Dipyridylphenylaminosilole:a case of luminescence enhancement by chromophoric synergism

摘要

High performance single-layer organic electroluminescent(EL)devices based on 1,1-dimetrryl-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.