We demonstrate bright and efficient spin-coated yellow organic light emitting diodes (OLEDs) employing as active medium a novel thiophene-based compound, in which the conventional linear structure of the oligothiophenes has been replaced by a branched benzo[b]thiophene-based structure. Such a structure, combined with the oxygen functionalization of the core-thienyl sulphur atom and the cyclohexyl substitution of the lateral thienyl rings, allowed us to obtain a brightness up to 10,500cd/m(2) and an external quantum efficiency up to 0.48%, which are the highest values so far obtained by substituted oligothiophene-based compounds.
|Autori:||Marco Mazzeo; Dario Pisignano; Laura Favaretto; Giovanna Barbarella; Roberto Cingolani; Giuseppe Gigli|
|Titolo:||Bright oligothiophene-based light emitting diodes|
|Anno del prodotto:||2003|
|Digital Object Identifier (DOI):||10.1016/S0379-6779(03)00304-7|
|Appare nelle tipologie:||1.1 Articolo in rivista|