title: A General Method for Growing Two-Dimensional Crystals of Organic Semiconductors by "Solution Epitaxy".
abstract: Two-dimensional (2D) crystals of organic semiconductors (2DCOS) have attracted attention for large-area and low-cost flexible optoelectronics. However, growing large 2DCOS in controllable ways and transferring them onto technologically important substrates, remain key challenges. Herein we report a facile, general, and effective method to grow 2DCOS up to centimeter size which can be transferred to any substrate efficiently. The method named "solution epitaxy" involves two steps. The first is to self-assemble micrometer-sized 2DCOS on water surface. The second is epitaxial growth of them into millimeter or centimeter sized 2DCOS with thickness of several molecular layers. The general applicability of this method for the growth of 2DCOS is demonstrated by nine organic semiconductors with different molecular structures. Organic field-effect transistors (OFETs) based on the 2DCOS demonstrated high performance, confirming the high quality of the 2DCOS.
authors.affiliation: Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Science (ICCAS), Beijing, 100190, China.
authors.forename: Chunhui
authors.initials: C
authors.lastname: Xu
authors.affiliation: Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Science (ICCAS), Beijing, 100190, China.
authors.forename: Ping
authors.initials: P
authors.lastname: He
authors.affiliation: Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University & Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300072, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Liu
authors.affiliation: Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Science (ICCAS), Beijing, 100190, China.
authors.forename: Ajuan
authors.initials: A
authors.lastname: Cui
authors.affiliation: Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Science (ICCAS), Beijing, 100190, China.
authors.forename: Huanli
authors.initials: H
authors.lastname: Dong
authors.affiliation: Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Science (ICCAS), Beijing, 100190, China.
authors.forename: Yonggang
authors.initials: Y
authors.lastname: Zhen
authors.affiliation: Department of Chemistry and Department of Physics, National University of Singapore, 3 Science Drive 3, 117543, Singapore, Singapore.
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
authors.affiliation: Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Science (ICCAS), Beijing, 100190, China. huwp@iccas.ac.cn.|Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University & Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300072, China. huwp@iccas.ac.cn.
authors.forename: Wenping
authors.initials: W
authors.lastname: Hu
keywords: 2D materials; organic crystals; organic electronics; organic field-effect transistors; self-assembly