Abstract
Future organic electronic and nanoelectronic applications will need
organic memories as the devices and circuits get more complex. However, until
very recently there has been limited research on the subject. Recent
discoveries allow organic bistable devices to be used for nonvolatile memory
applications [1]. We present a memory device concept that utilizes metallic
nanoparticles dispersed in an insulating matrix. The simple structure allows
one-step active layer deposition and thus paves the way for roll-to-roll
processing.
The main objective of this work is to develop memory units that can be
manufactured in a rapid and economical fashion. The printing process offers
tools for this purpose, but requires air-stable materials. Thus the use of
gold nanoparticles (Figure 1) in a polystyrene matrix is a feasible
alternative. However, other materials are also investigated.
Figure 1: Gold nanoparticle with polystyrene tails (left) and a TEM picture,
which shows that the particles are evenly distributed in the polymer matrix
(right).
Even distribution of nanoparticles is a requirement for optimal device
operation. The TEM picture in Figure 1 shows that the gold particles spread
evenly in the matrix. A resistance switching phenomenon can be observed in
this nanoscale composite when contacted in a sandwich structure. Although the
switching is still inconsistent, the negative differential resistance is
consistent, which can also be utilized in a memory device. (Figure 2)
Figure 2: I-V characteristics of a Au-particle memory device.
1. Himadri S. Majumdar, Jayanta K. Baral, Ronald Österbacka, Olli Ikkala, and
Henrik Stubb, Fullerene-based bistable devices and associated
negative-differential-resistance effect, Organic Electronics 6 (2005) 188-192.
Original language | English |
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Publication status | Published - 2007 |
MoE publication type | Not Eligible |
Event | 9th European Conference on Molecular Electronics, ECME 2007 - Metz, France Duration: 5 Sep 2007 → 8 Sep 2007 |
Conference
Conference | 9th European Conference on Molecular Electronics, ECME 2007 |
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Abbreviated title | ECME 2007 |
Country | France |
City | Metz |
Period | 5/09/07 → 8/09/07 |