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Efficient ultraviolet-blue polymer light-emitting diodes based on a fluorene-based non-conjugated polymer.
- Source :
- Applied Physics Letters; 8/21/2006, Vol. 89 Issue 8, p081104, 3p, 1 Diagram, 1 Chart, 3 Graphs
- Publication Year :
- 2006
-
Abstract
- Efficient UV-blue polymer light-emitting diodes based on a fluorene-based nonconjugated polymer, poly[2,7-(9,9-dihexylfluorene)-alt-4,4<superscript>′</superscript>-phenylether] (PFPE), are fabricated. The device with PFPE as emitting layer shows a very narrow ultraviolet-blue electroluminescence emission with a peak at 397 nm and a maximal external quantum efficiency of 1.07%. By blending PFPE into poly(N-vinylcarbazole) (PVK), the device performance can be further improved. A maximum external quantum efficiency of 1.81%, with a maximum irradiance power density of 1223 μW/cm<superscript>2</superscript>, was reached by using a blend of PVK and PFPE in the weight ratio of 95:5 as emitting layer. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 89
- Issue :
- 8
- Database :
- Complementary Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 22257002
- Full Text :
- https://doi.org/10.1063/1.2336745