Accession Number:

AD0256031

Title:

ORGANIC SEMICONDUCTORS. I. THE PHTHALOCYANINES

Descriptive Note:

Corporate Author:

LOCKHEED MISSILES AND SPACE CO SUNNYVALE CALIF

Personal Author(s):

Report Date:

1961-03-01

Pagination or Media Count:

1.0

Abstract:

The chemistry and semiconducting properties of the phthalocyanines and the phthalocyanine polymers are reviewed. A brief intoduction to the conduction mechanism occurring in organic semiconductors is given and the applications of this mechanism to the phthalocyanines are discussed. Experimental techniques for the measurement of the phthalocyanine conductivities have appreciably improved. The sample intercrystalline resistances have been reduced to a consistent minimum through the use of compacted specimens. Reproducible and consistent data have now been obtained which narrow the range of values to between 1.5 and 1.7 ev for the energy gap of the metal-free and the metal phthalocyanines. Advances in the chemistry of the polymeric phthalocyanines have been limited. Progress in this area has been impeded by the difficulties encountered in purification, analysis, and the determination of the degree of polymerization. Correlations of the energy gap size to the degree of polymerization of the phthalocyanines are, at best, approximations because of sample composition uncertainties. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE