Heterogeneous 2D Material Complex for High Mobility
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Solution Overview
Problem
Current two-dimensional materials face challenges in maintaining performance due to scale-down issues and limited application in electronic devices, particularly in achieving high charge mobility and on/off current ratios.
Innovation Solution
A complex of heterogeneous two-dimensional materials is formed, comprising a substrate with a first two-dimensional material layer and a second two-dimensional material layer, where the second layer includes phosphorus atoms covalently bonded, using a phosphorous precursor film and laser irradiation to create violet or black phosphorus, which are then bonded to the substrate via van der Waals forces, protecting them from oxidation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If bulk materials are scaled down to maintain performance, then device size is reduced, but performance degradation occurs
Solution Approach 1:
The patent transitions from three-dimensional bulk materials to two-dimensional material layers with thickness of 1 nm or less. This dimensional reduction allows the material to maintain excellent physical properties and performance while achieving the required small device size, effectively resolving the contradiction between size reduction and performance maintenance
Solution Approach 2:
The patent employs ultra-thin two-dimensional material layers (1 nm or less) as the functional structure. These thin film structures maintain mechanical integrity and electrical performance while enabling significant size reduction, thus solving the contradiction between miniaturization and performance degradation
2Length of moving object
If graphene is used to reduce thickness, then device size is reduced, but charge mobility and on/off current ratio are insufficient
Solution Approach 1:
The patent creates a composite structure consisting of multiple two-dimensional material layers including graphene and other materials with thickness of 1 nm or less. This composite approach combines the advantages of different materials to achieve both ultra-thin profile and excellent charge mobility with sufficient on/off current ratio
Solution Approach 2:
The patent modifies the material composition and structural parameters of the two-dimensional layers to optimize electrical properties. By carefully selecting and combining different two-dimensional materials, the system achieves high charge mobility and appropriate on/off current ratio while maintaining minimal thickness
3Reliability
If phosphorous-based materials are used to achieve high charge mobility, then electrical performance is improved, but oxidation resistance is reduced
Solution Approach 1:
The patent employs an inert atmosphere or protective environment to prevent oxidation of the phosphorous-based two-dimensional material layers. This protective measure allows the material to maintain its high charge mobility properties without degradation from oxidative reactions
Solution Approach 2:
The patent uses ultra-thin two-dimensional material layers (1 nm or less) that can be effectively protected by surface passivation or encapsulation. The thin film structure minimizes the volume susceptible to oxidation while maintaining the bulk-like electrical properties needed for high charge mobility
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 configuration enhances charge mobility and on/off current ratios, enabling the complex to be applied in various electronic devices such as FETs and photodetectors, while maintaining stability and performance even at small thicknesses.
Implementation Method 1
forming a second two-dimensional material layer having a two-dimensional crystal structure on the substrate, the two-dimensional crystal structure of the second two-dimensional material layer including a plurality of phosphorus atoms covalently bonded to each other and being formed by locally irradiating a laser beam onto the phosphorous precursor film
Implementation Method 2
the region of the phosphorous precursor film may be heated to a temperature of about 400 °C to about 1,000 °C by the irradiating the region of the phosphorus precursor film using the laser beam
Implementation Method 3
the first two-dimensional material layer may be bonded to the substrate by van der Waals force in another region between the substrate and the first two-dimensional material layer
Data Source
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AI summary
Provided are a complex of heterogeneous two-dimensional materials and a method of manufacturing the same. The complex of heterogeneous two-dimensional materials may include a substrate; a first two-dimensional material layer on the substrate and having a two-dimensional crystal structure; and a second two-dimensional material layer between the substrate and the first two-dimensional material layer. The second two-dimensional material layer have a two-dimensional crystal structure in which a plurality of phosphorus atoms are covalently bonded to each other.