A Study of the Electronic Properties of Organic Semiconductors

Abstract

The conduction mechanism of the crystals of tetracyanoquinodimethan (TCNQ) anion radical salts is studied. Unpaired π-electrons in TCNQ⁻ anions are described by the Hubbard model with a narrow band and one electron per molecular site. The electronic spectra of the Hubbard model are determined by the Hubbard’s third solution. The value of the electrical conductivity of TEA(TCNQ)₂ at 23°C agrees with experimental values quantitatively.