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A charge carrier mobility of polymer films with the time-of-flight(TOF) technique using a fullerene layer was measured and the TOF photocurrent waveform can be remarkably improved.The 80-nm-thick fullerene layer is functioned as a charge-separation layer(CSL) which was placed between ITO electrode and the polymer layer of MEH-PPV(poly[2-methoxy-5-(2'-ethylhexyloxy) 1,4-phenylenevinylene]).In the CSL,the photo-generated holes and electrons can be efficiently separated,resulting in an enhanced current signal and great improvement of TOF waveform.The sample structure with fullerene layer exhibits a great advantage to measure the hole mobilities of polymers with low energy band gap.
A charge carrier mobility of polymer films with the time-of-flight (TOF) technique using a fullerene layer was measured and the TOF photocurrent waveform can remarkably improved. 80-nm-thick fullerene layer is functioned as a charge-separation layer (CSL) which was placed between the ITO electrode and the polymer layer of MEH-PPV (poly [2-methoxy-5- (2'-ethylhexyloxy) 1,4-phenylenevinylene] electrons can be efficiently separated, resulting in an enhanced current signal and great improvement of TOF waveform. the sample structure with fullerene layer exhibits a great advantage to measure the hole mobilities of polymers with low energy band gap.