Electrochemical deposition of end-capped triarylamine and carbazole dendrimers: Alternate technique for the manufacture of multilayer films

Abstract

The electrochemical deposition behavior of triarylamine or carbazole end-capped carbosilane dendrimers and their use for the formation of multilayer structure of the dendrimer type used in organic light-emitting diodes (OLEDs), are discussed. These end-capped dendrimers of the type Gn-2n+1NPB or Gn-2n+1CBP were prepared through divergence synthesis on the basis of reaction of diethyl propagating carbosilane dendrimers with suitable functional groups such as naphthaylphenylaminophenyl (NPB) or carbazolylphenyl (CBP) unit. With the aid of this novel electrochermical deposition method, NPB and CBP dendrimer films were grown onto an indium tin oxide (ITO surface. The film thickness can be adjusted by varying the number of cyclic voltammetric cycles, and multilayer films can be fabricated without causing any damage to the previous layer.