Asymmetric heterojunctions between size different 2D flakes intensify the ionic diode behaviour

Here we report on the facile formation of asymmetric heterojunctions between laterally size different 2D flakes, which leads to a prominent gradient in charge distribution at the nanocontact interface and triggers ionic diode-like transport behaviour with a rectification ratio of 110.

Automated summary

Here we describe a simple method for forming asymmetric heterojunctions between two-dimensional flakes of different sizes. The resulting heterojunctions exhibit a prominent gradient in charge distribution at the nanocontact interface, leading to ionic diode-like transport with a rectification ratio of 110.