Efficient blue LEDs from a partially conjugated Si-containing PPV copolymer in a double-layer configuration

Authors

  • Frank Garten,

    1. Materials Science Center (MSC), Applied Physics Department and Polymer Chemistry Department University of Groningen Nijenborgh 4.13, 9747 AG Groningen (The Netherlands)
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  • Dr. Alain Hilberer,

    1. Materials Science Center (MSC), Applied Physics Department and Polymer Chemistry Department University of Groningen Nijenborgh 4.13, 9747 AG Groningen (The Netherlands)
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  • Dr. Franco Cacialli,

    1. Cavendish Laboratory, University of Cambridge Madingley Road, Cambridge CB3 OHE (UK)
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  • Eddy Esselink,

    1. Materials Science Center (MSC), Applied Physics Department and Polymer Chemistry Department University of Groningen Nijenborgh 4.13, 9747 AG Groningen (The Netherlands)
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  • Yvonne van Dam,

    1. Materials Science Center (MSC), Applied Physics Department and Polymer Chemistry Department University of Groningen Nijenborgh 4.13, 9747 AG Groningen (The Netherlands)
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  • Dr. Bart Schlatmann,

    1. Materials Science Center (MSC), Applied Physics Department and Polymer Chemistry Department University of Groningen Nijenborgh 4.13, 9747 AG Groningen (The Netherlands)
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  • Prof. Richard H. Friend,

    1. Cavendish Laboratory, University of Cambridge Madingley Road, Cambridge CB3 OHE (UK)
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  • Prof. Teun M. Klapwijk,

    1. Materials Science Center (MSC), Applied Physics Department and Polymer Chemistry Department University of Groningen Nijenborgh 4.13, 9747 AG Groningen (The Netherlands)
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  • Prof. Georges Hadziioannou

    1. Materials Science Center (MSC), Applied Physics Department and Polymer Chemistry Department University of Groningen Nijenborgh 4.13, 9747 AG Groningen (The Netherlands)
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  • We thank M. Mulder for technical assistance, and D. Wilms Floet and H.-J. Brouwer for valuable discussions. Financial support from the “Stichting Scheikundig Onderzoek Nederland” (SON) and “Stichting voor de Technische Wetenschappen” (STW), as well as from the HCM program network “Functional materials organized at supramolecular level” is gratefully acknowledged.

Abstract

Efficient blue electroluminescent devices based on a novel silicon-containing poly(P-phenylene) derivative are described. It is shown that the turn-on field and internal quantum efficiency can be improved by using a double-layer device configuration instead of a single-layer one and by the addition of a transport layer at the cathodic side. The combined study of electrical and optical properties on one hand and morphological aspects on the other is demonstrated to be a fruitful approach to the improved performance of organic electronics.

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