Light-emitting dendrimer film morphology: A neutron reflectivity study

S. V. Vickers, H. Barcena, K. A. Knights, R. K. Thomas, J. -C. Ribierre, S. Gambino, I. D. W. Samuel, P. L. Burn, Giovanna Fragneto

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15 Citations (Scopus)


We have used neutron reflectivity (NR) measurements to probe the physical structure of phosphorescent dendrimer films. The dendrimers consisted of fac-tris(2-phenylpyridyl)iridium(III) cores, biphenyl-based dendrons (first or second generation), and perdeuterated 2-ethylhexyloxy surface groups. We found that the shape and hydrodynamic radius of the dendrimer were both important factors in determining the packing density of the dendrimers. "Cone" shaped dendrimers were found to pack more effectively than "spherical" dendrimers even when the latter had a smaller radius. The morphology of the films determined by NR was consistent with the measured photoluminescence and charge transporting properties of the materials. (C) 2010 American Institute of Physics. [doi:10.1063/1.3457438]

Original languageEnglish
Article number263302
Number of pages3
JournalApplied Physics Letters
Issue number26
Publication statusPublished - 28 Jun 2010


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