Synthesis of organosilanylene–pentathienylene alternating polymers and their application to the hole-transporting materials in double-layer electroluminescent devices

Polymers composed of an alternating arrangement of organosilanylene and pentathienylene units, [SiBu2-X-SiBu2-(2,5-C4H2S)5]n (1: X=none, 2: X=O) were prepared and their application to the hole-transport in double-layer electroluminescent (EL) devices was studied. The EL devices with the structure of ITO/1 or 2/Alq/Mg:Ag emitted a green light resulting from Alq emission by applying the bias voltage. The device with 1 showed a lower turn-on voltage than that with 2, while almost the same maximum luminance of 4000 cd m−2 was obtained from both of the devices.