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Photo and Electroluminescent Properties of a Porphyrin-Poly(p-Phenylene Vinylene) Derivative

Published online by Cambridge University Press:  21 March 2011

J. Morgado
Affiliation:
Cavendish Laboratory, Madingley Road, Cambridge, CB3 0HE, UK Dep. Eng. Química, Instituto Superior Técnico, Av. Rovisco Pais, P-1049-001 Lisboa, Portugal
R. Iqbal
Affiliation:
Melville Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge, Pembroke Street, Cambridge, CB2 3RA, UK
G. Yahioglu
Affiliation:
Department of Chemistry, Imperial College, London SW7 2AZ, UK
L. R. Milgrom
Affiliation:
Department of Chemistry, Imperial College, London SW7 2AZ, UK
S. C. Moratti
Affiliation:
Melville Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge, Pembroke Street, Cambridge, CB2 3RA, UK
A. B. Holmes
Affiliation:
Melville Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge, Pembroke Street, Cambridge, CB2 3RA, UK
R. H. Friend
Affiliation:
Cavendish Laboratory, Madingley Road, Cambridge, CB3 0HE, UK
F. Cacialli
Affiliation:
Cavendish Laboratory, Madingley Road, Cambridge, CB3 0HE, UK
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Abstract

The solid state luminescent properties of new statistical copolymers of 2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylene vinylene and a porphyrin-substituted phenylene vinylene are reported. The photoluminescence, PL, emission shows an efficient energy transfer to the porphyrin, in spite of the small absorption coefficient of the porphyrin in the wavelength range of the poly [2-methoxy-5-(2'- ethylhexyloxy)-1,4-phenylene vinylene], MEH-PPV, emission. At a porphyrin content of 0.25%, by weight, the emission is already dominated by the porphyrin. The PL efficiency of these copolymers is significantly reduced from the value of 13% for MEH-PPV down to 3% for the copolymer with 10.84% of porphyrin. Efficient energy transfer is also observed in the emission spectra of light-emitting diodes.

Type
Research Article
Copyright
Copyright © Materials Research Society 1999

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Photo and Electroluminescent Properties of a Porphyrin-Poly(p-Phenylene Vinylene) Derivative
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