Transparent Electrode Fine Wire and Polymer Composite
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Solution Overview
Problem
Existing organic electronic elements, such as organic electroluminescence elements and solar cells, face challenges with high manufacturing costs and inflexibility due to the use of metal oxide transparent electrodes, which also result in decreased transparency and conductivity, and issues with current leaks and electric field amplification, leading to increased driving voltage and performance degradation.
Innovation Solution
A transparent electrode comprising a first conductive layer of metal or metal oxide fine wires with specific dimensions and a second conductive layer of conductive polymer, where the fine wires have a line width of 20 to 200 μm, height of 0.2 to 2.0 μm, aspect ratio of 0.001 to 0.1, and cross-sectional shape coefficient of 0.6 to 0.9, improving the formation of functional layers and reducing thickness distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal oxide transparent electrode is used, then transparency and conductivity are improved, but manufacturing cost increases and flexibility decreases
Solution Approach 1:
The patent uses a composite structure combining metal or metal oxide fine wires (first conductive layer) with conductive polymer (second conductive layer). This composite material approach allows achieving high transparency and conductivity while enabling flexible manufacturing processes and reducing costs compared to conventional metal oxide electrodes.
Solution Approach 2:
The patent optimizes specific parameters of the fine wires including line width (20-200 μm), height (0.2-2.0 μm), aspect ratio (0.001-0.1), and cross-sectional shape coefficient (0.6-0.9). These parameter changes enable the electrode to achieve desired electrical and optical properties while being compatible with flexible manufacturing.
2Ease of manufacture
If a conductive polymer transparent electrode is used, then manufacturing cost and flexibility are improved, but transparency and conductivity decrease
Solution Approach 1:
The patent combines conductive polymer (second conductive layer) with metal or metal oxide fine wires (first conductive layer) to create a composite electrode. This composite structure compensates for the low conductivity of pure conductive polymer while maintaining its manufacturing advantages and flexibility.
Solution Approach 2:
The patent merges two different conductive materials - metal/metal oxide fine wires and conductive polymer - into a single electrode structure. The metal fine wires provide high conductivity and transparency, while the conductive polymer matrix enables flexible manufacturing and enhances overall electrode performance.
3Reliability
If metal fine wire with high aspect ratio is used, then conductivity is improved, but current leak and electric field amplification occur
Solution Approach 1:
The patent optimizes the aspect ratio of metal fine wires to a specific range (0.001-0.1), which is lower than conventional high aspect ratio designs. This parameter change reduces electric field amplification and current leak while maintaining adequate conductivity through the optimized cross-sectional shape coefficient (0.6-0.9).
Solution Approach 2:
The patent applies different quality requirements to different aspects of the fine wire structure - optimizing line width, height, aspect ratio, and cross-sectional shape coefficient independently. This local quality approach allows achieving balanced performance without excessive aspect ratio that causes harmful effects.
4Reliability
If metal fine wire with large height is used, then conductivity is improved, but thickness distribution of functional layers increases
Solution Approach 1:
The patent limits the height of metal fine wires to 0.2-2.0 μm and optimizes the aspect ratio to 0.001-0.1. These parameter changes ensure that the fine wires do not create excessive thickness variation, allowing functional layers to be deposited uniformly while maintaining adequate conductivity.
Solution Approach 2:
The patent optimizes the cross-sectional shape coefficient (0.6-0.9) to control the distribution of fine wire material. This parameter optimization ensures uniform thickness distribution of the electrode structure, enabling precise manufacturing of functional layers with minimal thickness variation.
Data Source
AI summary
Disclosed is a transparent electrode which is configured of a first conductive layer that is composed of a metal or metal oxide fine wire that is formed in a pattern on a substrate; and a second conductive layer that covers the first conductive layer and contains a conductive polymer. The transparent electrode is characterized in that the fine wire of the first conductive layer satisfies the conditions mentioned below. Also disclosed is an organic electronic element. Line width (W): 20-200 μm Height (H): 0.2-2.0 μm Aspect ratio: 0.001<H/W≦0.1 Coefficient of cross-sectional shape: 0.6<S/(W·H)<0.9 (In this connection, S represents the cross-sectional area of the conductive layer.)