Multilayer Organic Coating Method for OLED Solvent Resistance
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Solution Overview
Problem
Existing methods for producing electronic devices like OLEDs face challenges in forming multilayer structures due to the solubility of organic layers in solvents, limiting the selection of materials and increasing production complexity, especially when using low-molecular-weight organic matter.
Innovation Solution
A method involving the use of a coating solution containing organic matter and a metal or metal oxide, where a first layer is formed using a coating solution A and a second layer is applied directly onto this layer using solution B, ensuring organic solvent resistance and allowing for the formation of multilayer structures by coating methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a coating method is used to form organic layers, then material utilization efficiency is improved and larger area devices can be produced, but the organic layer dissolves in the solvent applied thereon, preventing multilayer structure formation
Solution Approach 1:
The patent changes the molecular weight parameter of the organic matter from low-molecular-weight to high-molecular-weight. High-molecular-weight organic matter is inherently less soluble in common solvents, which prevents the dissolution problem while maintaining the advantages of coating methods such as material utilization efficiency and scalability to larger areas.
Solution Approach 2:
The patent uses composite materials by combining high-molecular-weight organic matter with metal or metal oxide particles. This composite approach not only provides solvent resistance through the high-molecular-weight component but also introduces additional functional properties from the metal/metal oxide component, enabling multilayer structure formation while maintaining coating method advantages.
2Stability of the object's composition
If crosslinking treatment is used to prevent dissolution, then solvent resistance is improved, but production steps become complicated and crosslinking groups must be introduced
Solution Approach 1:
The patent extracts the solvent resistance property from the complex crosslinking process and achieves it directly through the inherent properties of high-molecular-weight organic matter. This eliminates the need for separate crosslinking treatment steps and the introduction of crosslinking groups, simplifying the production process while maintaining solvent resistance.
3Adaptability or versatility
If low-molecular-weight organic matter is used with coating methods, then material selection flexibility is improved, but the organic layer dissolves in the solvent, preventing multilayer structure formation
Solution Approach 1:
The patent changes the molecular weight parameter from low to high, which fundamentally alters the solubility behavior of the organic matter. High-molecular-weight organic matter provides inherent solvent resistance while maintaining versatility in material selection and application to various device structures through coating methods.
Data Source
AI summary
It is intended to provide a method for producing an electronic device having a multilayer structure by a coating method, and a coating solution suitable for the production method. The present invention provides a method for producing an electronic device having at least two or more stacked layers containing organic matter, comprising a first step of applying a coating solution containing organic matter and a metal and/or a metal oxide onto a substrate either directly or via an additional layer to form a mixed layer, and a second step of directly applying a solution containing organic matter onto the mixed layer formed in the first step to form an organic layer. According to this method, an electronic device having a multilayer structure can be produced easily by a convenient coating method.