Organic Semiconductor Compound for Flexible Display Charge Mobility
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current organic thin film transistors face challenges in achieving high charge mobility and crystallinity, particularly due to limitations in the structure and composition of organic semiconductors used in flexible display devices.
Innovation Solution
A compound with a condensed polycyclic aromatic structure, featuring an asymmetric core and specific heteroatom arrangements, is developed, which improves crystallinity and charge transport properties when integrated into thin film transistors, enhancing the performance of organic thin film transistors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional organic semiconductors are used in thin film transistors, then the device can be manufactured with solution processes, but the charge mobility and crystallinity remain limited
Solution Approach 1:
The patent changes the molecular structure parameters of the organic semiconductor by introducing a condensed polycyclic aromatic core with specific heteroatom arrangements (X1, X2, X3 being N, O, or S) and substituent groups (R1-R6). This structural parameter change enables the material to achieve high charge mobility (μ ≥ 10^-5 cm²/Vs) while maintaining solution processability, resolving the contradiction between ease of manufacture and charge mobility
Solution Approach 2:
The patent creates a composite molecular structure combining a rigid condensed polycyclic aromatic core with flexible substituent groups (alkyl, alkoxy, aryl, heteroaryl groups). This composite structure achieves both high crystallinity for charge mobility and compatibility with solution processing methods, simultaneously addressing manufacturing ease and device performance
2Ease of manufacture
If the organic semiconductor structure is simplified for ease of synthesis, then manufacturing becomes easier, but crystallinity and charge transport properties deteriorate
Solution Approach 1:
The patent segments the organic semiconductor molecule into distinct functional modules: a condensed polycyclic aromatic core (providing crystallinity) and substituent groups (providing synthesis accessibility). This segmentation allows independent optimization of each module, enabling high crystallinity through the core structure while maintaining ease of synthesis through modular substituent attachment
Solution Approach 2:
The patent applies local quality by concentrating the crystallinity-enhancing fused ring structures in the core region while placing synthesis-friendly substituent groups at peripheral positions. This local differentiation allows the core to provide high crystallinity (improving manufacturing precision) while the substituents maintain ease of synthesis through standard organic chemistry reactions
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Disclosed are a compound represented by Chemical Formula 1A or 1B, an organic thin film including the same, a thin film transistor, and an electronic device. In Chemical Formula 1A or 1B, X1, X2, Ar1, R1 to R4, and n1 are the same as described in the detailed description.