Hostname: page-component-586b7cd67f-dsjbd Total loading time: 0 Render date: 2024-11-29T08:54:42.174Z Has data issue: false hasContentIssue false
  • English
  • Français

Molecular Conformation-dependent Memory Effects in Non-conjugated Polymers with Pendant Carbazole Moieties

Published online by Cambridge University Press:  01 February 2011

Siew Lay Lim ,
Qidan Ling ,
Eric Yeow Hwee Teo ,
Chun Xiang Zhu ,
Daniel Siu Hung Chan ,
En Tang Kang  and
Koon Gee Neoh
Siew Lay Lim
Affiliation:
[email protected], National University of Singapore, NUS Graduate School of Integrative Sciences and Engineering (NGS), Centre for Life Sciences (CeLS), #05-01, 28 Medical Drive, Singapore, 117456, Singapore
Qidan Ling
Affiliation:
[email protected], National University of Singapore, Department of Chemical and Biomolecular Engineering, Singapore, N/A, Singapore
Eric Yeow Hwee Teo
Affiliation:
[email protected], National University of Singapore, SNDL, Department of Electrical and Computer Engineering, Singapore, N/A, Singapore
Chun Xiang Zhu
Affiliation:
[email protected], National University of Singapore, SNDL, Department of Electrical and Computer Engineering, Singapore, N/A, Singapore
Daniel Siu Hung Chan
Affiliation:
[email protected], National University of Singapore, SNDL, Department of Electrical and Computer Engineering, Singapore, N/A, Singapore
En Tang Kang
Affiliation:
[email protected], National University of Singapore, Department of Chemical and Biomolecular Engineering, Singapore, N/A, Singapore
Koon Gee Neoh
Affiliation:
[email protected], National University of Singapore, Department of Chemical and Biomolecular Engineering, Singapore, N/A, Singapore
Get access

Abstract

Single-layer devices of the structure indium-tin-oxide/polymer/aluminum were fabricated from two non-conjugated polymers with pendant carbazole groups in different spacer units. The device based on poly(2-(N-carbazolyl)ethyl methacrylate) (PMCz) exhibited non-volatile write-once-read-many-times (WORM) memory behavior with an ON/OFF current ratio up to 106, while the device based on poly(9-(2-((4-vinylbenzyl)oxy)ethyl)-9H-carbazole) (PVBCz) exhibited volatile memory behavior with an ON/OFF current ratio of approximately 103. In the absence of a spacer unit between the pendant carbazole group and the main chain, regioregular poly(N-vinylcarbazole) (PVK) exhibited only one conductivity state (ON state). The switching and memory effects observed were attributed to conformation changes of the pendant carbazole groups.

Keywords

polymermemorydevices
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1071: Symposium F – Materials Science and Technology for Nonvolatile Memories , 2008 , 1071-F05-01
Copyright
Copyright © Materials Research Society 2008

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Forrest, S. R. Nature 428, 911 (2004).Google Scholar
2. Ling, Q. D. Liaw, D. J. Teo, E. Y. H. Zhu, C. X. Chan, D. S. H. Kang, E. T. and Neoh, K. G. Polymer 48, 5182 (2007).Google Scholar
3. Stikeman, A. Technol. Rev. 105, 31 (2002).Google Scholar
4. Bandyopadhyay, A. and Pal, A. J. Chem. Phys. Lett. 371, 86 (2003).Google Scholar
5. Ouyang, J. Chu, C. W. Szmanda, C. R. Ma, L. and Yang, Y. Nat. Mater. 3, 918 (2004).Google Scholar
6. Patil, S. Lai, Q. X. Marchioni, F. Jung, M. Y. Zhu, Z. H. Chen, Y. Wudl, F. J. Mater. Chem. 16, 4160 (2006).Google Scholar
7. Teo, E. Y. H. Ling, Q. D. Song, Y. Tan, Y. P. Wang, W. Kang, E. T. Chan, D. S. H. Zhu, C.X., Org. Electron. 7, 173 (2006).Google Scholar
8. Lim, S. L. Ling, Q. D. Teo, E. Y. H. Zhu, C. X. Chan, D. S. H. Kang, E. T. and Neoh, K. G. Chem. Mater. 19, 5148 (2007).Google Scholar
9. Vandendriessche, J. Palmans, P. Topet, S. Boens, N. Schryver, F. C. De, Masuhara, H. J. Am. Chem. Soc. 106, 8057 (1994).Google Scholar
10. Chen, Y. W. Zhang, B. Wang, F. Opt. Commun. 228, 341 (2003).Google Scholar
11. Davidson, K. Soutar, I. Swanson, L. Yin, J. J. Polym. Sci. Pol. Phys. 35, 963 (1997).Google Scholar