Optoelectronic Assembly Organic Functional Layer Adhesion
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Solution Overview
Problem
Conventional optoelectronic assemblies face challenges with insufficient adhesion and chemical reactivity between conductive layers and dielectric structures, leading to electrical shorts and limited material choices, which hinder the formation of efficient and transparent electrodes.
Innovation Solution
The optoelectronic assembly features a dielectric structure overlapped by an organic functional layer, allowing for a thin, conductive second electrode to be formed without physical contact with the dielectric, enhancing adhesion and conductivity while eliminating the need for buffer layers, using cost-effective materials like bisphenol-A derivatives and silver electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a thin second electrode is formed to achieve transparency, then light transmittance is improved, but adhesion to the dielectric structure becomes insufficient
Solution Approach 1:
The patent introduces an organic functional layer structure as an intermediary between the thin transparent second electrode and the dielectric structure. This intermediate layer provides both mechanical support for adhesion and electrical insulation, allowing the thin electrode to maintain good light transmittance while achieving sufficient bonding strength through the organic layer's adhesive properties.
2Adaptability or versatility
If conventional dielectric structures are used with thin electrodes, then material compatibility is limited, but chemical reactivity and adhesion issues arise
Solution Approach 1:
The organic functional layer structure serves as a chemical intermediary that is compatible with both the dielectric structure and the thin metal electrode. This layer prevents direct chemical reactions between incompatible materials while providing adequate adhesion, thereby expanding material selection flexibility and ensuring long-term chemical stability of the device.
Solution Approach 2:
The patent employs a composite structure consisting of the dielectric structure, organic functional layer, and metal electrode. This multi-material composite approach allows each layer to contribute its specific properties (mechanical support, adhesion, electrical conductivity, chemical stability) while working together to resolve the contradictions between material compatibility and chemical reactivity.
Data Source
AI summary
An optoelectronic assembly including an optically active region configured for emitting and/or absorbing light, and an optically inactive region configured for component-external contacting of the optically active region is provided. The optically inactive region includes a dielectric structure and a first electrode on or above a substrate, an organic functional layer structure on the first electrode in physical contact with the first electrode and the dielectric structure, and a second electrode in physical contact with the organic functional layer structure and above the dielectric structure, wherein the organic functional layer structure at least partly overlaps the dielectric structure in such a way that the part of the second electrode above the dielectric structure is free of a physical contact of the second electrode with the dielectric structure.