Accession Number:

AD0679601

Title:

ORGANIC SEMICONDUCTOR JUNCTIONS.

Descriptive Note:

Final rept. Feb 65-Feb 68,

Corporate Author:

GENERAL DYNAMICS/POMONA CALIF POMONA DIV

Personal Author(s):

• Krikorian,Esther

Report Date:

1968-06-01

Pagination or Media Count:

283.0

Abstract:

Three phases of work are discussed 1 Screening of a large number of organic systems relative to conductivity and carrier type. Selection criteria were low resistivity less than 10,000 ohm-cm and amenability to changing of majority carrier type by additive control doping 2 Detailed study of additive effects on selected organic semiconductor hosts 3 Formation of organic p-n junctions - the final objective of this work. The screening phase led to selection of charge transfer complex systems as principal materials of study in phases 2 and 3. Specifically, tetrathiothetracene-orthochloranil, perylene-bromine, magnesium-phthalocyanine and tetracyanoquinodimethane salt systems were studied with various metal and organic additives as dopants. Limited studies were also performed with polymers. Materials with resistivities as low as 0.1 ohm-cm were prepared. Additive control produced large variations of n- and p-type characteristics in a single host system. Results of the second phase of the work led to successful preparation of p-n junction diodes by thermal diffusion of additives. Rectification ratios of up to 200 were achieved. Author

Descriptors:

• ORGANIC COMPOUNDS
• DOPING
• CHARGE CARRIERS
• CONDUCTIVITY
• TRANSISTORS
• SEEBECK EFFECT
• CYANIDES
• AMINES
• BROMINE
• POLYMERS

Subject Categories:

• Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE