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Hall Effect and Magnetoresistance in Undoped Poly(3 Hexylthiophene)

Authors :
Christer Svensson
A. Assadi
Magnus Willander
Source :
MRS Proceedings. 173
Publication Year :
1989
Publisher :
Springer Science and Business Media LLC, 1989.

Abstract

We report studies of transport properties of thin films of undoped poly(3-hexylthiophene) (P3HT) fabricated by spinning a polymer solution onto oxidised silicon or glass. The film thicknesseswere on the order of 1000 Å. We studied magnetoresistance, the effect of magnetic field on field effect mobility and Hall effect.Transverse magnetoresistance was measured on films on glass. A positive anomalous magnetoresistance with a saturation value of about 0.1 % was found. Transverse magnetoresistance was also studied by measuring the change of a field effect mobility with magnetic field. This measurement was performed using the field effect transistor structure. An initial mobility of 6.5 × 10−5 cm2/Vs was reduced by about 15 % in a transverse magnetic field.We also carried out Hall effect measurements on films on glass using a Van der Pauw contact configuration. The measured Hall mobility was 2.17 × 10−5 cm2/Vs. Finally we measured the temperature dependence of the Hall mobility and found it follow the exp(T-l/4) law of variable range hopping.

Details

ISSN :
19464274 and 02729172
Volume :
173
Database :
OpenAIRE
Journal :
MRS Proceedings
Accession number :
edsair.doi...........4ae9b4a4af03b0cca0908cfc9a70041f
Full Text :
https://doi.org/10.1557/proc-173-403