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High Temperature Electrical Conductivity Of Solution-Cast Bbl Flims.

Published online by Cambridge University Press:  16 February 2011

Ashwini K. Agrawal ,
Chyi-Shan Wang  and
Hyun H. Song
Ashwini K. Agrawal
Affiliation:
Systran Corporation, 4126 Linden avenue, Dayton, OH 45432
Chyi-Shan Wang
Affiliation:
University of Dayton Research Institute, 300 College Park Drive, Dayton, OH 45469
Hyun H. Song
Affiliation:
University of Dayton Research Institute, 300 College Park Drive, Dayton, OH 45469
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Abstract

Thin films (18 μ thickness) of ladder polymer poly[(7-oxo-7H,10H-benz (d,e) imidazo (4′,5′:5,6) -benzimidazo (2,l-a) isoquinoline-3,4:10,ll-tetrayl)-10-carbonyl} (BBL), which were cast from an isotropie methanesulfonic acid solution of BBL, were characterized for electrical conductivity in the temperature range of 25–480 °C. The electrical conductivity was Measured in situ while the films were heated at a rate of 2 °C/Minute under vacuum. The in-plane conductivity of BBL films increased rapidly from below 10−10 S/cm at the room temperature to 5 × 10-3 S/cm at 280 °C and then increased slowly to a peak value of 5 × 10-2 S/cm at about 460 °C. The out-of-plane conductivity of the films was comparable to their in plane conductivity at temperatures below 270 °C, however, was lower by a factor of 10 than in-plane conductivity at temperatures above 270 °C. This anisotropy in conductivity of BBL films is discussed with respect to the film morphology determined by wide angle x-ray scattering studies.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 328: Symposium Q – Electrical, Optical, and Magnetic Properties of Organic Solid State Materials , 1993 , 279
Copyright
Copyright © Materials Research Society 1994

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References

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