Stable solution-processed molecular n-channel organic field-effect transistors

Area of Science:

• Materials Science
• Organic Electronics
• Semiconductor Physics

Background:

• Organic field-effect transistors (OFETs) are crucial for flexible electronics.
• Developing solution-processable semiconductors is key for low-cost manufacturing.
• Electron-poor organic molecules are essential for n-channel OFETs.

Purpose of the Study:

• To synthesize a new solution-processable small molecule for OFET applications.
• To investigate the performance of OFETs fabricated with this new material.
• To evaluate the stability and processability of the developed semiconductor.

Main Methods:

• Synthesis of a small molecule incorporating naphthalene diimide and tetrazine moieties.
• Fabrication of n-channel organic field-effect transistors (OFETs) via spin-coating and inkjet-printing.
• Characterization of device performance, including electron mobility and stability.

Main Results:

• The synthesized small molecule is solution-processable.
• Spin-coated OFETs on glass achieved electron mobility up to 0.15 cm(2) V(-1) s(-1).
• Inkjet-printed OFETs on plastic substrates demonstrated electron mobility up to 0.17 cm(2) V(-1) s(-1) with excellent stability.

Conclusions:

• The new small molecule is a promising candidate for high-performance, solution-processed n-channel OFETs.
• Inkjet printing offers a viable route for fabricating stable and efficient organic electronic devices on flexible substrates.
• The developed material exhibits excellent environmental and operational stability, crucial for practical applications.