Hostname: page-component-7c8c6479df-ws8qp Total loading time: 0 Render date: 2024-03-29T09:54:31.787Z Has data issue: false hasContentIssue false

Sensitizer Effects on the Transport Properties of Polymer:Sensitizer Organic Blend

Published online by Cambridge University Press:  21 March 2013

Karina Aleman
Affiliation:
National Institute for Astrophysics, Optics and Electronics, AP 51 y 216, Puebla, 72000, Mexico
Svetlana Mansurova
Affiliation:
National Institute for Astrophysics, Optics and Electronics, AP 51 y 216, Puebla, 72000, Mexico
Andrey Kosarev
Affiliation:
National Institute for Astrophysics, Optics and Electronics, AP 51 y 216, Puebla, 72000, Mexico
Ponciano Rodriguez
Affiliation:
National Institute for Astrophysics, Optics and Electronics, AP 51 y 216, Puebla, 72000, Mexico
Klaus Meerholz
Affiliation:
University of Cologne, Insitute of Physical Chemistry, Luxemburger Str. 116, Cologne, D-50939, Germany
Sebastian Koeber
Affiliation:
University of Cologne, Insitute of Physical Chemistry, Luxemburger Str. 116, Cologne, D-50939, Germany
Get access

Abstract

In this work we studied the effect of sensitizer concentration on a mobility-lifetime product μτ, on photoconductivity response time ph τph, and on drift mobility μ of the majority carriers in an organic polymer:sensitizer blend. The intensity modulated photocurrent and photo-EMF technique were used as experimental tools for this purpose. The studied material consists of a mixture of the novel non-conjugated main chain hole-transporting polymer PFO6:PDA (Poly(N,N'-bis(4-hexyloxyphenyl)-N'-(4-(9-phenyl-9H-fluoren-9-yl)phenyl)phenylen-1,4- diamine) sensitized with the highly soluble C60 derivative PCBM (phenyl-C61-butyric acid methyl ester) in the range from Z = 1 to 40 wt.-%. It was experimentally observed that (1) at the increasing sensitizer concentration the overall photoconductivity increases; (2) the majority carrier type switches from holes to electrons at approximately 2:1 polymer:sensitizer ratio; (3) the holes response time becomes shorter at the decreasing polymer fraction, while the electrons lifetime is only slightly dependent on sensitizer concentration; (4) the hole mobility-lifetime product decreases at the decreasing concentration of hole transporting component (polymer), while the electrons mobility-lifetime product increases at the increasing concentration of the electron transporting component (sensitizer); (5) the same is true for the carriers mobilities.

Type
Research Article
Copyright
Copyright © Materials Research Society 2010

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. Green, R., Marfa, A., Ferguson, A. J., Kopidakis, N., Rumbles, G., and Shaheen, S. E., Appl. Phys. Lett. 92, 033301 (2008).Google Scholar
2. Deibel, C., Wagenpfahl, A., and Dyakonov, V., Phys. Stat. Sol. (RRL) 2, 175 (2008).Google Scholar
3. Pivrikas, A., Sariciftci, N. S., Jûska, G., and Österbacka, R. Prog. Photovolt: Res. Appl., 15 (2007)].Google Scholar
4. Tuladhar, S. M., Poplavskyy, D., Choulis, S. A., Durrant, J. R., Bradley, D. D. C., and Nelson, J., Adv. Funct. Mater. 15, 1171 (2005).Google Scholar
5. von Hauff, E., Parisi, J., and Dyakonov, V., J. Appl. Phys. 100 043702 (2006)Google Scholar
6. Huang, J., Li, G., and Yang, Y., Appl. Phys. Lett. 87, 112105 (2005).]Google Scholar
7. Baumann, A., Lorrmann, J., Deibel, C., Dyakonov, V., Applied Physics Letters, 93, 252104, 2008]Google Scholar
8. Dennler, G., Mozer, A. J., Jûska, G., Pivrikas, A., Österbacka, R., Fuchsbauer, D. A., and Sariciftci, N. S., Organic Electronics, 7, 229 (2006)Google Scholar
9. Schelter, J., Mielke, G. F., Köhnen, A., Wies, J., Köber, S., Nuyken, O., Meerholz, K. Google Scholar
10. Stepanov, S., Photo-Electromotive-Force Effect in Semiconductors in Handbook on Advanced Electronics and Photonics Materials, edited by Nalwa, H. S., (Academic, San Diego 2001).Google Scholar
11. Gill, W. D., J. Appl. Phys. 43, 5033 (1972).Google Scholar
12. Baranovski, S. D. and Rubel, O., Charge transport in amorphous semiconductors. In: Charge Transport in Amorphous Solids with Application in Electronics, Baranovski, S. D. (ed.) John Willey & Sons, Ltd., Chichester, (2006)Google Scholar