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

Journal Article · Mon Apr 21 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4873347· OSTI ID:22262560

Ligorio, Giovanni; Christodoulou, Christos ^[1]; Florea, Ileana; Ersen, Ovidiu ^[2]; Monteiro, Nicolas-Crespo; Brinkmann, Martin ^[3]; Koch, Norbert ^[1]

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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)

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.

• OSTI ID: 22262560
• Journal Information: Applied Physics Letters, Vol. 104, Issue 16; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BINDING ENERGY
EXCITONS
GOLD
NANOSTRUCTURES
ORGANIC SEMICONDUCTORS
PARTICLES
PHOTOELECTRON SPECTROSCOPY