MA02.05.15 : Two-Dimensional N-Type Molecular Single-Crystalline Films with High Charge Carrier Mobility

5:00 PM–7:00 PM Apr 4, 2018

PCC North, 300 Level, Exhibit Hall C-E

Cong Wang1 Xiaotao Zhang1 Wenping Hu1

1, Tianjin University, Tianjin, , China

Two-dimensional (2D) crystal films of organic semiconductors have attracted widespread attention for large-area and low-cost flexible optoelectronics due to their unique advantages of molecular designability, excellent flexibility and solution processability. The 2D crystal films of a series of p-type organic semiconductors are grown up to centimeter size with thickness of several molecular layers by “solution epitaxy” and a carrier mobility exceed 10 cm2 V-1 s-1 is achieved in our previous work. However, it remains challenging to achieve high mobility, air-stable and solution-processed organic field-effect transistors (OFETs) based on 2D crystal films of n-type materials with a performance comparable to that of p-type organic semiconductors. Here, a modified technique is demonstrated to grow 2D single crystals of n-type organic semiconductors from solution, enabling high-mobility electron transport in OFET devices.