Optical and Electrical Properties of Modified Polythiophene with Tetrafluorobenzene Thin Film

Article Preview

Abstract:

Modified poly(3-hexylthiophene) (P3HT) with molecule of 1,4-dithienyl-2,3,5,6-tetrafluorobenzene in the main chain was developed as a new class of conjugated polymer with high stability. The structural and optical characteristics of modified polymer were investigated by x-ray diffraction (XRD) and optical absorption spectroscopy. By comparing to characteristic of P3HT, the XRD pattern of modified polymer showed the diffraction peak shifted from theta of 5.4o to 5.9o with decrease intensity. This indicates that the modified polymer chain has a reducing in structural coplanarity and crystallinity. Since the electrical property can be related to the morphology and structure of thin film, the electrical conduction of modified polymer was studied with the structure of ITO/modified P3HT/Al. The result of I-V characteristic measurement of modified polymer as a function of temperatures showed that the conductance decreased with decreasing temperature. The mobility of copolymer was also evaluated by using time of flight measurement and mobility value of 5x10-4 cm2/Vs was obtained at room temperature.

You might also be interested in these eBooks

Info:

Periodical:

Advanced Materials Research (Volumes 93-94)

Pages:

574-577

Citation:

Online since:

January 2010

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2010 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] Y. Xu and P.R. Berger: J. Appl. Phys. Vol. 95 (2004), p.1497.

Google Scholar

[2] B.R. Saunders and M.L. Turner: Adv. Coll. Int. Sci. Vol. 138 (2008), p.1.

Google Scholar

[3] M. Ramuz, L. Bergi, C. Winnewisster and P. Seitz: Org. Elec. Vol. 9 (2008), p.369.

Google Scholar

[4] H. Sirringhaus, N. Tessler and R.H. Friend: Science. Vol. 280 (1998), p.1741.

Google Scholar

[5] M. Reyes-Reyes, K. Kim, and D.L. Carroll: Appl. Phys. Lett. Vol. 87 (2005), 083506.

Google Scholar

[6] D. Sainova, S. Janietz, U. Asawapirom, L. Romaner, E. Zojer, N. Koch, and Antje Vollmer: Chem. Mater. Vol. 19 (2007), p.1472.

DOI: 10.1021/cm061571e

Google Scholar

[7] T. Komino, H. Tajima and M. Matsuda: Chem. Lett. Vol. 37 (2008), p.690 (a) 0 10 20 30 40 50 101 102 Time (µs) Current in log scale (µA) P3HT P3HTTFT 2 4 6 8 10 10-1 100 101 102 103 1000/T (K-1) Current (nA) P3HT P3HTTFT (b).

Google Scholar