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Issue 5, 2010
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First disubstituted dibenzothiophene-5,5-dioxide monodispersed molecular materials for efficient blue-electroluminescence

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Abstract

This study reports on the first monodispersed molecular materials embodying the dibenzothiophene-5,5-dioxide core for the achievement of blue electroluminescence. The core has been functionalised in its 2,8- or 3,7-positions with dimethyl-fluorene (2,8-DBTOF and 3,7-DBTOF) or methyl-carbazole (2,8-DBTOC and 3,7-DBTOC) groups. The obtained compounds were characterised by 1H and 13C NMR, APCI-MS, thermal analysis (TGA and DSC) and cyclic voltammetry. Their optical and photophysical properties were investigated by UV and PL measurements as well as by time-dependent density-functional theory calculations. The materials were successfully employed as active layers in blue to purplish blue p-i-n OLED devices, that reached, in the case of 3,7-DBTOC, performances as high as 11 422 cd m−2 and 3.25 cd A−1.

Graphical abstract: First disubstituted dibenzothiophene-5,5-dioxide monodispersed molecular materials for efficient blue-electroluminescence

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Supplementary files

Article information


Submitted
08 Jul 2009
Accepted
29 Oct 2009
First published
14 Dec 2009

J. Mater. Chem., 2010,20, 1012-1018
Article type
Paper

First disubstituted dibenzothiophene-5,5-dioxide monodispersed molecular materials for efficient blue-electroluminescence

R. Grisorio, G. Melcarne, G. P. Suranna, P. Mastrorilli, C. F. Nobile, P. Cosma, P. Fini, S. Colella, E. Fabiano, M. Piacenza, F. Della Sala, G. Ciccarella, M. Mazzeo and G. Gigli, J. Mater. Chem., 2010, 20, 1012
DOI: 10.1039/B913628B

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