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Issue 16, 2009
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Electroluminescence from printed stellate polyhedral oligomeric silsesquioxanes

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Abstract

Iridium-based stellate (star-shaped) polyhedral oligomeric silsesquioxane macromolecular dyes were synthesized and an inkjet printing process to deposit inks based on these materials was developed. Polymeric–macromolecular blended light emitting diodes based on these hybrid organic–inorganic dyes were studied. We find peak luminances of ∼10,000 cd/m2 with peak quantum efficiencies of ∼2.5% are possible with the printed layers. White light interferometry measurements suggest that large printed layer thicknesses and interface roughness play a crucial role in limiting device performance. A cumulative coffee-ring effect is considered to be the source of interface roughness.

Graphical abstract: Electroluminescence from printed stellate polyhedral oligomeric silsesquioxanes

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Publication details

The article was received on 19 Feb 2009, accepted on 16 Jun 2009 and first published on 14 Jul 2009


Article type: Communication
DOI: 10.1039/B903531A
Citation: Soft Matter, 2009,5, 3002-3005
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    Electroluminescence from printed stellate polyhedral oligomeric silsesquioxanes

    M. Singh, H. S. Chae, J. D. Froehlich, T. Kondou, S. Li, A. Mochizuki and G. E. Jabbour, Soft Matter, 2009, 5, 3002
    DOI: 10.1039/B903531A

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