Charge Dynamics Study of the Percolation Threshold in a Polymer-Fullerene Composite System

被引：0
|
作者：
Kyu Hyun Mo
Dong Min Choi
Cheol Eui Lee
机构：
[1] Korea University,Department of Physics
来源：
Journal of the Korean Physical Society | 2019年 / 74卷
关键词：
Charge dynamics; Fullerene-doped MEH-PPV conjugated polymers; Percolation threshold;
D O I：
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学科分类号：
摘要：
A fullerene percolation threshold has been identified in the current density-voltage (J-V) characteristics of a 5-(2’-ethyl-hexyloxy)-p-phenylene-vinylene (MEH-PPV) conjugated polymer and fullerene (C60) composite system. Charge dynamics associated with the percolation threshold was studied in this work by means of time-of-flight (TOF) measurements of the charge carrier mobilities. The hole mobility showed little change up to a fullerene concentration of 1 wt.%. On the other hand, the electron mobility increased with increasing fullerene concentration and exhibited a critical behavior with a maximum at a percolation threshold of 0.8 wt.%, at which a minimum in the energetic disorder took place.
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页码：527 / 529
页数：2
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