A core-extended naphthalene diimide as a p-channel semiconductor

Area of Science:

• Materials Science
• Organic Electronics
• Semiconductor Physics

Background:

• Organic semiconductors are crucial for developing flexible and low-cost electronic devices.
• Naphthalene diimide (NDI) derivatives are widely studied for their electron-transporting capabilities.
• Developing NDI-based materials with balanced charge transport (ambipolarity) remains a challenge.

Purpose of the Study:

• To synthesize a novel naphthalene diimide derivative with an extended conjugated π-core.
• To investigate the charge transport properties of the synthesized organic semiconductor.
• To evaluate its performance in thin-film transistors.

Main Methods:

• One-pot, two-step synthesis of the naphthalene diimide derivative.
• Fabrication of bottom-gate, top-contact thin-film transistors using vacuum deposition.
• Electrical characterization of the transistors to determine charge carrier mobility and current on/off ratio.

Main Results:

• Successful synthesis of a novel naphthalene diimide with a fully conjugated, extended π-core.
• Demonstration of ambipolar charge transport in the organic semiconductor.
• Achieved a high hole mobility of 0.56 cm(2) V(-1) s(-1) and a current on/off ratio of 10(6).

Conclusions:

• The novel naphthalene diimide is a high-performance ambipolar organic semiconductor.
• The extended π-core structure is beneficial for achieving balanced charge transport.
• This material holds significant potential for applications in organic electronics, such as transistors.