Millimeter‐Sized Molecular Monolayer Two‐Dimensional Crystals

A facile and low-cost solution method is developed to fabricate large-area organic 2D single crystals on a millimeter scale. The 2D crystals are prepared on arbitrary non-crystalline substrates with thicknesses of a single molecular layer and perfect long-range crystalline order. High-performance OFETs are fabricated using the monolayer crystals as the semiconducting layer and the carrier mobility exhibits no thickness dependence, confirming the efficiency of the monolayer for charge transport. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.