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Title: Molecular orientation of copper phthalocyanine thin films on different monolayers of fullerene on SiO{sub 2} or highly oriented pyrolytic graphite

The interface electronic structures of copper phthalocyanine (CuPc) have been studied using ultraviolet photoemission spectroscopy as different monolayers of C{sub 60} were inserted between CuPc and a SiO{sub 2} or highly ordered pyrolytic graphite (HOPG) substrate. The results show that CuPc has standing up configuration with one monolayer of C{sub 60} insertion on SiO{sub 2} while lying down on HOPG, indicating that the insertion layer propagates the CuPc-substrate interaction. Meanwhile, CuPc on more than one monolayers of C{sub 60} on different substrates show that the substrate orientation effect quickly vanished. Our study elucidates intriguing molecular interactions that manipulate molecular orientation and donor-acceptor energy level alignment.
Authors:
;  [1] ;  [2] ; ;  [3] ;  [4] ;  [1] ;  [5]
  1. Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627 (United States)
  2. Institute for Super-microstructure and Ultrafast Process in Advanced Materials (ISUPAM), Central South University, Changsha, Hunan 410083 (China)
  3. School of Physics and Electronics, Central South University, Changsha, Hunan 410083 (China)
  4. Instrumental Analysis Center, Sun Yat-Sen University, Guangzhou 510275 (China)
  5. (ISUPAM), Central South University, Changsha, Hunan 410083 (China)
Publication Date:
OSTI Identifier:
22398766
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 12; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALIGNMENT; COPPER COMPLEXES; COPPER COMPOUNDS; ELECTRONIC STRUCTURE; ENERGY LEVELS; FULLERENES; GRAPHITE; INTERFACES; LAYERS; PHOTOELECTRON SPECTROSCOPY; PHTHALOCYANINES; SILICA; SILICON OXIDES; SUBSTRATES; THIN FILMS; ULTRAVIOLET RADIATION