Fluorinated Organic Semiconductor Polymer for Flexible Transistors
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Solution Overview
Problem
Conventional amorphous silicon thin film transistors face limitations in high-temperature processing, making it difficult to apply them to flexible polymer substrates for flexible displays, and existing organic thin film transistors lack sufficient charge mobility and air stability.
Innovation Solution
Development of an organic semiconductor polymer with a specific chemical structure, represented by Chemical Formula (1), which is synthesized using a solution-based process and includes a terminal functional group, enhancing charge mobility and air stability, and is applied as an active layer in a transistor with a gate, source, and drain electrode configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional amorphous silicon thin film transistor is used, then good uniformity and high electrical characteristics are observed, but it requires high temperature processing about 300°C which makes it difficult to apply to polymer substrate for flexible display
Solution Approach 1:
The patent changes the material parameter from conventional amorphous silicon to organic semiconductor polymer, which fundamentally alters the processing temperature parameter from 300°C to below 150°C, enabling compatibility with flexible polymer substrates while maintaining transistor functionality
Solution Approach 2:
The patent employs composite material design by incorporating fluorinated groups and aromatic heterocyclic structures into the organic semiconductor polymer, creating a material that simultaneously achieves low-temperature processing capability and high electrical performance
2Temperature
If organic thin film transistor is used to enable low temperature processing, then it can be applied to flexible substrate, but charge mobility and air stability are insufficient
Solution Approach 1:
The patent applies local quality modification by introducing fluorinated groups at specific positions on the aromatic heterocyclic rings, which locally enhances electron-withdrawing capability and improves both charge mobility and air stability without compromising the overall low-temperature processing advantage
Solution Approach 2:
The patent optimizes molecular weight parameters of the organic semiconductor polymer to achieve optimal balance between charge mobility and air stability, while maintaining the low processing temperature characteristic that enables flexible substrate application
Data Source
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AI summary
An organic semiconductor polymer, a transistor including an organic semiconductor polymer and methods of fabricating the same are provided, the organic semiconductor polymer including an aromatic or heteroaromatic main chain and at least one of a fluoro or a perfluoroalkyl at a polymer terminal end.