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

Abstract Polymers composed of an alternating arrangement of organosilanylene and pentathienylene units, [SiBu 2 -X-SiBu 2 -(2,5-C 4 H 2 S) 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.