Polymerized Organic Layer for Uniform Films on Heterogeneous Surfaces
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Solution Overview
Problem
Existing organic devices face challenges in achieving uniformity of device characteristics due to the formation of organic thin films on heterogeneous surfaces where multiple components are exposed, leading to nonuniform interfacial energy and potential cracks or nonuniformity in film thickness and alignment, particularly in high-density pixel electrodes.
Innovation Solution
The formation of an organic layer using a polymer of an organic material with a basic molecular skeleton and a polymerizable functional group, which is insoluble in solvents, allows for polymerization across heterogeneous surfaces, reducing interactions at material boundaries and enhancing uniformity by suppressing fluxional processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a printing method or applying method is employed to form an organic thin film on heterogeneous surfaces, then the organic material can be applied to cover pixel electrodes and insulating layers, but the film exhibits nonuniform thickness and alignment due to nonuniform interfacial energy at material boundaries
Solution Approach 1:
The patent changes the physical-chemical parameters of the organic material by using low-molecular-weight materials with specific molecular weights (100-10,000 Da) and controlled solubility characteristics. This parameter optimization enables the material to form uniform films on heterogeneous surfaces by balancing wetting ability and molecular mobility, resolving the contradiction between ease of manufacture and manufacturing precision.
Solution Approach 2:
The patent applies different organic materials with tailored properties to different regions of the heterogeneous surface. By selecting materials with specific solubility parameters and molecular weights suited for particular substrate materials (electrodes vs. insulating layers), the method achieves uniform film formation across diverse surfaces while maintaining local optimality.
2Productivity
If the area and pitch of pixel electrodes are relatively large, then organic thin films can be separately applied to respective pixels, but this approach is not suitable for high-density reduced-size pixels requiring simultaneous coverage
Solution Approach 1:
The patent segments the organic material into low-molecular-weight components with specific molecular weight ranges that enable independent control of film formation kinetics. This segmentation allows the material to simultaneously wet and conform to high-density pixel structures while maintaining uniform thickness, achieving both high productivity and manufacturing precision.
Solution Approach 2:
The patent employs composite organic material systems combining low-molecular-weight compounds with complementary properties. These composite materials exhibit synergistic effects that enable simultaneous coverage of high-density pixels with uniform film formation, resolving the contradiction between productivity and manufacturing precision.
3Reliability
If polymerizable organic materials are used in barrier layers or photoelectric conversion layers, then material stability is improved, but the complexity of material selection and processing increases
Solution Approach 1:
The patent extracts and utilizes only the essential stability-providing components of polymerizable organic materials, specifically selecting low-molecular-weight materials with molecular weights in the 100-10,000 Da range. This extraction approach maintains the stability benefits of polymerizable materials while eliminating the processing complexity associated with full polymerization, achieving reliability without excessive device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach improves the uniformity of device characteristics by minimizing cracks and nonuniformity, ensuring consistent thickness and alignment, thereby reducing noise and enhancing the stability and performance of organic devices.
Implementation Method 1
The organic material contains a basic molecular skeleton and a polymerizable functional group, and, in the polymer, the organic material is polymerized through the polymerizable functional group
Data Source
AI summary
An organic device includes at least one electrode, an insulating layer adjacent to the at least one electrode in a plan view, and an organic layer that is continuously in contact with an upper surface of the at least one electrode and an upper surface of the insulating layer. The organic layer contains a polymer of an organic material. The organic material contains a basic molecular skeleton and a polymerizable functional group. In the polymer, the organic material is polymerized through the polymerizable functional group.