Molecular design and crystallization process control for thin sheet-shaped organic semiconductor crystals with two-dimensional packing

作者：Wan, Yuejuan; Zhang, Zejian; Liu, Haichao; Zhou, Jiadong; Liu, Liqun; Deng, Jian; Ma, Yuguang^*

来源：Journal of Materials Chemistry C, 2022, 10(7): 2556-2561.

DOI：10.1039/d1tc03133c

• SINGLE-CRYSTAL
• EVOLUTION
• GRAPHENE
• GROWTH

Sheet-liked organic semiconductor crystals with two-dimensional (2D) packed structures play an essential role in practical applications of high-property optoelectronic devices. Here, we report a practical example in combination with chemical structures and crystallization engineering to construct a balanced 2D network for organic thin sheet-shaped crystals. The introduction of the cyano group enabled the formation of hydrogen bonds, promoting the in-plane 2D network construction both in strength and direction with pi MIDLINE HORIZONTAL ELLIPSIS pi (or C-HMIDLINE HORIZONTAL ELLIPSIS pi) interactions. Through changing the chamber pressure and growth temperature, we realized a macroscopic morphology adjustment from rods to sheets with the same single crystal structure, ascribed to the relative strength changes of different facet energies. Such a macroscopic dimension control combined with supramolecular chemistry and crystal engineering offers a new perspective for boosting further developments for 2D stacked organic semiconductor crystals.

• 单位
  吉林大学