Electronic properties of the charge transfer material MnPc/F4TCNQ.

Autor: Rückerl, Florian, Mahns, Benjamin, Dodbiba, Eni, Nikolis, Vasileios, Herzig, Melanie, Büchner, Bernd, Knupfer, Martin, Hahn, Torsten, Kortus, Jens
Předmět:
Zdroj: Journal of Chemical Physics; 2016, Vol. 145 Issue 11, p1-7, 7p, 2 Diagrams, 6 Graphs
Abstrakt: We present electronic properties of a charge transfer material consisting of Manganese(II)Phthalocyanine (MnPc) and 2,3,5,6-Tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ), investigated by means of photoemission spectroscopy and electron energy-loss spectroscopy, as well as supporting density functional theory calculations. We report the successful formation of a bulk material characterized by a strong interaction of the molecular compounds which affects the optical properties significantly. Our investigations reveal a significant charge transfer, whereas the MnPc molecule is oxidized and F4TCNQ is reduced. The valence band data indicate a full charge transfer between the two partners. The electronic excitation spectrum reveals a relatively small energy gap of MnPc/F4TCNQ of about 0.7 eV, which is related to a charge transfer excitation. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index