AB-INITIOSTUDY ON THE EXCITON BINDING ENERGIES IN ORGANIC SEMICONDUCTORS

• DOI: 10.1142/s0217984906010603
• Publication Date: 2006-03-07T11:18:34Z
• Authors: KERSTIN HUMMER; PETER PUSCHNIG; STEPHAN SAGMEISTER; CLAUDIA AMBROSCH-...
• Keywords: Organic semiconductor

In this work, the optical properties including excitonic effects of organic semiconductors investigated within an ab-initio framework are reviewed. particular, imaginary part frequency-dependent dielectric tensor has been calculated for several molecular crystals consisting short molecules and polymers, which comprise prime examples versatile class semiconductors. The electron-hole interaction included by solving Bethe–Salpeter equation two-particle Green's function. This approach allows evaluation exciton binding energies in such materials, major interest concerning their technological application opto-electronic devices. results presented herein compared to experimental data surveyed together with previously reported theoretical findings, where particular emphasis is placed on analyzing sensitivity different approximations applied approaches. context, first influence three-dimensional crystal environment versus one dimensional chains addressed polymers. Second, dependence energy size studied comparing obtained oligomers those found As last aspect, intermolecular applying hydrostatic pressure.