High-Mobility Organic Semiconductor for Stable Transistors
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Summary
Problems
Existing organic semiconductor materials have low carrier mobility, making them unsuitable for high-performance liquid crystal display and organic electroluminescence devices, and they require complex heat treatment processes for high mobility, leading to variability in transistor performance.
Innovation solutions
A benzothienobenzothiophene derivative with a particular arylene acetylene structure that crystallizes through a high-order liquid crystal phase, allowing for the formation of a high-mobility film without complex heat treatment, ensuring small mobility variation during printing.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If conventional organic semiconductor materials are used in thin-film transistors, then the manufacturing cost is reduced and low-temperature processing is enabled, but the carrier mobility is insufficient (less than 1 cm2/Vs) resulting in decreased response speed
Why choose this principle:
The patent modifies the molecular structure parameters of organic semiconductor materials by introducing specific substituents (alkyl groups, alkoxy groups, aryl groups) at defined positions on the benzothienobenzothiophene core, thereby optimizing carrier mobility while maintaining solution-processability and low-temperature fabrication capabilities
Principle concept:
If conventional organic semiconductor materials are used in thin-film transistors, then the manufacturing cost is reduced and low-temperature processing is enabled, but the carrier mobility is insufficient (less than 1 cm2/Vs) resulting in decreased response speed
Why choose this principle:
The patent creates composite molecular structures by combining the BTBT core with various functional groups and substituents, achieving a balance between high carrier mobility and processability requirements for flexible display applications
Application Domain
Data Source
AI summary:
A benzothienobenzothiophene derivative with a particular arylene acetylene structure that crystallizes through a high-order liquid crystal phase, allowing for the formation of a high-mobility film without complex heat treatment, ensuring small mobility variation during printing.
Abstract
The present invention, the present invention relates to an organic semiconductor material having a benzothienobenzothiophene skeleton, an organic semiconductor ink containing the organic semiconductor material, and an organic transistor using the organic semiconductor material. An object of the present invention is to provide an organic semiconductor material that easily provides a film having a high carrier mobility without the need for a complicated process. It was found that a BTBT derivative having a particular arylene acetylene structure is crystallized by way of a high-order liquid crystal phase having a highly ordered molecular arrangement, and thus the BTBT derivative easily forms a film having a high mobility without requiring complicated heat treatment even when the film is formed by printing. This finding led to the achievement of the object.