Blue Light Emitting Diodes based on a partially conjugated Si-containing PPV-copolymer in a multilayer configuration

Efficient blue Light Emitting Diodes (LEDs) based on a novel partially conjugated co-polymer (SiPPV) have been realized by a combination of techniques known to enhance the quantum efficiency of organic devices. The copolymer is homogeneously blended in a PVK-matrix to reduce the number of non-radiat...

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Bibliographic Details
Published in:Synthetic metals 1997-03, Vol.85 (1), p.1253-1254
Main Authors: Garten, F., Hilberer, A., Cacialli, F., Esselink, F.J., van Dam, Y., Schlatmann, A.R., Friend, R.H., Klapwijk, T.M., Hadziioannou, G.
Format: Article
Language:English
Subjects:
Application fields
Applied sciences
electroluminescence
Electronics
Exact sciences and technology
LED
multilayer
Optoelectronic devices
polymer
Polymer industry, paints, wood
PPV
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Technology of polymers
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Summary:Efficient blue Light Emitting Diodes (LEDs) based on a novel partially conjugated co-polymer (SiPPV) have been realized by a combination of techniques known to enhance the quantum efficiency of organic devices. The copolymer is homogeneously blended in a PVK-matrix to reduce the number of non-radiative decay paths. In single-layer devices the high barrier at the Al top electrode limits efficient electron-injection into the device. In double-layer structures with an evaporated PBD-film at the cathodic side, electron and hole currents are much more balanced, resulting in an internal quantum efficiency of 3.2 %. The average turn-on field of a double-layer device is reduced compared to a single-layer LED
ISSN:0379-6779
1879-3290
DOI:10.1016/S0379-6779(97)80227-5