Dipyridylphenylaminosilole: a case of luminescence enhancement by chromophoric synergism

Nous decrivons dans cette communication la realisation et l'evaluation de diodes electroluminescentes organiques monocouches a hautes performances basees sur le 1,1-dimethyl-2,5-bis(p-2,2'-dipyridylaminophenyl)-3,4-diphenylsilole agissant a la fois en tant que transporteur de trous et d'electrons. Ce compose presente de tres bonnes proprietes en electroluminescence dans le domaine de couleur jaune-vert avec une efficacite de 16 Cd/A et 4 Im/W a 100 Cd/m 2 . En comparaison avec les autres siloles decrits par Tamao et al. une telle amelioration des performances peut etre expliquee par un mecanisme de transfert d'energie entre les groupes aryles en position-2,5 et le noyau silole central.

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