Dispersive and nondispersive charge transport in a molecularly doped polymer with superimposed energetic and positional disorder.
Dispersive and nondispersive charge transport in a molecularly doped polymer with superimposed energetic and positional disorder.
复制标题
具有叠加能量和位置无序的分子掺杂聚合物中的分散和非分散电荷传输。
DOI：
10.1103/physrevb.47.4289
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
Baessler
中科院分区：
文献类型：
--
作者：
Borsenberger;Richert;Baessler
1，1-双（二-4-甲苯氨基苯基）环己烷掺杂的双酚A-聚碳酸酯的飞行时间光电流测量显示在低温下的色散特征。在非色散区，瞬态表现出普遍形状的异常宽的尾部。它们的相对宽度是定量的雅阁Monte Carlo模拟的材料，其特征在于程度的能量和位置的障碍，先前已确定从温度和场的依赖性的流动性。的过渡到分散运输，描绘的载流子平均渡越时间的温度依赖性的变化，发生在一个关键的充满活力的无序参数模拟预测。位置无序的影响是减小光电流瞬态的后沿的斜率。
Time-of-flight photocurrent measurements of 1,1-bis(di-4-tolylaminophenyl)cyclohexane doped bisphenol-A-polycarbonate show dispersive features at low temperatures. Within the nondispersive regime, transients show anomalously broad tails of universal shape. Their relative width is in quantitative accord with Monte Carlo simulations of a material characterized by degrees of energetic and positional disorder that have previously been determined from the temperature and field dependencies of the mobility. The transition to dispersive transport, delineated by a change of the temperature dependence of the carrier mean transit time, occurs at a critical energetic disorder parameter as predicted by simulation. The effect of positional disorder is to decrease the slope of the trailing edge of the photocurrent transient.