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Title: Charging and exciton-mediated decharging of metal nanoparticles in organic semiconductor matrices

Gold nanoparticles (Au-NPs) were deposited on the surface of n- and p-type organic semiconductors to form defined model systems for charge storage based electrically addressable memory elements. We used ultraviolet photoelectron spectroscopy to study the electronic properties and found that the Au-NPs become positively charged because of photoelectron emission, evidenced by spectral shifts to higher binding energy. Upon illumination with light that can be absorbed by the organic semiconductors, dynamic charge neutrality of the Au-NPs could be re-established through electron transfer from excitons. The light-controlled charge state of the Au-NPs could add optical addressability to memory elements.
Authors:
; ;  [1] ; ;  [2] ; ;  [3] ;  [1] ;  [4]
  1. Institut für Physik, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 6, 12489 Berlin (Germany)
  2. IPCMS, rue du loess 23, 67034 Strasbourg (France)
  3. Institut Charles Sadron CNRS, rue du loess 22, 67034 Strasbourg (France)
  4. (Germany)
Publication Date:
OSTI Identifier:
22262560
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 16; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BINDING ENERGY; EXCITONS; GOLD; NANOSTRUCTURES; ORGANIC SEMICONDUCTORS; PARTICLES; PHOTOELECTRON SPECTROSCOPY