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Title: Substrate effect on the electronic structures of CuPc/graphene interfaces

Abstract

The interfacial electronic structures of copper phthalocyanine (CuPc) deposited on a single-layer graphene (SLG) film prepared on Cu and SiO{sub 2} substrates (SLG/Cu and SLG/SiO{sub 2}) were investigated using ultraviolet photoelectron spectroscopy. The ionization energy of CuPc on SLG/Cu and SLG/SiO{sub 2} substrate is, respectively, 5.62 eV and 4.97 eV. The energy level alignments at the two interfaces were estimated. The results revealed that the height of the electron (hole) injection barriers are 1.20 (1.10) and 1.38 (0.92) eV at CuPc/SLG/Cu and CuPc/SLG/SiO{sub 2} interfaces, respectively.

Authors:
; ; ;  [1]
  1. Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong (Hong Kong)
Publication Date:
OSTI Identifier:
22025520
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 100; Journal Issue: 16; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; CHEMICAL VAPOR DEPOSITION; COPPER; COPPER COMPOUNDS; CRYSTAL GROWTH; ELECTRONIC STRUCTURE; ENERGY LEVELS; EV RANGE; HOLES; INTERFACES; LAYERS; ORGANIC SEMICONDUCTORS; PHTHALOCYANINES; SILICON OXIDES; SUBSTRATES; SURFACE IONIZATION; THIN FILMS; ULTRAVIOLET RADIATION; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats

Qihui, Wu, Guo, Hong, Ng, T W, and Lee, S T. Substrate effect on the electronic structures of CuPc/graphene interfaces. United States: N. p., 2012. Web. doi:10.1063/1.3703766.
Qihui, Wu, Guo, Hong, Ng, T W, & Lee, S T. Substrate effect on the electronic structures of CuPc/graphene interfaces. United States. doi:10.1063/1.3703766.
Qihui, Wu, Guo, Hong, Ng, T W, and Lee, S T. Mon . "Substrate effect on the electronic structures of CuPc/graphene interfaces". United States. doi:10.1063/1.3703766.
@article{osti_22025520,
title = {Substrate effect on the electronic structures of CuPc/graphene interfaces},
author = {Qihui, Wu and Guo, Hong and Ng, T W and Lee, S T},
abstractNote = {The interfacial electronic structures of copper phthalocyanine (CuPc) deposited on a single-layer graphene (SLG) film prepared on Cu and SiO{sub 2} substrates (SLG/Cu and SLG/SiO{sub 2}) were investigated using ultraviolet photoelectron spectroscopy. The ionization energy of CuPc on SLG/Cu and SLG/SiO{sub 2} substrate is, respectively, 5.62 eV and 4.97 eV. The energy level alignments at the two interfaces were estimated. The results revealed that the height of the electron (hole) injection barriers are 1.20 (1.10) and 1.38 (0.92) eV at CuPc/SLG/Cu and CuPc/SLG/SiO{sub 2} interfaces, respectively.},
doi = {10.1063/1.3703766},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 16,
volume = 100,
place = {United States},
year = {2012},
month = {4}
}