Graphene CVD on Non-Metallic Substrates Using Branched Precursors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for manufacturing high-quality graphene on non-metallic surfaces are limited in terms of efficiency, reliability, and ability to produce large area graphene suitable for direct use in electronic devices.
Innovation Solution
A method involving chemical vapour deposition (CVD) is developed, where graphene is formed on non-metallic surfaces using a precursor consisting of C4-C10 organic compounds with at least three methyl groups, which improves the quality and efficiency of graphene production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If methane or simple hydrocarbon precursors are used for graphene growth, then the process is simple and cost-effective, but the electronic properties of the resulting graphene are insufficient
Solution Approach 1:
The patent changes the chemical composition parameters of the precursor from simple hydrocarbons (methane, ethane) to complex organic compounds containing heteroatoms (N, O, S, P, halogens). This parameter change in precursor complexity directly improves the electronic properties of the grown graphene, including carrier mobility and defect density, while maintaining process simplicity.
2Manufacturing precision
If conventional CVD methods are used on non-metallic substrates, then additional process steps are avoided, but the graphene quality and uniformity are insufficient
Solution Approach 1:
The patent modifies the chemical parameters of the precursor to include specific heteroatom-containing organic compounds that enable high-quality graphene growth directly on non-metallic substrates. This allows achieving excellent graphene uniformity and quality without requiring additional process steps, thus resolving the contradiction between manufacturing precision and ease of manufacture.
3Reliability
If large area graphene is produced for direct device use, then additional contamination steps are avoided, but achieving high quality across the entire area becomes difficult
Solution Approach 1:
The use of complex organic precursors with heteroatoms enables high-quality graphene to be grown uniformly across large substrate areas in a single CVD process. The specific chemical composition of these precursors ensures consistent graphene properties throughout the entire growth area, eliminating the need for additional contamination-free processing steps.
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 method results in high-quality graphene with improved electronic properties, such as increased carrier mobility and reduced defect density, making it suitable for a wide range of electronic devices.
Implementation Method 1
heating a substrate held within a reaction chamber to a temperature that is within a decomposition range of a carbon based precursor for graphene growth
Implementation Method 2
forming graphene on a non-metallic surface of a substrate by CVD in a CVD reaction chamber
Data Source
AI summary
There is provided a method for manufacturing graphene, the method comprising: forming graphene on a non-metallic surface of a substrate by CVD in a CVD reaction chamber, wherein the step of forming graphene comprises introducing a precursor in a gas phase and/or suspended in a gas into the CVD reaction chamber; wherein the precursor consists of one or more compounds selected from a C4-C10 organic compound; wherein the organic compound is branched such that the organic compound has at least three methyl groups; and wherein the organic compound consists of carbon and hydrogen and, optionally, oxygen, fluorine, chlorine and/or bromine.