Programmable and coherent crystallization of semiconductors

Area of Science:

• Materials Science
• Crystallization Engineering
• Nanotechnology

Background:

• Polycrystalline material properties depend on crystal structure and distribution.
• Current methods lack control over microstructure due to stochastic nucleation.

Purpose of the Study:

• To present a universal approach for programming material microstructures.
• To enable controlled crystallization through coherent seeding.

Main Methods:

• Utilizing topographic variations to selectively seed nucleation and growth.
• Patterning seed location and shape to direct crystallization fronts.
• Demonstrating the approach with organic and inorganic polycrystalline semiconductors.

Main Results:

• Achieved precise spatial control over microstructure and texture.
• Created periodic and aperiodic crystalline arrays on demand.
• Fabricated printed organic thin-film transistors with enhanced performance and reproducibility.

Conclusions:

• The coherent seeding method offers unprecedented control over polycrystalline material design.
• This approach facilitates the on-demand fabrication of functional materials with tailored properties.
• Enables sophisticated microstructural engineering for advanced electronic devices.