Exciplex Emission in Heterojunctions of Poly (pyridyl vinylene phenylene vinylene)s and Poly (vinyl carbazole)
OHIO STATE UNIV COLUMBUS DEPT OF PHYSICS
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We present photoluminescence and electroluminescence spectra of heterojunctions formed from polyvinyl carbazole PVK and polypyridyl vinylene phenylene vinylene PPyVPV. Bilayers of PVK and PPyVPV show a photoluminescence peak which cannot be assigned to either the PVK or the PPyVPV layer. Absorption spectra show that the additional feature results from an exciplex at the bilayer interface. The electroluminescence spectrum from the heterojunctions is due to exciplex emission, with internal efficiencies of approx. 0.1-0.5.
- Organic Chemistry
- Polymer Chemistry
- Atomic and Molecular Physics and Spectroscopy