on the substrate surface before depositing the organic functional layer system. This early structuring allows light coupling optimization to be achieved without requiring subsequent application of scattering films or surface treatments that would affect appearance. The structuring is created in advance through techniques like lithographic methods, enabling light management before the organic layers are formed.
Principle concept:
If external coupling-out measures (scattering film, surface structuring) are applied to increase light coupling-out, then light coupling-out efficiency is improved, but the appearance of the organic light emitting diode is significantly influenced and may become milky or diffusely reflective
Why choose this principle:
The patent transitions from applying coupling-out measures on the outer surface (external coupling) to creating structuring on the inner substrate surface (internal coupling). This dimensional shift moves the light management interface from the external surface to the internal substrate-organic layer interface, thereby improving light coupling without compromising the external appearance of the device.
Application Domain
Data Source
AI summary:
An optoelectronic component with a structured electrode that has a reflective surface with varying areas to enhance light coupling-out, where the electrode is formed before the organic functional layer structure, allowing for increased lumens per unit area without reducing the component's lifetime, and can be produced using methods like maskless lithography or nanoimprint lithography.
Abstract
In various embodiments, an optoelectronic component is provided. The optoelectronic component may include an electrode, and an organic functional layer structure formed for emitting an electromagnetic radiation or converting an electromagnetic radiation into an electric current. The electrode has a surface which is reflective with respect to the electromagnetic radiation, and wherein the organic functional layer structure is formed on or over the reflective surface of the electrode and is electrically coupled thereto. The reflective surface has a structuring.