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All-inorganic Light Emitting Devices Based on Semiconducting Nanoparticles

Published online by Cambridge University Press:  01 February 2011

Ekaterina Neshataeva,
Tilmar Kümmell,
André Ebbers and
Gerd Bacher
Ekaterina Neshataeva
Affiliation:
ekaterina.neshataeva@uni-due.de, University Duisburg-Essen, Werkstoffe der Elektrotechnik, Duisburg, Germany
Tilmar Kümmell
Affiliation:
tilmar.kuemmel@uni-due.de, University Duisburg-Essen, Werkstoffe der Elektrotechnik, Duisburg, NRW, Germany
André Ebbers
Affiliation:
andre.ebbers@evonik.com, Evonik-Degussa GmbH, Creavis, Marl, Germany
Gerd Bacher
Affiliation:
gerd.bacher@uni-due.de, University Duisburg-Essen, Werkstoffe der Elektrotechnik, Duisburg, NRW, Germany
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Abstract

We demonstrate light emitting devices based on ZnO nanoparticles and realized without any additional organic support layers. Pure ZnO devices showed electroluminescence in the visible and the UV spectral range at voltages below 10 V. In order to facilitate hole injection and to stabilize device operation, additional p-type inorganic support layers were introduced. Sputtered NiO layers are shown to improve the stability of the device and its I/V behavior. First bilayer devices consisting of a layer sequence of p-doped Si and naturally n-doped ZnO nanoparticles revealed promising electro-luminescence results with a high contribution in the UV spectral range at reduced current densities.

Keywords

luminescencenanoscaleoxide

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