BN-Anthracene for High-Mobility Organic Optoelectronic Materials through Periphery Engineering.

Area of Science:

• Materials Science
• Organic Electronics
• Semiconductor Physics

Background:

• Polycyclic aromatic hydrocarbons with boron- and nitrogen- bonds (BN-PAHs) have advanced synthetic chemistry but limited optoelectronic applications.
• Developing high-performance organic semiconductors is crucial for next-generation electronic devices.

Purpose of the Study:

• To explore the optoelectronic potential of BN-PAHs through periphery engineering.
• To design and synthesize novel BN-PAH derivatives for high-mobility applications.

Main Methods:

• Synthesis of tetraphenyl- and diphenyl-substituted BN-anthracenes (TPBNA and DPBNA).
• Fabrication and characterization of organic field-effect transistors (OFETs) and phototransistors.
• Measurement of charge carrier mobility in the synthesized materials.

Main Results:

• Diphenyl-substituted BN-anthracene (DPBNA) achieved a record hole mobility of 1.3 cm² V⁻¹ s⁻¹ in OFETs.
• This mobility surpasses all previously reported BN-PAHs and sets a benchmark comparable to amorphous silicon.
• High-performance phototransistors based on DPBNA were successfully demonstrated.

Conclusions:

• Periphery engineering is an effective strategy to enhance the optoelectronic performance of BN-PAHs.
• DPBNA represents a significant advancement in organic semiconductor materials.
• BN-PAHs hold considerable promise for practical optoelectronic applications.