Hostname: page-component-745bb68f8f-hvd4g Total loading time: 0 Render date: 2025-02-09T22:07:39.574Z Has data issue: false hasContentIssue false
  • English
  • Français

Effects of Humidity and Heat on the Conductivity of Poly(3-Alkylthiophenes)

Published online by Cambridge University Press:  25 February 2011

E. Punkka ,
H. Isotalo ,
M. Ahlskog  and
H. Stubb
E. Punkka
Affiliation:
Technical Research Centre of Finland, Semiconductor Laboratory, Otakaari 7B, 02150 Espoo, Finland.
H. Isotalo
Affiliation:
Technical Research Centre of Finland, Semiconductor Laboratory, Otakaari 7B, 02150 Espoo, Finland.
M. Ahlskog
Affiliation:
Technical Research Centre of Finland, Semiconductor Laboratory, Otakaari 7B, 02150 Espoo, Finland.
H. Stubb
Affiliation:
Technical Research Centre of Finland, Semiconductor Laboratory, Otakaari 7B, 02150 Espoo, Finland.
Get access

Abstract

The stability of the conductivity of poly(3-alkylthiophenes) has been studied in controlled environmental conditions. High humidity levels at elevated temperatures have been found to strongly influence the dedoping process. Highly FeCl3-doped samples lose their conductivity faster than lightly doped or undoped polymers. The conductivity of undoped poly(3-octylthiophene), however, initially increased by nearly two orders of magnitude as the relative humidity level was raised from 50% to 95% at 70 °C. The largest conductivity decay induced by humidity and heat was observed in thin samples. Measurements of the field-effect mobility reveal that the humidity-induced drop of the conductivity is caused by a decreasing number of active dopants, whereas heating the sample additionally results in a deterioration of the charge carrier mobility.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 247: Symposium N – Electrical, Optical, and Magnetic Properties of Organic Solid State Materials , 1992 , 753
Copyright
Copyright © Materials Research Society 1992

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. Wang, Y. and Rubner, M. F., Synth. Met. 39 153 (1990)Google Scholar
2. Gustafsson, G., Inganäs, O., Nilsson, J. O., and Liedberg, B., Synth. Met. 26, 297 (1988)Google Scholar
3. Loponen, M. T., Taka, T., Laakso, J., Väkiparta, K., Suuronen, K., Valkeinen, P., and Österholm, J.-E., Synth. Met. 41, 479 (1991)Google Scholar
4. Laakso, J., Österholm, J.-E., Nyholm, P., Stubb, H., and Punkka, E., Synth. Met. 37, 145(1990)Google Scholar
5. Paloheimo, J., Punkka, E., Stubb, H., and Kuivalainen, P., in Lower Dimensional Systems and Molecular Electronics, edited by Metzger, R. M. et al. (Plenum Press, New York, 1991)Google Scholar
6. Punkka, E., Laakso, J., Stubb, H., and Kuivalainen, P., Synth. Met. 41, 983 (1991)Google Scholar
7. Gustafsson, G., Sundberg, M., Inganäs, O., and Svensson, C., J. Molec. Electronics 6, 105 (1990)Google Scholar
8. Punkka, E. and Rubner, M. F., Synth. Met. 42, 1509 (1991); Thin Solid Films (to be published)Google Scholar