Quantum efficiency enhancement in film by making nanoparticles of polyfluorene

Date
2008
Advisor
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Co-Advisor
Co-Supervisor
Instructor
Source Title
Optics Express
Print ISSN
1094-4087
Electronic ISSN
Publisher
Optical Society of America
Volume
16
Issue
17
Pages
13391 - 13397
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
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Abstract

We report on conjugated polymer nanoparticles of polyfluorene that were formed to exhibit higher fluorescence quantum efficiency in film (68%) and reduce undesired emission peak wavelength shifts in film (by 20 nm), compared to the solid-state polymer thin film made directly out of the same polymer solution without forming nanoparticles. Using the facile reprecipitation method, solutions of poly[9,9-dihexyl-9H-fluorene] in THF were added at different volume ratios to obtain different size distributions of nanoparticle dispersions in water. This allowed us to control the sizedependent optical emission of our polyfluorene nanoparticles. Such organic nanoparticles hold great promise for use as efficient emitters in optoelectronic device applications. (C) 2008 Optical Society of America.

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Book Title
Keywords
Conjugated Polymer Nanoparticles, Light-emitting Diode, Energy-transfer, Fluorescence, Relaxation, Dynamics, Blends
Citation
Published Version (Please cite this version)