Impact of Graphene Work Function on the Electronic Structures at the Interface between Graphene and Organic Molecules

Nanomaterials

Peng Wang¹  Haitao Wang²  Xuxin Yang²  Quanlin Ye²  Xiangdong Yang²  Baoxing Li²  Hongying Mao²  Weidong Dou³ 

[1] Department of Applied Physics, College of Electronic and Information Engineering, Shandong University of Science and Technology, Qingdao 266590, China;Department of Physics, Hangzhou Normal University, Hangzhou 311121, China;Laboratory of Low-dimensional Carbon Materials, Physics Department, Shaoxing University, Shaoxing 312000, China;

关键词: graphene;    self-assembled monolayers;    work function;    band bending;   

DOI  :  10.3390/nano9081136

来源: DOAJ

【 摘 要 】

The impact of graphene work function (WF) on the electronic structure at the graphene/organic interface has been investigated. WF manipulation of graphene is realized using self-assembled monolayers (SAMs) with different end groups. With this method, the upper surface of the functionalized graphene remains intact, and thus precludes changes of molecular orientation and packing structures of subsequently deposited active materials. The WF of NH₂-SAM functionalized graphene is ~3.90 eV. On the other hand, the WF of graphene increases to ~5.38 eV on F-SAM. By tuning the WF of graphene, an upward band bending is found at the ZnPc/graphene interface on F-SAM. At the interface between C₆₀ and NH₂-SAM modified graphene, a downward band bending is observed.

【 授权许可】

Unknown