High-performance, solution-processed organic thin film transistors from a novel pentacene precursor

Area of Science:

• Organic electronics
• Materials science
• Chemical synthesis

Background:

• Pentacene is a key organic semiconductor but is difficult to process from solution.
• Solution-processing methods are desirable for large-scale, low-cost fabrication of organic electronic devices.

Purpose of the Study:

• To develop a soluble precursor for pentacene that enables solution processing.
• To achieve high-performance organic thin film transistors (OTFTs) using a solution-processed semiconductor.

Main Methods:

• A Lewis acid-catalyzed Diels-Alder reaction was used to synthesize a soluble pentacene adduct with N-sulfinylacetamide.
• Thin films of the adduct were prepared using spin-coating.
• Solid-phase thermal conversion of the adduct to pentacene was performed at moderate temperatures.

Main Results:

• A soluble pentacene adduct was successfully synthesized.
• Spin-coated films of the adduct could be converted to pentacene thin films.
• Organic thin film transistors fabricated using this method demonstrated the highest mobility reported for solution-processed organic semiconductors.

Conclusions:

• The developed adduct provides a viable route for solution processing of pentacene.
• This method significantly advances the performance of solution-processed organic electronics.
• The findings pave the way for high-performance, low-cost organic electronic devices.