Organic Single-Crystal Semiconductor Films on a Millimeter Domain Scale

Area of Science:

• Materials Science
• Organic Electronics
• Crystallography

Background:

• Controlling nucleation and growth is crucial for organic semiconductor film performance.
• Existing methods often struggle to achieve large, uniform crystal domains.
• Phase transitions in organic materials present challenges for ordered crystal formation.

Purpose of the Study:

• To introduce and demonstrate a novel template-mediated approach for controlling crystal growth.
• To achieve millimeter-scale crystal domains in organic semiconductor films.
• To enhance the intrinsic hole mobility of organic semiconductor films.

Main Methods:

• Utilized template-mediated molecular crystal seeds during the phase transition process.
• Investigated the effects of this templating strategy on nucleation and growth kinetics.
• Fabricated and characterized organic semiconductor films with controlled crystal structures.

Main Results:

• Successfully controlled nucleation and growth processes in organic semiconductor films.
• Achieved millimeter-scale crystal domains, significantly larger than those from conventional methods.
• Demonstrated an intrinsic hole mobility of 18 cm² V⁻¹ s⁻¹ in the resulting films.

Conclusions:

• Template-mediated molecular crystal seeding is an effective strategy for controlling crystal growth.
• This method enables the formation of large-scale, high-performance organic semiconductor crystals.
• The findings pave the way for advanced applications in organic electronics.