Two-dimensional molecular crystalline semiconductors towards advanced organic optoelectronics

The compelling demand for higher performance and lower cost in the optoelectronics industry has driven the development of organic semiconductors. Molecular crystalline semiconductors (MCSs), especially two-dimensional MCSs (2D-MCSs), possess intrinsic ordered structure, quantum confinement effect, high mobility, unique optical and electrical properties, and more ecological and cheaper production, which make great promises in high-performance optoelectronic applications. Here we provide a review of design principles and synthetic strategies for 2D-MCS materials, exploiting their potential as a revolution option in associated optoelectronic devices. The merits and limitations of each strategy are presented, and these molecular crystals are considered as a competitive choice for emerging semiconducting materials in information science. Finally, the current challenges and future perspectives in this field are also elaborated.