New Branched Thiophene-Based Oligomers for Bright Organic Light-Emitting Devices (pages 2060–2063)
M. Mazzeo, V. Vitale, F. Della Sala, D. Pisignano, M. Anni, G. Barbarella, L. Favaretto, A. Zanelli, R. Cingolani and G. Gigli
Version of Record online: 11 DEC 2003 | DOI: 10.1002/adma.200305356
A new class of oligothiophenes is realized by replacing the conventional linear structure with a branched benzo[b]thiophene-based structure (see Figure). These compounds are used as active materials in light-emitting diodes exhibiting record luminances up to 10 500 cd m–2 (see inset). Optical measurements and theoretical calculations show these performances are mainly to the distorted molecular structure.