Accession Number : ADA338069

Title :   Exciplex Emission from Bilayers of Poly (vinyl carbazole) and Pyridine-Based Conjugated Polymers

Descriptive Note : Technical rept.

Corporate Author : OHIO STATE UNIV COLUMBUS DEPT OF PHYSICS

Personal Author(s) : Gebler, D. D. ; Wang, Y. Z. ; Fu, D. K. ; Swager, T. M. ; Epstein, A. J.

PDF Url : ADA338069

Report Date : 06 FEB 1998

Pagination or Media Count : 29

Abstract : 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 show a similar new photoluminescence emission for a large range of concentrations. Absorption and photoluminescence excitation spectra confirm that the additional feature is an excited state species which resulted from an exciplex at the polymer/polymer interface. Bilayer light-emitting devices utilizing the PpyVPV copolymers show an electroluminescence spectrum consistent with emission from the exciplex. The efficiency of the bilayer devices as compared to single layer devices increases by over 3 orders of magnitudes due to the 4exciplex formation and the elimination of exciton formation near the luminescent quenching electrodes.

Descriptors :   *EMISSION, *POLYMERS, *ELECTROLUMINESCENCE, *COPOLYMERS, *PYRIDINES, INTERFACES, LAYERS, EXCITATION, PHOTOLUMINESCENCE, LIGHT, QUENCHING, SPECTRA, ELECTRODES, ABSORPTION, ELIMINATION, EXCITONS.

Subject Categories : Polymer Chemistry
      Electricity and Magnetism
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE