ORGANIC SEMICONDUCTOR JUNCTIONS.
Final rept. Feb 65-Feb 68,
GENERAL DYNAMICS/POMONA CALIF POMONA DIV
Pagination or Media Count:
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
- Solid State Physics