Tuning the alignment of pentacene on copper substrate by annealing-assistant surface functionalization  

作　　者：Qiao-Jun Cao Shuang Wen Hai-Peng Xie Bi-Yun Shi Qun Wang Cong-Rong Lu Yongli Gao Wei-Dong Dou 曹巧君;温爽;谢海鹏;施碧云;王群;卢从蓉;高永利;窦卫东(Laboratory of Low-dimensional Carbon Materials and Department of Physics,Shaoxing University,Shaoxing 312000,China;Hunan Key Laboratory of Super Microstructure and Ultrafast Process,School of Physics and Electronics,Central South University,Changsha 410083,China;Department of Physics and Astronomy,University of Rochester,Rochester,NY 14627,USA)

机构地区：[1]Laboratory of Low-dimensional Carbon Materials and Department of Physics,Shaoxing University,Shaoxing 312000,China [2]Hunan Key Laboratory of Super Microstructure and Ultrafast Process,School of Physics and Electronics,Central South University,Changsha 410083,China [3]Department of Physics and Astronomy,University of Rochester,Rochester,NY 14627,USA

出　　处：《Chinese Physics B》2020年第7期421-427,共7页中国物理B（英文版）

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

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 toπ-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.

关 键 词：ultra-thin film molecular alignment metal substrate interfacial tuning 

分 类 号：TN386[电子电信—物理电子学] TG174.4[金属学及工艺—金属表面处理] TN312.8[金属学及工艺—金属学]