Effect of polymer-insulating nanolayers on electron injection in polymer light-emitting diodes
- 8 March 2004
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 84 (10) , 1783-1785
- https://doi.org/10.1063/1.1667014
Abstract
We report the effect of polymer-insulating nanolayers on electron injection in the polymer light-emitting diodes(PLEDs) in which a hole is the major charge carrier. Several different polymer nanolayers with varying dielectric constants were placed between the emitting layer and the aluminumcathode, and their influence on the device performance was investigated. The device with a nanolayer of lower dielectric constant demonstrated higher luminescence quantum efficiency. In particular, when a ∼10-nm-thick polystyrene layer was employed, the device gave approximately two orders of magnitude higher external quantum efficiency than that of the one without an insulating nanolayer.Keywords
This publication has 20 references indexed in Scilit:
- Polymer-Layered Silicate Nanocomposite Light-Emitting DevicesAdvanced Materials, 2001
- The Effect of Different Heat Treatments on the Luminescence Efficiency of Polymer Light-Emitting DiodesAdvanced Materials, 2000
- Electroluminescence of Multicomponent Conjugated Polymers. 1. Roles of Polymer/Polymer Interfaces in Emission Enhancement and Voltage-Tunable Multicolor Emission in Semiconducting Polymer/Polymer HeterojunctionsMacromolecules, 2000
- Electroluminescence and Photophysical Properties of PolyquinolinesMacromolecules, 1999
- Highly efficient and bright organic electroluminescent devices with an aluminum cathodeApplied Physics Letters, 1997
- Enhanced electron injection in organic electroluminescence devices using an Al/LiF electrodeApplied Physics Letters, 1997
- Use of poly(phenyl quinoxaline) as an electron transport material in polymer light-emitting diodesApplied Physics Letters, 1996
- Improved efficiency in polymer light-emitting diodes using air-stable electrodesJournal of Electronic Materials, 1993
- Visible light emission from semiconducting polymer diodesApplied Physics Letters, 1991
- Light-emitting diodes based on conjugated polymersNature, 1990