A General Method for Growing Two-Dimensional Crystals of Organic Semiconductors by "Solution Epitaxy"
A General Method for Growing Two-Dimensional Crystals of Organic Semiconductors by "Solution Epitaxy"
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DOI：
10.1002/anie.201602781
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发表时间：
2016-08-08
影响因子：
16.6
通讯作者：
Hu, Wenping
中科院分区：
文献类型：
--
作者：
Xu, Chunhui;He, Ping;Hu, Wenping
有机半导体二维晶体（2DCOS）在大面积、低成本柔性光电子学中的应用已引起人们的关注。然而，以可控的方式生长大型2DCOS并将其转移到技术上重要的衬底上仍然是关键挑战。在这里，我们报告了一种简便，通用，有效的方法来生长2DCOS高达厘米级的大小，可以有效地转移到任何衬底。该方法称为“溶液外延”，包括两个步骤。第一种是在水面上自组装微米级2DCOS。第二种是将它们外延生长成毫米或厘米大小、厚度为几个分子层的2DCOS。通过9种不同分子结构的有机半导体材料的生长，证明了该方法在2DCOS生长中的普遍适用性。基于2DCOS的有机场效应晶体管（OFFET）表现出高性能，证实了2DCOS的高品质。
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 micrometersized 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.