中国物理B ›› 2020, Vol. 29 ›› Issue (7): 76801-076801.doi: 10.1088/1674-1056/ab8da2

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

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

Qiao-Jun Cao(曹巧君), Shuang Wen(温爽), Hai-Peng Xie(谢海鹏), Bi-Yun Shi(施碧云), Qun Wang(王群), Cong-Rong Lu(卢从蓉), Yongli Gao(高永利), Wei-Dong Dou(窦卫东)   

  1. 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
  • 收稿日期:2020-02-15 修回日期:2020-04-05 出版日期:2020-07-05 发布日期:2020-07-05
  • 通讯作者: Wei-Dong Dou E-mail:phyth@usx.edu.cn
  • 基金资助:
    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).

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

Qiao-Jun Cao(曹巧君)1, Shuang Wen(温爽)1, Hai-Peng Xie(谢海鹏)2, Bi-Yun Shi(施碧云)1, Qun Wang(王群)1, Cong-Rong Lu(卢从蓉)1, Yongli Gao(高永利)3, Wei-Dong Dou(窦卫东)1   

  1. 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
  • Received:2020-02-15 Revised:2020-04-05 Online:2020-07-05 Published:2020-07-05
  • Contact: Wei-Dong Dou E-mail:phyth@usx.edu.cn
  • Supported by:
    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).

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 π-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

Abstract: 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 π-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.

Key words: ultra-thin film, molecular alignment, metal substrate, interfacial tuning

中图分类号:  (Microscopy of surfaces, interfaces, and thin films)

  • 68.37.-d
68.55.-a (Thin film structure and morphology) 81.15.-z (Methods of deposition of films and coatings; film growth and epitaxy)