3D Graphene Transparent Electrode via Electrospray
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Solution Overview
Problem
Current methods for preparing large-area graphene transparent electrodes struggle with achieving high transparency and conductivity, as they typically result in two-dimensional structures that limit electrical conductivity and are difficult to apply uniformly across large substrates.
Innovation Solution
A method involving electrospray processing of a conductive polymer solution and a graphene solution, where the graphene is arranged perpendicular to the substrate, forming a three-dimensional structure to enhance conductivity and adhesion, using an electrospray apparatus with nozzles and controlled electric fields to orient graphene vertically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional methods (CVD, mechanical exfoliation) are used to prepare graphene transparent electrodes, then high quality graphene can be obtained, but the substrate area is limited and large-area coating is difficult
Solution Approach 1:
The patent transitions from two-dimensional horizontal stacking of graphene (conventional CVD method) to three-dimensional vertical stacking by arranging graphene perpendicular to the substrate through electrospray processing. This dimensional change enables large-area coverage while maintaining graphene quality
Solution Approach 2:
The patent replaces mechanical exfoliation and CVD processes with electrospray processing. The electrospray apparatus uses electric field to orient graphene vertically, substituting mechanical assembly methods with an electric field-based approach that enables scalable large-area production
2Reliability
If graphene is arranged in two-dimensional horizontal stacking, then the structure is simple, but electrical conductivity is limited
Solution Approach 1:
The patent transforms the graphene arrangement from two-dimensional horizontal stacking to three-dimensional vertical stacking, with graphene oriented perpendicular to the substrate. This dimensional transformation creates multiple conduction pathways, significantly improving electrical conductivity despite increased structural complexity
Solution Approach 2:
The patent creates a composite structure where vertically arranged graphene layers are combined with conductive polymer matrix. This composite approach enhances electrical conductivity by providing both direct graphene conduction pathways and polymer-based conduction networks
3Ease of manufacture
If ITO or ZTO is used as transparent electrode, then good transparency and conductivity are achieved, but manufacturing cost is high and flexibility is limited
Solution Approach 1:
The patent replaces expensive ITO and ZTO materials with graphene, which can be produced at lower cost through electrospray processing. Although graphene requires precise orientation, the electrospray method enables cost-effective large-area production while maintaining optical and electrical performance
Solution Approach 2:
The patent changes the physical and chemical parameters of the transparent electrode by using carbon-based graphene instead of metal oxide (ITO/ZTO). This material substitution, combined with vertical arrangement and conductive polymer integration, achieves comparable or superior transparency and conductivity at lower manufacturing cost
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
This approach enables the production of large-area, high-transparency, and high-conductivity graphene transparent electrodes with improved electrical properties compared to traditional methods, achieving optical transmittance of 80% or more and sheet resistance of 1,100 Ω/cm² or less.
Implementation Method 1
spraying the conductive polymer solution and the graphene solution on the substrate by an electrospray process using an electrospray apparatus including a nozzle
Implementation Method 2
spraying the conductive polymer solution and the graphene solution on the substrate by an electrospray process
Implementation Method 3
spraying the conductive polymer solution and the graphene solution on the substrate by an electrospray process
Data Source
AI summary
Provided are a method of preparing a large-area, three-dimensional graphene transparent electrode using an electrospray deposition method and a large-area, three-dimensional graphene transparent electrode prepared therefrom. More particularly, the present invention is related to a method of preparing a large-area, three-dimensional graphene transparent electrode using an electrospray deposition method, which may easily prepare a large-area graphene transparent electrode having high transparency and conductivity through an electrospray process and may obtain effects, which may not be realized in a two-dimensional transparent electrode prepared by a typical method such as CVD, due to a three-dimensional stack structure in which graphene is arranged perpendicular to a substrate, and a large-area, three-dimensional graphene transparent electrode prepared therefrom.