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Optical Engineering

Light-emitting diodes based on copolymer organic semiconductors
Author(s): Danilo B. Romero; Michel Schaer; Libero Zuppiroli; Bertrand Cesar; Gilles Widawski; Bernard Francois
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Paper Abstract

Light-emitting diodes (LED5) based on organic semiconductors have received much attention recently due to their promise as cheap, novel light sources for electro-optical applications. Unlike conventional diodes, light emission from these organic LEDs is achieved by double injection of electrons from a low-work-function electrode and holes from a high-work-function electrode into the organic polymer light-emitting layer. By appropriately engineering the polymer backbone, emission of various visible colors has been demonstrated. Our work in this field has concentrated on organic block copolymers as the active light-emitting materials. We demonstrate that the use of copolymer systems leads to large enhancement of device performance.

Paper Details

Date Published: 1 July 1995
PDF: 6 pages
Opt. Eng. 34(7) doi: 10.1117/12.204690
Published in: Optical Engineering Volume 34, Issue 7
Show Author Affiliations
Danilo B. Romero, Ecole Polytechnique Federale de Lausanne (Switzerland)
Michel Schaer, Swiss Federal Institute of Technology (Switzerland)
Libero Zuppiroli, Swiss Federal Institute of Technology (Switzerland)
Bertrand Cesar, Institut Charles Sadron (France)
Gilles Widawski, Institut Charles Sadron (France)
Bernard Francois, Institut Charles Sadron (France)

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