Ab initio electronic structure calculations of solid, solution-processed metallotetrabenzoporphyrins

Details Ab initio electronic structure calculations of solid, solution-processed metallotetrabenzoporphyrins Ab initio electronic structure calculations of solid, solution-processed metallotetrabenzoporphyrins

2011-05-11

arxiv.org/abs/1105.2251v2

Physics

Condensed Matter

Materials Science

7 pages, 3 figures, 4 tables

Scientific paper

An ab initio study of the electronic structures of solid metallotetrabenzoporphyrins (MTBPs) utilized in organic transistors and photovoltaics is presented. Bandstructures, densities of states, and orbitals are calculated for H2, Cu, Ni, and Zn core substitutions of the unit cell of solid TBP, as deposited via soluble precursors that are thermally annealed to produce polycrystalline, semiconducting thin-films. While the unit cells of the studied MTBPs are nearly isomorphous, substitution of the core atoms alters the structure of the bands around the energy bandgap and the composition of the densities of states. Cu and Ni core substitutions introduce nearly-dispersionless energy bands near the valence and conduction band edges, respectively, that form acceptor or deep generation/recombination states.

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