Electrically permanent memory characteristics of an ionic conjugated polymer
SCIE
SCOPUS
- Title
- Electrically permanent memory characteristics of an ionic conjugated polymer
- Authors
- Yong-Gi Ko; Wonsang Kwon; Dong Min Kim; Kyungtae Kim; Yeong-Soon Gal; Ree, M
- Date Issued
- 2012-08
- Publisher
- Royal Society of Chemistry
- Abstract
- In this work, an ionic conjugated polymer with propargyl side groups (poly(2-ethynylpyridinum bromide); PEP-P) was synthesized. High-quality thin films with smooth surfaces were prepared from this polymer on silicon substrates and metal electrodes, via a conventional, simple solution-coating and drying process. Synchrotron X-ray scattering analysis showed that the polymer in the nanoscale thin films was amorphous, but was somewhat preferentially oriented in the film plane, rather than randomly oriented. Using synchrotron X-ray reflectivity analysis, the electron densities and interfaces between the polymer film layers and the silicon substrate and metal electrodes were examined in detail. To our knowledge, PEP-P is the first ionic conjugated polymer to be shown to exhibit electrically nonvolatile memory behavior. The polymer in the nanoscale thin films showed excellent write-once-read-many-times (WORM) memory characteristics, without any polarity. The switching-ON voltage was lower than 1.5 V. WORM memory devices based on PEP-P were highly stable, even under ambient air conditions. PEP-P therefore has great potential as a candidate material for the low-cost mass production of high-performance, programmable unipolar WORM memory devices with very low power consumption.
- Keywords
- X-RAY-SCATTERING; ORGANOSILICATE DIELECTRIC FILMS; NANOSCALE THIN-FILMS; SWITCHING CHARACTERISTICS; SEMICONDUCTING POLYMER; POLYACETYLENE; REFLECTIVITY; PERFORMANCE; DERIVATIVES
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/16228
- DOI
- 10.1039/C2PY20129A
- ISSN
- 1759-9954
- Article Type
- Article
- Citation
- POLYMER CHEMISTRY, vol. 3, no. 8, page. 2028 - 2033, 2012-08
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