标题：Impact of Graphene Work Function on the Electronic Structures at the Interface between Graphene and Organic Molecules
作者：Wang, Haitao; Yang, Xiangdong; Dou, Weidong; Wang, Peng; Ye, Quanlin; Yang, Xuxin; Li, Baoxing; Mao, Hongying
作者机构：[Wang, Haitao; Yang, Xiangdong; Ye, Quanlin; Yang, Xuxin; Li, Baoxing; Mao, Hongying] Hangzhou Normal Univ, Dept Phys, Hangzhou 311121, Zhejiang, Peop 更多
通讯作者：Li, BX;Mao, HY
通讯作者地址：[Li, BX; Mao, HY]Hangzhou Normal Univ, Dept Phys, Hangzhou 311121, Zhejiang, Peoples R China.
关键词：graphene; self-assembled monolayers; work function; band bending
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 similar to 3.90 eV. On the other hand, the WF of graphene increases to similar 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 C-60 and NH2-SAM modified graphene, a downward band bending is observed.