An organic electroluminescent device that comprises a substrate (203), a transparent first conductive layer (201) next to the substrate, an electron-transporting and light-emitting layer (209), a hole-transporting layer (205) sandwiched between the first conductive layer and the electron-transporting and light-emitting layer, and a second conductive layer (211) next to the electron-transporting and light-emitting layer and remote from the hole-transporting layer. The hole-transporting layer comprises a poly(arylamine) including at least one compound of one or more compounds of from about 5 to about 1000 of monomer. The monomers useful in the preparation of the poly(arylamines) comprise two amino moieties in which each amino moiety is bound to three aryl moieties in which two halo moieties are optionally bound to the monomer.