Singlet-Exciton Fusion in Molecular Solids: A Direct Subpicosecond Determination of Time-Dependent Annihilation Rates
- 16 September 1985
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 55 (12), 1331-1334
- https://doi.org/10.1103/physrevlett.55.1331
Abstract
The first kinetic data displaying a time-dependent singlet-exciton-annihilation rate have been observed. Subpicosecond optical excitation of polycrystalline thin-film samples of -hydrogen phthalocyanine resulted in excitonic saturation of the crystal lattice. The initial exciton decay yields the only unambiguous measurement of a characteristic annihilation interaction rate for molecular excitons on adjacent lattice sites.
Keywords
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