Accession Number : ADA330200
Title : Exciplex Emission in Bilayer Polymer Light-Emitting Devices
Descriptive Note : Technical rept.
Corporate Author : OHIO STATE UNIV COLUMBUS DEPT OF PHYSICS
Personal Author(s) : Gebler, D. D. ; Wang, Y. Z. ; Blatchford, J. W. ; Jessen, S. W.
PDF Url : ADA330200
Report Date : 20 SEP 1997
Pagination or Media Count : 15
Abstract : 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%.
Descriptors : *POLYMERS, *HETEROJUNCTIONS, *LIGHT EMITTING DIODES, EMISSION, PEAK VALUES, EXCITATION, ELECTROLUMINESCENCE, PHOTOLUMINESCENCE, LIGHT, EFFICIENCY, SPECTRA, ABSORPTION.
Subject Categories : Organic Chemistry
Electricity and Magnetism
Atomic and Molecular Physics and Spectroscopy
Distribution Statement : APPROVED FOR PUBLIC RELEASE