Berlin 2005 – wissenschaftliches Programm
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SYOO: Organic Optoelectronics and Photonics
SYOO 6: Poster
SYOO 6.61: Poster
Montag, 7. März 2005, 18:00–20:00, Poster TU A
Spectroscopic properties of different perylene derivatives — •Harald Graaf1, Christine Mattheus2, Thomas Unold3, and Derck Schlettwein3 — 1Insitut für Physik, TU Chemnitz, 09107 Chemnitz — 2Department Solar Energy, Hahn-Meitner-Institut Berlin, 14109 Berlin — 3Institut für Angewandte Physik, Justus Liebig Universität Gießen, 35392 Gießen
Intermolecular interactions of molecules of perylene carboxylic acid derivatives (PTCD) and therefore there spectroscopic properties can be strongly influenced by chemical modification at the aromatic core. While unsubstituted PTCD showed strong chromophore coupling in the solid state, bay-chlorinated Cl4PTCD is characterized by weak intermolecular interactions which can be clearly seen in optical studies. Temperature dependent luminescence measurements at thin films of both materials were obtained. The results indicate the formation of different radiative decay channels due to different arrangements of molecules in the solid state as it was shown before for PTCDA [1].
[1] A. Yu. Kobitski, R. Scholz, H.P. Wagner, D.R.T. Zahn, Phys.Rev.B 68, 155201 (2003)