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

• 来源期刊: 科学通报(英文版)
• 学科: 工学
• 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
• 年，卷（期）: 2010,（18）
• 页码范围: 1859-1863
• 页数: 5页
• 分类号: TN386 TL817.4
• 语种: 英文

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.