Electronic Structure of Copper Phthalocyanine: a Comparative Density Functional Theory Study

Details Electronic Structure of Copper Phthalocyanine: a Comparative Density Functional Theory Study Electronic Structure of Copper Phthalocyanine: a Comparative Density Functional Theory Study

2008-01-04

arxiv.org/abs/0801.0733v1

Physics

Condensed Matter

Materials Science

18 pages, 4 Figure, 1 Table

Scientific paper

10.1063/1.2898540

We present a systematic density functional theory study of the electronic structure of copper phthalocyanine (CuPc), using several different (semi)-local and hybrid functionals, and compare the results to experimental photoemission data. We show that semi-local functionals fail qualitatively for CuPc, primarily because of under-binding of localized orbitals due to self-interaction errors. We discuss an appropriate choice of functional for studies of CuPc/metal interfaces and suggest the Heyd-Scuseria-Ernzerhof screened hybrid functional as a suitable compromise functional.

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