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Light-Emitting Devices Based on Ruthenium (II) Bipyridine Complexes Coupled with Cadmium Sulfide Nanoparticles

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The fabrication of a light-emitting device based on a composite consisting of cadmium sulfide nanoparticle, poly(vinylalcohol), and ruthenium 2,2′-bipyridyl complex is reported. The electroluminescence spectrum of this composite is similar to the combination of the emission from ruthenium complexes and cadmium sulfide. A stable electroluminescence at low threshold voltage (4 V), with a brightness of 680 cd/m2 and an external quantum efficiency of approximately 0.2% was achieved. It was demonstrated that the cadmium sulfide nanoparticles were able to improve the performance of the device and enhance the electron carrier mobility as compared to the device based on pure ruthenium complex.
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Keywords: CDS NANOPARTICLES; CHARGE MOBILITY; LIGHT-EMITTING DIODES; ORGANIC ELECTROLUMINESCENCE; RUTHENIUM BIPYRIDINE COMPLEX

Document Type: Research Article

Affiliations: Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong

Publication date: 2002-04-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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