Electron-Beam-Induced Conduction in Polystyrene
Electron-Beam-Induced Conduction in Polystyrene
复制标题
聚苯乙烯中的电子束感应传导
DOI：
10.1143/jjap.18.1479
复制
发表时间：
1979
影响因子：
1.5
通讯作者：
Y. Inuishi
中科院分区：
文献类型：
--
作者：
J. Kyokane;S. Harada;K. Yoshino;Y. Inuishi
用短脉冲电子束研究了PS的载流子迁移率。即使在具有π电子系统的聚合物中，在低外加场下也没有观察到明显的诱导电荷信号拐点。感应电流对时间的对数图在时间Tr处给出拐点，其被认为是电极之间的载流子前沿的渡越时间。通过公式µ=L/TrE简单计算，在293 K下，电子的表观载流子迁移率µ为2.5×10-5，空穴的表观载流子迁移率为1.2×10-5 cm 2/Vsec。这些表观迁移率是一个小的比那些（10-4-10-5厘米2/Vsec）估计从拐点的感应电荷信号在较高的领域在以前的报告。因此，所测量的迁移率是场无关的，并随着温度的增加与约0.4 eV的电子和空穴的激活能。
The carrier mobilities of PS were studied using a short-pulsed electron-beam. Even in the polymer with a π-electron system, no clear knee was observed in the induced charge signals at low applied fields. A logarithmic plot of the induced current versus time gives a knee at time Tr, which is thought to be the transit time of the carrier front between electrodes. Simple calculation by the formula µ=L/TrE gives an apparent carrier mobility µ of 2.5×10-5 for electrons and 1.2×10-5 cm2/Vsec for holes, at 293 K. These apparent mobilities are a little smaller than those (10-4–10-5 cm2/Vsec) estimated from the knee point of the induced charge signal at higher fields in previous reports. Thus the measured mobility is field-independent and increases with temperature with an activation energy of about 0.4 eV for both electrons and holes.