Coffee-Ring Pattern in Semiconductor Droplet Leads to High-Quality Polycrystal Semiconductors

Customized polycrystals that can be used for fabricating highly versatile and faster semiconductors have been developed, due to an accidental observation of crystals that formed a mark similar to the stain left by a coffee cup on a table.

A wide range of electronic and optoelectronic devices are developed using thin-film semiconductors as their base materials. Such devices are typically fabricated through crystallization techniques that produce polycrystals including a disorderly mixture of individual crystals having disparate sizes and orientations.