表面自由能对二维结晶的影响  

Impact of surface free energy on two-dimensional crystallization

作　　者：姚佳荣 孙玲杰 肖彦玲 刘金雨 揭建胜 刘旭影 杨方旭 孙雅静 李荣金 胡文平 Jiarong Yao;Lingjie Sun;Yanling Xiao;Jinyu Liu;Jiansheng Jie;Xuying Liu;Fangxu Yang;Yajing Sun;Rongjin Li;Wenping Hu(Tianjin Key Laboratory of Molecular Optoelectronic Sciences,Department of Chemistry,School of Science,Tianjin University&Collaborative Innovation Center of Chemical Science and Engineering,Tianjin 300072,China;Joint School of National University of Singapore and Tianjin University,International Campus of Tianjin University,Fuzhou 350207,China;Institute of Functional Nano&Soft Materials(FUNSOM),Jiangsu Key Laboratory for Carbon-Based Functional Materials&Devices,Soochow University,Suzhou 215123,China;Beijing National Laboratory for Molecular Sciences,Key Laboratory of Organic Solids,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China;School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]Tianjin Key Laboratory of Molecular Optoelectronic Sciences,Department of Chemistry,School of Science,Tianjin University&Collaborative Innovation Center of Chemical Science and Engineering,Tianjin 300072,China [2]Joint School of National University of Singapore and Tianjin University,International Campus of Tianjin University,Fuzhou 350207,China [3]Institute of Functional Nano&Soft Materials(FUNSOM),Jiangsu Key Laboratory for Carbon-Based Functional Materials&Devices,Soochow University,Suzhou 215123,China [4]Beijing National Laboratory for Molecular Sciences,Key Laboratory of Organic Solids,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China [5]School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China

出　　处：《Science China Materials》2023年第4期1511-1517,共7页中国科学（材料科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(51873148,52073206,and 52273193);the Collaborative Innovation Program of Tianjin University and Qinghai Minzu University(2022TQ05);Tianjin Science Foundation(20JCQNJC01990);Haihe Laboratory of Sustainable Chemical Transformations。

摘　　要：二维分子晶体是一类具有优异光电性能的新兴材料.然而,由于人们对决定二维结晶的因素知之甚少,二维分子晶体的生长极具挑战.我们研究了有机半导体的二维结晶和表面自由能之间的关系,提出了利用表面自由能各向异性因子来衡量二维结晶趋势的设想.以两个BTBT衍生物为例,我们发现具有大的g因子的分子有不受外界条件干扰的二维结晶趋势.这项工作为合理设计可二维结晶的有机半导体提供了指导.Two-dimensional(2D)molecular crystals are emerging materials with fascinating optoelectronic properties.However,growing 2D organic single crystals is challenging because little is known about the factors that determine 2D crystallization.Herein,we investigated the relationship between 2D crystallization and the surface free energy of organic semiconductors.We proposed a term called surface free energy anisotropy factor(g)to measure the tendency of 2D crystallization.Taking two[1]benzothieno[3,2-b][1]benzothiophene derivatives as examples,we identified that the one with a larger g factor showed a higher tendency for 2D crystallization,irrespective of the external factors.This work provides a guideline for the rational design of organic semi-conductors toward 2D crystallization.

关 键 词：表面自由能 有机半导体 分子晶体 各向异性因子 新兴材料 G因子 外界条件 光电性能 

分 类 号：TB34[一般工业技术—材料科学与工程]