Transparent Electrode Nitrogen Layer Suppresses Silver Agglomeration
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Solution Overview
Problem
Existing transparent electrodes, particularly those using silver and aluminum, face challenges in achieving both sufficient electrical conductivity and light transmission properties simultaneously.
Innovation Solution
A transparent electrode configuration is developed, featuring a nitrogen-containing layer with specific unshared electron pair content and a silver-based electrode layer, which interacts to suppress silver agglomeration, ensuring uniform film growth and improved conductivity while maintaining light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a metallic material such as silver is made into a thin film to reduce cost and improve light transmission, then light transmission property is improved, but electrical conductivity becomes insufficient
Solution Approach 1:
The patent uses a composite structure consisting of a nitrogen-containing organic compound layer and a silver main component layer. The nitrogen-containing layer with specific unshared electron pair content interacts with silver to suppress agglomeration, while the silver layer provides high electrical conductivity. This composite approach allows achieving both sufficient electrical conductivity and light transmission property that cannot be obtained by single materials alone.
2Illumination intensity
If the film thickness of silver is reduced to improve light transmission, then light transmission property is improved, but electrical conductivity decreases
Solution Approach 1:
The patent changes the chemical parameter of the organic compound layer by controlling the unshared electron pair content [n/M] to be 2.0×10^-3 ≤ [n/M]. This parameter change affects the interaction between the organic layer and silver, suppressing silver agglomeration and enabling uniform thin film formation. As a result, sufficient electrical conductivity is achieved even at reduced film thickness, maintaining both light transmission and conductivity.
3Reliability
If silver is blended with aluminum to ensure electrical conductivity at smaller thickness, then electrical conductivity is improved, but light transmission property deteriorates
Solution Approach 1:
The nitrogen-containing organic compound layer acts as an intermediary between the substrate and the silver layer. By controlling the unshared electron pair content, this intermediary layer suppresses silver agglomeration during film formation, enabling uniform distribution of silver at very thin thickness. This eliminates the need for aluminum blending, maintaining high light transmission while ensuring sufficient electrical conductivity.
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
The configuration achieves both enhanced electrical conductivity and light transmission, improving the performance of electronic devices and organic electroluminescent elements by preventing silver agglomeration and ensuring a uniform, thin electrode layer.
Implementation Method 1
a nitrogen-containing layer that is constituted using a compound containing nitrogen atoms, and that has an effective unshared electron pair content [n/M] of 2.0×10−3≤[n/M] when n is a number of unshared electron pairs that are not involved in aromaticity and that are not coordinated with a metal
Data Source
AI summary
A transparent electrode comprising a nitrogen-containing layer, and an electrode layer provided adjacent to the nitrogen-containing layer and having silver as a main component. The nitrogen-containing layer is configured using a compound containing nitrogen atoms, wherein the effective unshared electron pair content [n/M] is 2.0×10−3≤[n/M], n being the number of unshared electron pairs that are not involved in aromaticity and that are not coordinated with the metal from among the unshared electron pairs of the nitrogen atoms, and M being the molecular weight.