Electron Paramagnetic Resonance Study of Triplet Exciton Dynamics in Organic Molecular Crystals.
Abstract
Optically excited triplet excitons in crystalline anthracene, pyrene, and tetracene were studied at room temperature and at a frequency of 24 GHz. A theoretical and experimental re-examination of the electron paramagnetic resonance spectrum employs the solution of a set of rate equations using spin relaxation rates deduced from the linewidth spectrum. The populating rates are derived from Suna's theory of diffusion mediated exciton-exciton annihilation as applied to the prompt fluorescence from tetracene. Calculated spectra are in favorable agreement with experiment results.
- Publication:
-
Ph.D. Thesis
- Pub Date:
- 1978
- Bibcode:
- 1978PhDT........80B
- Keywords:
-
- Physics: Condensed Matter;
- Atomic Energy Levels;
- Crystal Lattices;
- Electron Paramagnetic Resonance;
- Organic Compounds;
- Anthracene;
- Fluorescence;
- Optical Polarization;
- Pyrenes;
- Room Temperature;
- Spin Tests;
- Solid-State Physics