Time-of-flight photocarrier mobility in Langmuir-Blodgett films of regioregular poly(3-hexylthiophene)

Time-of-flight (TOF) measurements art conducted in annealed (50 degrees C) Langmuir-Blodgett (LB) films of chemically prepared regioregular 33.5% undo ped poly(3-hexylthiophene) (P3HT) mixed with 66.5% stearic acid. The charac terization of these poly(3-hexylthiophene)-stearic acid (P3HT-SA) films is accomplished using scanning electron microscopy (SEM), atomic force microsc opy (AFM) and UV-visible analyses. Thr value of the TOF photocarrier mobili ty obtained in P3HT-SA LB film sandwiched between metal (Al) and indium-tin -oxide (ITO) glass is experimentally determined as 1.8 x 10(-5) cm(2)/Vs at an applied field of 1.3 x 10(6) V/cm.