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
      Polymer Chemistry
      Electricity and Magnetism
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE