Electronic states in one-dimensional polymeric superlattices: A tight-binding approach

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Abstract
We present a model calculation, using the tight-binding approach, of a one-dimensional organic superlattice consisting of regular alternation of low- and high-gap segments of conjugated polymers. The electronic band structure is investigated as a function of the polymer composition and the length of the potential well. We show that, depending on the well-barrier alternation sequence, the electronic properties of this one-dimensional heterostructure span from those of a copolymer possessing an overall new electronic structure, to a situation where confinement occurs and superlattice effects are detected. DOI: http://dx.doi.org/10.1103/PhysRevB.51.1624 © 1995 The American Physical Society