Exciplex emission in bilayer polymer light-emitting devices
نویسندگان
چکیده
Photoluminescent and electroluminescent studies of bilayer heterojunctions formed from a poly~pyridyl vinylene phenylene vinylene! ~PPyVPV! derivative and poly~vinyl carbazole! ~PVK! show an emission peak which cannot be ascribed to either the PPyVPV derivative or PVK layer. Through studies of absorption and photoluminescence excitation ~PLE! spectra we demonstrate that the additional feature results from an exciplex at the bilayer interface. The photoluminescence efficiency of the exciplex is greater than 20%. The electroluminescence spectrum from the bilayer devices is entirely due to exciplex emission, with internal efficiencies initially achieved exceeding 0.1%. © 1997 American Institute of Physics. @S0003-6951~97!00413-0#
منابع مشابه
Exciplex emission from bilayers of poly„vinyl carbazole... and pyridine based conjugated copolymers
We present photoluminescence and electroluminescence studies of bilayers and blends formed from poly~vinyl carbazole! ~PVK! and poly~pyridyl vinylene phenylene vinylene! ~PPyVPV! copolymer derivatives. Bilayers of PVK and the PPyVPV copolymers have a photoluminescence emission which cannot be assigned to either the photoluminescence of PVK or the PPyVPV layer. The blends of the two polymers sho...
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