Silver Nanowire Transparent Electrode for Low-Temperature Flexibility
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Solution Overview
Problem
Conventional transparent electrodes, such as ITO films, require high-temperature processing, limiting their application to organic materials, and silver nanowires need improvements in light transmittance and conductivity for flexible and durable solar cells and photoelectric conversion elements.
Innovation Solution
A transparent electrode network using silver nanowires with specific bending angles and a compound containing an alkynyl group and hydroxy group is formed at low temperatures, enhancing conductivity and adhesion between nanowires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ITO film is used as transparent electrode with high-temperature sputtering or annealing, then electrical conductivity is improved, but application to organic materials becomes impossible
Solution Approach 1:
The patent changes the processing temperature parameter from high-temperature sputtering/annealing to low-temperature deposition, enabling the transparent electrode to be applied to organic materials while maintaining acceptable conductivity through silver nanowire network formation
Solution Approach 2:
The patent uses composite silver nanowire structures with controlled bending angles and incorporates compounds with alkynyl groups to create a network that achieves both good conductivity and compatibility with organic substrates
2Adaptability or versatility
If silver nanowires are used as transparent electrode at low temperature, then adaptability to organic materials is improved, but light transmittance and conductivity need further improvement
Solution Approach 1:
The patent optimizes the bending angle parameter of silver nanowires (90° or more) and controls the network minimum radius of curvature (2 μm or less) to improve light transmittance while maintaining low-temperature processing compatibility
Solution Approach 2:
The patent introduces compounds containing alkynyl groups and hydroxy groups as intermediaries to enhance adhesion between silver nanowires, improving conductivity without requiring high-temperature processing
3Illumination intensity
If silver nanowire network has small minimum radius of curvature, then light transmittance is improved, but manufacturing precision control becomes more difficult
Solution Approach 1:
The patent employs self-assembly mechanisms where silver nanowires spontaneously form networks with appropriate curvature and bending angles through controlled deposition processes, reducing the need for precise external control while achieving the desired optical properties
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 solution results in a transparent electrode with reduced electrical resistance and improved light transmittance, suitable for flexible and durable solar cells and photoelectric conversion elements.
Implementation Method 1
a transparent electrode network using silver nanowires with specific bending angles and a compound containing an alkynyl group and hydroxy group is formed at low temperatures, enhancing conductivity and adhesion between nanowires
Data Source
AI summary
Provided are a transparent electrode that can be manufactured at a low temperature, has low sheet resistance, is highly transmissive and lightweight, and allows realization of a flexible solar cell, large-area illumination, and the like, a preparing method of the transparent electrode, and an electronic device using the transparent electrode. A transparent electrode according to an embodiment has a network of silver nanowires. The transparent electrode includes a silver nanowire having a minimum curvature radius r of a curve of 2 μm or less and a bending angle Θ of 90° or more, and a compound having a boiling point of 160° C. or lower and an alkynyl group and a hydroxy group.