Abstract
We present Raman studies of the vibrational properties of 3,4,9,10-perylene tetracarboxylic dianhydride (PTCDA) single crystals. Davydov splitting of internal molecular vibrations due to the interaction of two molecules in a unit cell was observed. Features of PTCDA crystal lattice vibrations in the low-frequency region of the Raman spectra are reported. PTCDA films deposited on passivated Si and GaAs surfaces also reveal the specific features of crystalline structure: Davydov splitting and appearance of phonon lines in Raman spectra.
Original language | English |
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Pages (from-to) | 14564-14569 |
Number of pages | 6 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 61 |
Issue number | 21 |
DOIs | |
State | Published - 2000 |