Weak Epitaxy Growth Affording High-Mobility Thin Films of Disk-Like Organic Semiconductors

摘要

Organic electronics is the focus of increasing research activity due to its potential application in low-cost, flexible, and large-area consumptive productions. A highly oriented and continuous organic thin film is an ideal active layer for achieving high performance organic electronic devices. However, the higher defect concentration in grain boundaries of multi-crystal thin films usually leads to poor carrier transport, especially for disk-like phthalocyanine compounds. Their thin films on amorphous surface are normally composed of needle-like crystals with random orientation, which induces more grain boundaries. Yet, the control of the phthalocyanine molecular orientation in thin film growth process is still challenging.