文献类型：期刊文献

英文题名：Graphene-enhanced intermolecular interaction at interface between copper- and cobalt-phthalocyanines

作者：Dou, Wei-Dong[1,2,3];Huang, Shu-Ping[4];Lee, Chun-Sing[2,3]

机构：[1]Shaoxing Univ, Dept Phys, Shaoxing 312000, Peoples R China;[2]City Univ Hong Kong, Ctr Super Diamond & Adv Films COSDAF, Hong Kong, Hong Kong, Peoples R China;[3]City Univ Hong Kong, Dept Phys & Mat Sci, Hong Kong, Hong Kong, Peoples R China;[4]Univ S Dakota, Dept Chem, Vermillion, SD 57069 USA

年份：2015

卷号：143

期号：13

外文期刊名：JOURNAL OF CHEMICAL PHYSICS

收录：SCI-EXPANDED(收录号：WOS:000362669400043)、、EI(收录号：20154201387194)、Scopus(收录号：2-s2.0-84943805061)、WOS

基金：The work described in this paper was supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region China (Project No. T23-713/11), the Strategic Research Grant of City University of Hong Kong (Project No. 7004190), and the National Natural Science Foundation of China (Grant Nos. 61106131 and 61474077). W. D. Dou would like to thank H. X. Wei for help in photoelectron spectroscopic measurements.

语种：英文

外文关键词：Cobalt - Cobalt metallography - Copper - Copper metallography - Density functional theory - Electronic properties - Electronic structure - Field effect transistors - Photoelectrons - Photons - X ray photoelectron spectroscopy

外文摘要：Interfacial electronic structures of copper-phthalocyanine (CuPc), cobalt-phthalocyanine (CoPc), and graphene were investigated experimentally by using photoelectron spectroscopy. While the CuPc/graphene interface shows flat band structure and negligible interfacial dipole indicating quite weak molecule-substrate interaction, the CuPc/CoPc/graphene interface shows a large interfacial dipole and obvious energy level bending. Controlled experiments ruled out possible influences from the change in film structure of CuPc and pure p-p interaction between CoPc and CuPc. Analysis based on X-ray photoelectron spectroscopy and density functional theory reveals that the decrease in the work function for the CuPc/CoPc/graphene system is induced by the intermolecular interaction between CuPc and CoPc which is enhanced owning to the peculiar electronic properties at the CoPc-graphene interface. (C) 2015 AIP Publishing LLC.