Tetraazapyrene Core Organic Semiconductors for Charge Transport
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for improved n-type organic semiconducting materials with enhanced properties such as charge-carrier mobility, on/off ratio, oxidative stability, and long lifetime for use in electronic devices, as current materials do not meet the requirements for advanced applications like organic photodetectors and solar cells.
Innovation Solution
Development of organic semiconducting compounds with a tetraazapyrene core, specifically designed to improve charge transport and stability, which can be used in blends with other compounds to create materials for various electronic devices, including organic photodetectors and solar cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional n-type organic semiconducting materials are used, then device fabrication is simpler, but charge-carrier mobility is insufficient for advanced applications
Solution Approach 1:
The patent modifies the molecular structure of n-type organic semiconducting materials by introducing a tetraazapyrene core with specific substituents (R1-R6 groups), changing chemical parameters to achieve both high charge-carrier mobility and oxidative stability simultaneously
Solution Approach 2:
The invention creates composite molecular structures combining the tetraazapyrene core with various functional groups (electron-withdrawing groups, aromatic hydrocarbyl groups, heteroaryl groups) to achieve synergistic effects that improve both charge transport and stability
2Reliability
If existing organic semiconducting materials are used, then material synthesis is easier, but on/off ratio is insufficient for high-performance devices
Solution Approach 1:
The molecular structure is segmented into distinct functional modules: the tetraazapyrene core (formula I) and separate substituent groups (R1-R6), allowing systematic optimization of each module's contribution to on/off ratio while managing overall complexity
Solution Approach 2:
Different regions of the molecule are assigned specific functions: the core provides charge transport capability while specific substituents (electron-withdrawing groups at R2-R4) enhance electron affinity and on/off ratio, creating local functional optimization
3Duration of action of stationary object
If current n-type materials are used, then device manufacturing is simpler, but lifetime is insufficient for long-term applications
Solution Approach 1:
The patent optimizes molecular parameters including molecular weight, glass transition temperature, and solubility by selecting specific substituent groups (R1-R6) to achieve both long device lifetime and good processability through solution-based fabrication methods
Data Source
AI summary
The present invention relates to organic semiconducting compounds of formula (I) wherein X1 is C, Si or Ge; X2 is 0, S or Se; and X3 is N or P as well as to organic electronic devices comprising such organic semiconducting compounds. (I)