Excimers and Exciplexes of Conjugated Polymers
ROCHESTER UNIV NY DEPT OF CHEMICAL ENGINEERING
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Observations of intermolecular excimers in several pi-conjugated polymers and exciplexes of these polymers with trisp-tolylamine are reported. It is shown that the luminescence of conjugated polymer thin films originates from excimer emission and that the generally low quantum yield is due to self-quenching. Thus in sufficiently dilute solution, the single-chain emission has a quantum yield of unity. Exciplex luminescence and exciplex-mediated charge photogeneration have much higher quantum yields than the excimer-mediated photophysical processes. These results provide a new basis for understanding and controlling the photophysics of conjugated polymers in terms of supramolecular structure and morphology.
- Organic Chemistry
- Polymer Chemistry
- Lasers and Masers