Dipyridylphenylaminosilole : a case of luminescence enhancement by chromophoric synergism

Abstract High performance single-layer organic electroluminescent (EL) devices based on 1,1-dimethyl-2,5-bis( p -2,2′-dipyridylaminophenyl)-3,4-diphenylsilole as both electron and hole-transporting material are described. This compound displays a very high EL performance in the yellow–green domain with a maximum efficiency of 27 Cd/A and 6 lm/W. In comparison with the other siloles described by Tamao et al. such luminescence enhancement may originate from an energy transfer from the 2,5-diaryl side-groups to the central silole ring. To cite this article: L. Aubouy et al., C. R. Chimie 8 (2005) .