文献类型：期刊文献

英文题名：Tuning the alignment of pentacene on copper substrate by annealing-assistant surface functionalization*

作者：Cao, Qiao-Jun[1];Wen, Shuang[1];Xie, Hai-Peng[2];Shi, Bi-Yun[1];Wang, Qun[1];Lu, Cong-Rong[1];Gao, Yongli[3];Dou, Wei-Dong[1]

机构：[1]Shaoxing Univ, Lab Low Dimens Carbon Mat, Shaoxing 312000, Peoples R China;[2]Cent South Univ, Sch Phys & Elect, Hunan Key Lab Super Microstruct & Ultrafast Proc, Changsha 410083, Peoples R China;[3]Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA

年份：2020

卷号：29

期号：7

外文期刊名：CHINESE PHYSICS B

收录：SCI-EXPANDED(收录号：WOS:000553939600001)、、EI(收录号：20203609127872)、Scopus(收录号：2-s2.0-85090055359)、WOS

基金：Project supported by the Natural Science Foundation of Zhejiang Province, China (Grant No. LY19F040005) and the National Natural Science Foundation of China (Grant Nos. 61474077 and 51802355).

语种：英文

外文关键词：ultra-thin film; molecular alignment; metal substrate; interfacial tuning

外文摘要：Controlling the alignment and packing structure of organic molecules on solid substrate surfaces at molecule level is essential to develop high-performance organic thin film (OTF) devices. Pentacene, which is a typical p-type semiconductor material usually adopts lying-down geometry on metal substrates owning to pi-d coupling between pentacene and metal substrates. However, in this study, we found that pentacene molecules can be adsorbed on an anneal-treated Cu (111) surface with their long axis perpendicular to substrate surface. Highly ordered single-layer pentacene film with stand-up molecular geometry was achieved on this substrate. It was found that the functionalization of Cu surface with C = O groups due to annealing treatment should be accounted for standing-up geometry of pentacene on Cu substrate. This observation shed light on the tuning of the alignment and packing structure of organic molecules.