University Patents, Inc.

Chwan K Chiang

Alan G MacDiarmid

Alan J Heeger

Hideki Shirakawa

Shek-Chung Gau

Electrically conducting organic polymeric material having a preselected room temperature p-type electrical conductivity which may vary over the entire range characteristic of semiconductor behavior and into the range characteristic of metallic behavior, is prepared by controlled chemical doping of polyacetylene in the form of a polycrystalline film. Exceptionally high room temperature p-type electrical conductivity within the range of from about 0.1 to of the order of 10.sup.3 ohm.sup.-1 cm.sup.-1 is achieved with several electron acceptor dopants, including bromine, iodine, iodine chloride, iodine bromide and arsenic pentafluoride.

P-Type electrically conducting doped polyacetylene film and method of

Electrically conducting organic polymeric film material exhibiting a preselected room temperature n-type electrical conductivity ranging from that characteristic of semiconductor behavior to that characteristic of metallic behavior, is prepared by controlled electron donor doping of a polycrystalline film of polyacetylene with a metal dopant whose Pauling electronegativity value is no greater than 1.6. Preferred metal dopants are the alkali metals. The procedure may be employed in preparing polyacetylene film with a p-n junction formed by two adjacent portions of the film respectively provided wth p-type and n-type electrical conductivities.

Growing community of inventors

Upper Darby, PA, United States of America

Chwan K Chiang