ITO Nanoparticle Coating Reducing Indium Content
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Solution Overview
Problem
Current methods for producing transparent and conductive layers based on indium tin oxide (ITO) face challenges in achieving reduced indium content while maintaining high conductivity and transparency, particularly for applications in optoelectronics where low indium content is desired for cost-effectiveness and mass production.
Innovation Solution
A process involving the use of ITO nanoparticles, hydrolyzable compounds, and organically modified inorganic binders is employed, where the composition is applied to a substrate and cured, resulting in coatings or moldings with improved conductivity and transparency, allowing for reduced indium content without compromising optical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional gas phase techniques or sputtering processes are used to produce ITO layers, then high conductivity and transparency are achieved, but production costs increase and large-area coatings become difficult
Solution Approach 1:
The patent changes the physical state of ITO from gas phase deposition to nanoparticle suspension form, enabling solution processing techniques that reduce production costs and facilitate large-area coatings while maintaining conductivity through optimized nanoparticle size and concentration parameters
Solution Approach 2:
The patent replaces complex mechanical deposition systems (sputtering, gas phase techniques) with simpler chemical processing methods using nanoparticle suspensions, reducing equipment requirements and production costs while achieving comparable or superior conductivity
2Ease of manufacture
If indium content is reduced to lower costs, then production cost decreases, but conductivity and transparency deteriorate
Solution Approach 1:
The patent creates a composite system combining ITO nanoparticles with organic binders and surfactants, where the composite structure enables reduced indium content while maintaining conductivity through the synergistic effects of the composite components
Solution Approach 2:
The patent optimizes nanoparticle size parameters (reducing to 1-100 nm range) and concentration levels to achieve maximum conductivity with minimum indium content, enabling cost reduction without sacrificing performance
3Illumination intensity
If ITO particles are made smaller to improve transparency, then transparency increases, but particle aggregation occurs reducing effectiveness
Solution Approach 1:
The patent introduces surfactants and organic binders as intermediary substances that prevent nanoparticle aggregation by providing steric or electrostatic repulsion, enabling small particle sizes to be maintained without aggregation while achieving high transparency
Solution Approach 2:
The patent uses organic binder films as a flexible matrix that holds nanoparticles in a dispersed state, preventing aggregation while allowing the thin film structure to maintain high transparency through optimized composition and curing
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 process enables the production of coatings with lower indium content while maintaining or exceeding the conductivity and transparency of traditional ITO layers, making them more cost-effective and suitable for various optoelectronic applications.
Implementation Method 1
They are e.g. B. in the form of thin transparent layers able to reflect infrared light and at the same time are characterized by a relatively high electronic conductivity with transparency in layer systems
Implementation Method 2
thin transparent layers able to reflect infrared light
Implementation Method 3
at least one hydrolyzable compound from group 4, 5, 6, 13 or 14 of the periodic table
Implementation Method 4
curing the composition
Data Source
Figure 1
Figure 2a~2b
Figure 2c~2d
AI summary
The invention relates to a method for producing a coating or a molding based on indium tin oxide (ITO) and having properties similar to those of pure ITO layers with reduced indium content. To this end, a composition of ITO nanoparticles and a hydrolysable compound of 4, 5, 6, 13 or 14 of the periodic table of elements are applied to a substrate or introduced into a mold and the composition is cured. The resulting coatings or moldings have similar properties with respect to conductivity as well as with respect to optical quality and/or have even better properties with respect to conductivity than coatings or moldings made of only ITO.