Measurement of carrier mobility of polymer using a charge-separation layer  

作　　者：XU Miao HUANG WenBo PENG JunBiao 

机构地区：[1]Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, and Key Laboratory of Specially FunctionalMaterials, Ministry of Education, Guangzhou 510640, China

出　　处：《Chinese Science Bulletin》2010年第18期1859-1863,共5页

基　　金：supported by the National Basic Research Program of China (2009CB623604 and 2009CB930604);National Natural Science Foundation of China (U0634003 and 60937001)

摘　　要：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 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 en- hanced 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.

关 键 词：飞行时间测量 聚合物载体 分离层 电荷 载流子迁移率 流动 信号波形 聚合物薄膜 

分 类 号：O484[理学—固体物理]