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Enhanced Electroluminescence of Urethane Containing Processable Polythiophene Derivative by Addition of Dye Molecules

Published online by Cambridge University Press:  21 March 2011

Amarjeet Kaur ,
Mario J. Cazeca ,
Kethinni G. Chittibabu ,
Jayant Kumar  and
Sukant K. Tripathy
Amarjeet Kaur
Affiliation:
Departments of Physics and Chemistry, Center for Advanced Materials, University of Massachusetts, Lowell, MA
Mario J. Cazeca
Affiliation:
Molecular Technologies, Westford, MA
Kethinni G. Chittibabu
Affiliation:
Molecular Technologies, Westford, MA
Jayant Kumar
Affiliation:
Departments of Physics and Chemistry, Center for Advanced Materials, University of Massachusetts, Lowell, MA
Sukant K. Tripathy
Affiliation:
Departments of Physics and Chemistry, Center for Advanced Materials, University of Massachusetts, Lowell, MA
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Abstract

Organic electroluminescent (EL) diodes based on fluorescent dyes and conducting polymers have attracted the interest of researchers, mainly because of their emission in the visible region and for application to large area portable flat panel display devices, driven at low voltages. Therefore, for the development of higher efficiency polymer EL diodes, the optimal combination of the merits of organic fluorescent dye molecules with that of conjugated polymer is an important approach. We report electroluminescence studies of polymer light emitting diodes (p-LEDs) fabricated with poly[2-(3-thienyl)ethanol n-butoxy carbonylmethyl urethane] (PURET) and its composite with 4-dicyanomethylene-2-methyl-6-(p-dimethylaminostyryl)-4H pyran (DCM) dye. These materials have been chosen in view of the fact that PURET exhibits a small overlap between emission and absorption spectra whereas DCM has a good efficiency of trapping both electrons as well as holes. Polyaniline has been utilized as hole injecting layer whereas tris-8-hydroxyquinoline-aluminum as electron injecting layer. Enhanced electroluminescence with bright yellow color has been observed in p-LEDs by the addition of dye.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 660: Symposia JJ – Organic Electronic & Photonic Materials and Devices , 2000 , JJ5.30
Copyright
Copyright © Materials Research Society 2001

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References

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