Electronic memory effects in zinc oxide nanoparticle -polystyrene devices with a calcium top electrode

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Diodes with an active layer of solution processed zinc oxide (ZnO) nanoparticles and polystyrene are studied. Poly(3,4-ethylenedioxythiophene)- polystyrenesulfonate (PEDOT:PSS) on indium doped tin oxide (ITO) is used as the bottom electrode and aluminum or calcium are used as top electrode. Pristine devices show diode behavior in their current-voltage characteristics. The conductivity of the device in reverse bias can be raised three orders of magnitude by applying a positive voltage or by illumination with UV light. In this high conductivity state we observe reversible electronic memory effects. The electronic memory effects are attributed to a reversible electrochemical process at the PEDOT:PSS/ZnO interface. Memory effects in diodes with Al and Ca metal electrode are found to be very similar, consistent with the view that the memory effects arise at the PEDOT:PSS/ZnO interface.

Original languageEnglish
Title of host publicationOrganic Electronics
Subtitle of host publicationMaterials, Devices and Applications
PublisherMaterials Research Society
Number of pages6
ISBN (Print)9781604234176
Publication statusPublished - 1 Dec 2006
Event2006 Materials Research Society Fall Meeting - Boston, MA, United States
Duration: 27 Nov 20061 Dec 2006

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


Conference2006 Materials Research Society Fall Meeting
Country/TerritoryUnited States
CityBoston, MA


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