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Title: Anomalous photoelectric emission from Ag on zinc-phthalocyanine film

Abstract

Photoelectric emission from organic and metal thin films is generally observed with irradiation of photon energy larger than 4 eV. In this paper, however, we report photoelectric emission from Ag on a zinc-phthalocyanine (ZnPc) layer at a photon energy of 3.4 eV. The threshold energy for this photoelectric emission is much smaller than the work function of Ag estimated by conventional photoelectron spectroscopy. The photoelectric emission by low-energy photons is significant for Ag thicknesses of less than 1 nm. Photoelectron spectroscopy and morphological study of the Ag/ZnPc suggest that the anomalous photoelectric emission from the Ag surface is caused by a vacuum level shift at the Ag/ZnPc interface and by surface plasmons of the Ag nanoparticles.

Authors:
 [1]; ; ;  [2]; ; ; ; ;  [3]
  1. Department of Electric and Electronic Engineering, Faculty of Science and Engineering, Kinki University, Higashiosaka 577-8502 (Japan)
  2. Department of Physics and Materials Science, Graduate School of Science and Engineering, Shimane University, Matsue 690-8504 (Japan)
  3. Synchrotron Light Application Center, Saga University, Saga 840-8502 (Japan)
Publication Date:
OSTI Identifier:
22273420
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 104; Journal Issue: 19; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; NANOSTRUCTURES; PHOTOELECTRIC EMISSION; PHOTOELECTRON SPECTROSCOPY; PHOTONS; PHTHALOCYANINES; PLASMONS; SURFACES; THIN FILMS; THRESHOLD ENERGY; WORK FUNCTIONS; ZINC

Citation Formats

Tanaka, Senku, Otani, Tomohiro, Fukuzawa, Ken, Hiromitsu, Ichiro, Ogawa, Koji, Azuma, Junpei, Yamamoto, Isamu, Takahashi, Kazutoshi, and Kamada, Masao. Anomalous photoelectric emission from Ag on zinc-phthalocyanine film. United States: N. p., 2014. Web. doi:10.1063/1.4876956.
Tanaka, Senku, Otani, Tomohiro, Fukuzawa, Ken, Hiromitsu, Ichiro, Ogawa, Koji, Azuma, Junpei, Yamamoto, Isamu, Takahashi, Kazutoshi, & Kamada, Masao. Anomalous photoelectric emission from Ag on zinc-phthalocyanine film. United States. https://doi.org/10.1063/1.4876956
Tanaka, Senku, Otani, Tomohiro, Fukuzawa, Ken, Hiromitsu, Ichiro, Ogawa, Koji, Azuma, Junpei, Yamamoto, Isamu, Takahashi, Kazutoshi, and Kamada, Masao. 2014. "Anomalous photoelectric emission from Ag on zinc-phthalocyanine film". United States. https://doi.org/10.1063/1.4876956.
@article{osti_22273420,
title = {Anomalous photoelectric emission from Ag on zinc-phthalocyanine film},
author = {Tanaka, Senku and Otani, Tomohiro and Fukuzawa, Ken and Hiromitsu, Ichiro and Ogawa, Koji and Azuma, Junpei and Yamamoto, Isamu and Takahashi, Kazutoshi and Kamada, Masao},
abstractNote = {Photoelectric emission from organic and metal thin films is generally observed with irradiation of photon energy larger than 4 eV. In this paper, however, we report photoelectric emission from Ag on a zinc-phthalocyanine (ZnPc) layer at a photon energy of 3.4 eV. The threshold energy for this photoelectric emission is much smaller than the work function of Ag estimated by conventional photoelectron spectroscopy. The photoelectric emission by low-energy photons is significant for Ag thicknesses of less than 1 nm. Photoelectron spectroscopy and morphological study of the Ag/ZnPc suggest that the anomalous photoelectric emission from the Ag surface is caused by a vacuum level shift at the Ag/ZnPc interface and by surface plasmons of the Ag nanoparticles.},
doi = {10.1063/1.4876956},
url = {https://www.osti.gov/biblio/22273420}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 19,
volume = 104,
place = {United States},
year = {Mon May 12 00:00:00 EDT 2014},
month = {Mon May 12 00:00:00 EDT 2014}
}