Huyal Ilkem O, Ozel Tuncay, Tuncel Donus, Demir Hilmi V
Department of Physics, Nanotechnology Research Center, Institute of Materials Science and Nanotechnology, Bilkent University, Bilkent, Ankara, Turkey.
Opt Express. 2008 Aug 18;16(17):13391-7. doi: 10.1364/oe.16.013391.
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.
我们报道了聚芴共轭聚合物纳米颗粒，与直接由相同聚合物溶液制成的固态聚合物薄膜相比，该纳米颗粒在薄膜中表现出更高的荧光量子效率（68%），并减少了薄膜中不期望的发射峰波长偏移（20纳米）。通过简便的再沉淀法，将聚[9,9-二己基-9H-芴]在四氢呋喃中的溶液以不同体积比添加，以获得水中纳米颗粒分散体的不同尺寸分布。这使我们能够控制聚芴纳米颗粒的尺寸依赖性光发射。这种有机纳米颗粒在光电器件应用中作为高效发光体具有巨大的应用前景。
