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SPACE-CHARGE EFFECTS IN VACUUM DEPOSITED POLYIMIDE LAYERS

I. Zhivkov1,* , V. Strijkova1, E. Spassova1, G. Danev1, S. Nešpurek2, M. Iwamoto3

Affiliation

  1. Central Laboratory of Photoprocesses, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl. 109, 1113 Sofia, Bulgaria
  2. Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovský Sq. 2, 162 06 Prague 6, Czech Republic
  3. Department of Physical Electronics, Tokyo Institute of Technology, 2-12-1-S3-33 O-okayama, Meguro-ku, Tokyo 152-8552, Japan

Abstract

Polyimide (PI) thin films were deposited by simultaneous vacuum co-evaporation of pyromellitic dianhydride and oxydianiline monomers, in the ratio 48:52 weight %. The post deposition thermal treatment made the degree of imidization higher than 40%. Temperature modulated space-charge-limited current (TM-SCLC) spectroscopy was used to characterize Au|PI|Al sandwich samples. The resulting density-of-states (DOS) function could be described by an exponential energy dependence with a characteristic temperature of 2244 K..

Keywords

Polyimide, Electrical conductivity, Space-charge spectroscopy.

Submitted at: Dec. 9, 2004
Accepted at: Jan. 26, 2005

Citation

I. Zhivkov, V. Strijkova, E. Spassova, G. Danev, S. Nešpurek, M. Iwamoto, SPACE-CHARGE EFFECTS IN VACUUM DEPOSITED POLYIMIDE LAYERS, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 1, pp. 245-248 (2005)