Tungsten Oxide Nanoparticles for Transparent Electrodes
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Solution Overview
Problem
Current technologies for transparent electrodes, such as ITO films, are expensive and require bulky manufacturing apparatuses, limiting their widespread application and cost-effectiveness, while existing infrared-shielding materials often require high-temperature processes and costly precursors, making them inefficient for large-scale production.
Innovation Solution
Development of a visible-light-transmitting particle-dispersed electrical conductor using tungsten oxide and composite tungsten oxide particles with controlled oxygen content and particle shape, allowing for electrical conductivity while maintaining high visible light transmittance, and the creation of an infrared-shielding nanoparticle dispersion using composite oxide nanoparticles that absorb near-infrared light without the need for bulky equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ITO films are used for transparent electrodes, then electrical conductivity and visible light transmittance are improved, but manufacturing cost and apparatus complexity increase
Solution Approach 1:
The patent replaces the mechanical vacuum deposition system used for ITO films with a chemical solution processing method. Tungsten oxide nanoparticles are dispersed in a solvent to form an ink, which is then applied to the substrate through simple coating techniques, eliminating the need for complex vacuum apparatus while achieving comparable electrical conductivity and transparency
Solution Approach 2:
The patent changes the material form from bulk ITO film to nanoparticle dispersion, and controls the oxidation state of tungsten (W5+ or W6+) to optimize both electrical conductivity and visible light transmittance. The particle size is controlled at 1-100 nm to maintain transparency while providing sufficient conductive pathways
2Object-affected harmful factors
If infrared-shielding materials are used, then near-infrared absorption is improved, but visible light transmittance and manufacturing cost deteriorate
Solution Approach 1:
The patent applies local quality by making the tungsten oxide nanoparticles selectively absorb specific wavelengths. The nanoparticles are engineered to absorb in the near-infrared region (700-2500 nm) while maintaining high transmittance in the visible region (380-780 nm), achieving spectral selectivity that blocks harmful infrared radiation without compromising visible light transmission
Solution Approach 2:
The patent uses composite tungsten oxide materials with controlled oxygen deficiency and specific crystal structures (such as W18O49 Magneli phase) that provide both infrared absorption capability and visible light transparency, combining multiple functional properties in a single material system
3Object-affected harmful factors
If existing infrared-shielding materials are used, then near-infrared absorption is improved, but manufacturing process complexity and temperature requirements increase
Solution Approach 1:
The patent replaces high-temperature physical vapor deposition and complex multi-step manufacturing processes with a simple solution-based coating method. The tungsten oxide nanoparticle ink is applied to substrates and dried at low temperatures, making the process suitable for large-scale production and compatible with temperature-sensitive substrates
Solution Approach 2:
The patent uses readily available tungsten oxide precursors and simple coating materials that can be processed at low cost, eliminating the need for expensive equipment and high-energy processing conditions, thereby enabling cost-effective large-scale manufacturing
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 provides a cost-effective, efficient method for producing transparent electrodes with excellent electrical conductivity and visible light transmittance, and infrared-shielding capabilities, eliminating the need for expensive materials and high-temperature processes.
Implementation Method 1
composite oxide nanoparticles having characteristics in which light in the visible region is transmitted and light in the near infrared region is absorbed
Implementation Method 2
electroconductive particles composed of tungsten oxide and/or a composite tungsten oxide
Data Source
AI summary
An object of the present invention is to provide an infrared-shielding nanoparticle dispersion that has a property whereby visible light is adequately transmitted, and light in the near-infrared region is adequately shielded; an infrared-shielding body manufactured using the infrared-shielding nanoparticle dispersion; a method for manufacturing infrared-shielding nanoparticles that are used in the infrared-shielding nanoparticle dispersion; and infrared-shielding nanoparticles manufactured using the method for manufacturing infrared-shielding nanoparticles. The present invention is a method for manufacturing infrared-shielding nanoparticle dispersion obtained by dispersing infrared-shielding nanoparticles in a medium, an infrared-shielding body manufactured by using the infrared-shielding nanoparticle dispersion, and infrared-shielding nanoparticles used in the infrared-shielding nanoparticle dispersion, wherein the infrared-shielding nanoparticles include a substance expressed by the general formula MXAYW(1-Y)O3 (where M is one or more elements selected from H, He, alkali metals, alkaline-earth metals, rare earth elements, Mg, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au, Zn, Cd, Al, Ga, In, Tl, Si, Ge, Sn, Pb, Sb, B, F, P, S, Se, Br, Te, Ti, Nb, V, Mo, Ta, Re, Be, Hf, Os, Bi, and I; A is one or more elements selected from Mo, Nb, Ta, Mn, V, Re, Pt, Pd, and Ti; W is tungsten; O is oxygen; 0<X≦1.2; 0<Y≦1).