Organic Transistor Insulating Layer with Electrophilic Groups
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Solution Overview
Problem
Existing organic thin-film field effect transistors face challenges in achieving improved carrier mobility and optimal electrical resistance between the insulating and semiconductor layers, which limits their performance and efficiency.
Innovation Solution
A circuit board design incorporating a second insulating layer with a compound represented by Formula 1, which includes alkylene groups and electrophilic groups, is used to enhance carrier mobility and reduce the threshold voltage, improving the ON-OFF ratio and overall performance of the transistor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an organic insulating layer containing an aromatic compound is used, then the substrate material properties can be changed by changing the molecular structure, but the carrier mobility is not sufficiently improved and the electrical resistance relationship between insulating layer and semiconductor layer requires complex consideration
Solution Approach 1:
The patent changes the chemical parameter of the insulating layer by introducing electrophilic groups (such as carbonyl, cyano, nitro, or sulfone groups) into the aromatic compound structure. This parameter change directly improves carrier mobility in the organic semiconductor layer while providing a standardized approach to controlling the electrical resistance relationship between layers, eliminating the need for complex case-by-case considerations.
Solution Approach 2:
The patent creates a composite insulating layer material that combines aromatic compounds with electrophilic functional groups. This composite structure leverages the beneficial properties of both components: the aromatic framework provides structural stability and tunability, while the electrophilic groups enhance interfacial electronic interactions to improve carrier mobility and control electrical resistance characteristics.
Data Source
AI summary
A circuit board includes a source electrode, a drain electrode, and a gate electrode provided on a surface of a substrate, a first insulating layer insulating the source electrode and the drain electrode from the gate electrode, an organic semiconductor layer provided so as to contact the first insulating layer, and a second insulating layer provided so as to contact the organic semiconductor layer, wherein the second insulating layer includes a compound represented by Formula 1,where R1 and R2 each independently represent substituted or unsubstituted alkylene group which can have; X1, X2, X3, and X4 each represent hydrogen or an electrophilic group, but not all hydrogen and n represents a number in the range of 100 to 100,000.