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 11422 cd m-2 and 3.25 cd A-1
First disubstituted dibenzothiophene-5,5-dioxide monodispersed molecular materials for efficient blue-electroluminescence / Grisorio, R.; Melcarne, G.; Suranna, G. P.; Mastrorilli, P.; Nobile, C. F.; Cosma, P.; Fini, P.; Colella, S.; Fabiano, E.; Piacenza, Massimiliano; Della Sala, F.; Ciccarella, G.; Mazzeo, M.; Gigli, G.. - In: JOURNAL OF MATERIALS CHEMISTRY. - ISSN 0959-9428. - STAMPA. - 20:5(2010), pp. 1012-1018. [10.1039/B913628B]
First disubstituted dibenzothiophene-5,5-dioxide monodispersed molecular materials for efficient blue-electroluminescence
Grisorio, R.;Suranna, G. P.;Mastrorilli, P.;
2010-01-01
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 11422 cd m-2 and 3.25 cd A-1I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
